182-510: U.S. Route 101 ( US 101 ) is a major north–south United States Numbered Highway , stretching from Los Angeles , California, to Tumwater, Washington . The California portion of US 101 is one of the last remaining and longest U.S. Routes still active in the state, and the longest highway of any kind in California. US 101 was also one of the original national routes established in 1926. Significant portions of US 101 between
364-616: A "memorable landscape" with no "visual intrusions", where the potential designation has gained popular favor with the community. The south terminus of US 101 is in Los Angeles , about one mile (1.6 km) east of downtown Los Angeles at the East Los Angeles Interchange , also known as the "Commuters' Complex". This southernmost portion is named the Santa Ana Freeway , inheriting that title as
546-675: A 14-mile (23 km) undivided freeway through Redwood National and State Parks running inland east of the Prairie Creek Redwoods State Park boundary. The freeway narrows to one lane in each direction at the Klamath River before losing its freeway designation in Klamath . The original placement of the highway near giant Coast Redwoods led to increased awareness of the destruction of the redwoods after decades of extensive logging, which ultimately led to
728-425: A banner such as alternate or bypass —are also managed by AASHTO. These are sometimes designated with lettered suffixes, like A for alternate or B for business. The official route log, last published by AASHTO in 1989, has been named United States Numbered Highways since its initial publication in 1926. Within the route log, "U.S. Route" is used in the table of contents, while "United States Highway" appears as
910-465: A business exodus from Downtown Los Angeles since the COVID-19 pandemic , the city's urban core is evolving as a cultural center with the world's largest showcase of architecture designed by Frank Gehry . On September 4, 1781, a group of 44 settlers known as " Los Pobladores " founded the pueblo (town) they called El Pueblo de Nuestra Señora la Reina de los Ángeles , 'The Town of Our Lady
1092-521: A distinctively-shaped white shield with large black numerals in the center. Often, the shield is displayed against a black square or rectangular background. Each state manufactures their own signage, and as such subtle variations exist all across the United States. Individual states may use cut-out or rectangular designs, some have black outlines, and California prints the letters "US" above the numerals. One- and two-digit shields generally feature
1274-529: A four-lane highway to a six-lane freeway. SR 166 joins US 101 for about 3 miles (4.8 km) before splitting just north of the city limits, while US 101 continues as a four-lane freeway before reverting to expressway status north of Nipomo. Farther north, SR 1 rejoins US 101 between Pismo Beach and San Luis Obispo . Then US 101 takes an inland route through the Salinas Valley , while Highway 1 heads northwest, running along
1456-667: A high bluff north of the Mad River . As the highway reaches Clam Beach (a county park), motorists get their first magnificent full view of the Pacific Ocean north of the Golden Gate. North of Trinidad , the highway narrows to one lane in each direction after crossing Big Lagoon to pass inland of Stone Lagoon and follow the coastal bar between Freshwater Lagoon and the Pacific Ocean south of Orick . It becomes
1638-623: A main route. Odd numbers generally increase from east to west; U.S. Route 1 (US 1) follows the Atlantic Coast and US 101 follows the Pacific Coast. (US 101 is one of the many exceptions to the standard numbering grid; its first "digit" is "10", and it is a main route on its own and not a spur of US 1.) Even numbers tend to increase from north to south; US 2 closely follows the Canadian border, and US 98 hugs
1820-627: A north–south alignment. About one mile (1.6 km) north of this point, the northbound lanes pass through the Gaviota Tunnel . A few miles north of the Gaviota Tunnel, SR 1 splits from US 101 and heads northwest, running along the Pacific coastline parallel and to the west of US 101. US 101 passes through Buellton , Los Alamos , Orcutt , Santa Maria , and Nipomo . South of Santa Maria, US 101 widens from
2002-399: A part of popular culture. US 101 continues east and then south to end at Olympia, Washington . The western terminus of US 2 is now at Everett, Washington . Los Angeles Los Angeles , often referred to by its initials L.A. , is the most populous city in the U.S. state of California . With an estimated 3,820,914 residents within the city limits as of 2023 , it is
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#17327808162362184-713: A part of the U.S. Numbered System." U.S. Route 3 (US 3) meets this obligation; in New Hampshire , it does not follow tolled portions of the Everett Turnpike . However, US Routes in the system do use parts of five toll roads: U.S. Routes in the contiguous United States follow a grid pattern, in which odd-numbered routes run generally north to south and even-numbered routes run generally east to west, though three-digit spur routes can be either-or. Usually, one- and two-digit routes are major routes, and three-digit routes are numbered as shorter spur routes from
2366-485: A profit; the other, according to an analysis of contemporary newspaper reports, was the 1932 Summer Olympics , also held in Los Angeles. Racial tensions erupted on April 29, 1992, with the acquittal by a Simi Valley jury of four Los Angeles Police Department (LAPD) officers captured on videotape beating Rodney King , culminating in large-scale riots . In 1994, the magnitude 6.7 Northridge earthquake shook
2548-602: A rough grid. Major routes from the earlier map were assigned numbers ending in 0, 1 or 5 (5 was soon relegated to less-major status), and short connections received three-digit numbers based on the main highway from which they spurred. The five-man committee met September 25, and submitted the final report to the Joint Board secretary on October 26. The board sent the report to the Secretary of Agriculture on October 30, and he approved it November 18, 1925. The new system
2730-460: A short, 2-mile (3 km) expressway just north of Stafford . A short freeway then runs through Rio Dell before another short, 3-mile (5 km) expressway. Shortly before reaching the western terminus of SR 36 , US 101 becomes a freeway again between Fortuna and Eureka . North of Humboldt Hill , the road enters the City of Eureka (a potential new freeway cutting through or bypass of
2912-507: A single type, where industrial uses were prohibited. The proscriptions included barns, lumber yards, and any industrial land use employing machine-powered equipment. These laws were enforced against industrial properties after the fact. These prohibitions were in addition to existing activities that were already regulated as nuisances. These included explosives warehousing, gas works, oil drilling, slaughterhouses, and tanneries . Los Angeles City Council also designated seven industrial zones within
3094-539: A two-lane road. North of Laytonville , US 101 ascends Rattlesnake summit (1,796 feet or 547 metres) before a descent to follow the South Fork Eel River and Eel River all the way to Fortuna near the mouth of the river. About 12 miles (19 km) northwest of Laytonville, US 101 becomes an undivided freeway near the community of Cummings. SR 271 is the old portion of US 101 through this area. At Leggett, US 101 meets SR 1 for
3276-438: Is Mount San Antonio , locally known as Mount Baldy, which reaches 10,064 feet (3,068 m). Further afield, the highest point in southern California is San Gorgonio Mountain , 81 miles (130 km) east of downtown Los Angeles, with a height of 11,503 feet (3,506 m). The Los Angeles River , which is largely seasonal, is the primary drainage channel . It was straightened and lined in 51 miles (82 km) of concrete by
3458-722: Is a common problem in this population. Although Serieys et al. 2014 find selection of immune genetics at several loci they do not demonstrate that this produces a real difference which helps the bobcats to survive future mange outbreaks . Los Angeles is subject to earthquakes because of its location on the Pacific Ring of Fire . The geologic instability has produced numerous faults , which cause approximately 10,000 earthquakes annually in Southern California, though most of them are too small to be felt. The strike-slip San Andreas Fault system, which sits at
3640-637: Is a north–south route, unlike its parent US 22 , which is east–west. As originally assigned, the first digit of the spurs increased from north to south and east to west along the parent; for example, US 60 had spurs, running from east to west, designated as US 160 in Missouri , US 260 in Oklahoma , US 360 in Texas , and US 460 and US 560 in New Mexico . As with
3822-656: Is a sprawling metropolis of over 18.3 million residents. The majority of the city proper lies in a basin in Southern California adjacent to the Pacific Ocean in the west and extending partly through the Santa Monica Mountains and north into the San Fernando Valley , with the city bordering the San Gabriel Valley to its east. It covers about 469 square miles (1,210 km ), and is the county seat of Los Angeles County , which
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#17327808162364004-436: Is a spur off US 64 . Some divided routes , such as US 19E and US 19W , exist to provide two alignments for one route. Special routes, which can be labeled as alternate, bypass or business, depending on the intended use, provide a parallel routing to the mainline U.S. Highway. Before the U.S. Routes were designated, auto trails designated by auto trail associations were the main means of marking roads through
4186-581: Is also a safety corridor, is named the "Michael J. Burns Freeway," in honor of the State Senator who was a proponent of California's Highways. The highway becomes an unobstructed freeway south of the center of Arcata. Proceeding north it passes the junction for SR 299 (also the western terminus for that route), in the Valley West (northernmost) part of the college town. The highway continues north as it skirts westerly around McKinleyville on
4368-673: Is also used on the bridge, and they can be paid by either a FasTrak transponder or license plate tolling . The high-occupancy vehicle (HOV) lane leading to the bridge requires a car with three or more people. The US 101 Highway is part of the auto tour route of the Juan Bautista de Anza National Historic Trail , a National Park Service unit in the United States National Historic Trail and National Millennium Trail programs. In 2005, Caltrans began posting signs on roads that overlap with
4550-903: Is called the James Lick Freeway , named for James Lick , a philanthropist , from the San Francisco county/city line, through the interchange with I-280 at the Alemany Maze , until the junction with the San Francisco Skyway ( I-80 ) and the Central Freeway near the city's Civic Center . US 101 continues in a northwestern direction on the Central Freeway, and then leaves the freeway, on Mission Street (northbound) and South Van Ness Avenue (southbound), to run north on Van Ness Avenue . At
4732-641: Is co-administered by the Santa Clara Valley Transportation Authority (VTA) while the segment in San Mateo County is co-administered by the separate San Mateo County Express Lanes Joint Powers Authority, and so drivers will see separate toll charges when using each segment. Tolls are collected only for southbound traffic on the Golden Gate Bridge headed to San Francisco. Fully electronic tolling
4914-452: Is complicated by rugged terrain, which has necessitated having different grids for each of the valleys that Los Angeles covers. Major streets are designed to move large volumes of traffic through many parts of the city, many of which are extremely long; Sepulveda Boulevard is 43 miles (69 km) long, while Foothill Boulevard is over 60 miles (97 km) long, reaching as far east as San Bernardino. Drivers in Los Angeles suffer from one of
5096-643: Is designated as the Royal Road or El Camino Real . The commemorative route connects the former Alta California 's 21 missions . A former route of the highway over the Gabilan Range on the San Juan Grade to San Juan Bautista was bypassed in a 1932 realignment. Instead, shortly after leaving Salinas, US 101 joins SR 156 in Prunedale for about eight miles (13 km) as it crosses
5278-437: Is divided into many different districts and neighborhoods, some of which had been separately incorporated cities that eventually merged with Los Angeles. These neighborhoods were developed piecemeal, and are well-defined enough that the city has signage which marks nearly all of them. The city's street patterns generally follow a grid plan , with uniform block lengths and occasional roads that cut across blocks. However, this
5460-502: Is expected to continue to drop in the coming years because of aggressive steps to reduce it, which include electric and hybrid cars, improvements in mass transit , and other measures. The number of Stage 1 smog alerts in Los Angeles has declined from over 100 per year in the 1970s to almost zero in the new millennium. Despite improvement, the 2006 and 2007 annual reports of the American Lung Association ranked
5642-582: Is from: (a) Route 5 near Seventh Street in Los Angeles to Route 1 , Funston approach, and, subject to Section 72.1, the approach to the Golden Gate Bridge in the Presidio of San Francisco via Santa Barbara , San Luis Obispo , and Salinas . (b) A point in Marin County opposite San Francisco to the Oregon state line via Crescent City . The definition purposely omits the segment crossing
U.S. Route 101 in California - Misplaced Pages Continue
5824-772: Is in the process of eliminating all intrastate U.S. Highways less than 300 miles (480 km) in length "as rapidly as the State Highway Department and the Standing Committee on Highways of the American Association of State Highway and Transportation Officials can reach agreement with reference thereto". New additions to the system must serve more than one state and "substantially meet the current AASHTO design standards ". A version of this policy has been in place since 1937. The original major transcontinental routes in 1925, along with
6006-670: Is most common in the San Fernando Valley where the local E/W signing does not match the Caltrans' proper statewide N/S designation. After the Conejo Grade , which is a 7% grade incline, the freeway enters the Oxnard Plain and runs concurrent with SR 1 for the first time. Upon reaching Ventura, there is an interchange with SR 126, which runs east to Santa Clarita . North of Santa Barbara, US 101 switches intermittently between freeway and expressway status (i.e. there
6188-467: Is occasional cross-traffic), but there are no traffic signals until San Francisco . From Ventura and through Santa Barbara , US 101 closely follows the Gaviota Coast (generally no more than one to two miles [1.6 to 3.2 km] from the shore ) until Gaviota State Park , about 23 miles (37 km) west of Goleta . At Gaviota State Park, the highway shifts back from an east–west highway to
6370-647: Is part of I-5 and Palomar Airport Road. It follows I-5 from Coast Highway (former Hill Street exit) in Oceanside to Palomar Airport Road in Carlsbad. From there the US ;101 bypass went onto Palomar Airport Road to merge with US 101 Bus. on Carlsbad Boulevard. As it approached the Coast Highway/SR ;76 exit on southbound I-5 in Oceanside, US 101 Bus. split off. US 101 Bus. followed
6552-488: Is rich in native plant species partly because of its diversity of habitats, including beaches, wetlands , and mountains. The most prevalent plant communities are coastal sage scrub , chaparral shrubland, and riparian woodland . Native plants include: the California poppy , matilija poppy , toyon , Ceanothus , Chamise , Coast Live Oak , sycamore , willow and Giant Wildrye . Many of these native species, such as
6734-448: Is the most populous county in the United States with an estimated 9.86 million residents as of 2022 . It is the third-most visited city in the U.S. with over 2.7 million visitors as of 2023. The area that became Los Angeles was originally inhabited by the indigenous Tongva people and later claimed by Juan Rodríguez Cabrillo for Spain in 1542. The city was founded on September 4, 1781, under Spanish governor Felipe de Neve , on
6916-413: The 1916 New York City Zoning Ordinance did. Second, the residential zones did not distinguish types of housing; they treated apartments, hotels, and detached-single-family housing equally. In 1910, Hollywood merged into Los Angeles, with 10 movie companies already operating in the city at the time. By 1921, more than 80 percent of the world's film industry was concentrated in L.A. The money generated by
7098-805: The Army Corps of Engineers to act as a flood control channel. The river begins in the Canoga Park district of the city, flows east from the San Fernando Valley along the north edge of the Santa Monica Mountains, and turns south through the city center, flowing to its mouth in the Port of Long Beach at the Pacific Ocean. The smaller Ballona Creek flows into the Santa Monica Bay at Playa del Rey . Los Angeles
7280-826: The Federal Highway Administration . Portions of US 101 are eligible to be included in the State Scenic Highway System . It is officially designated as a scenic highway by the California Department of Transportation (Caltrans) from Goleta to Las Cruces in Santa Barbara County , and through Del Norte Coast Redwoods State Park in Del Norte County . This designation means that there are substantial sections of highway passing through
7462-693: The Four Level Interchange . From here, US 101 becomes the Hollywood Freeway . It then passes through the L.A. neighborhoods of Echo Park , Silver Lake , and Los Feliz and heads to Hollywood and up through the Cahuenga Pass before reaching the San Fernando Valley . US 101 passes right next to the Universal Studios Hollywood and then intersects with SR 134 and SR 170 at
U.S. Route 101 in California - Misplaced Pages Continue
7644-578: The Golden Gate Bridge , as it is maintained by the Golden Gate Bridge, Highway and Transportation District and is not part of the state highway system. As a result, there is no US 101 or SR 1 signage on the bridge. US 101 is part of the California Freeway and Expressway System , and is part of the National Highway System , a network of highways that are considered essential to the country's economy, defense, and mobility by
7826-688: The Gulf Freeway carried US 75 , the Pasadena Freeway carried US 66 , and the Pulaski Skyway carries US 1 and US 9 . The Federal Aid Highway Act of 1956 appropriated funding for the Interstate Highway System, to construct a vast network of freeways across the country. By 1957, AASHO had decided to assign a new grid to the new routes, to be numbered in the opposite directions as
8008-547: The Hillside Stranglers murder cases in 1977–1978. In early 1984, the city surpassed Chicago in population, thus becoming the second largest city in the United States. In 1984, the city hosted the Summer Olympic Games for the second time . Despite being boycotted by 14 Communist countries , the 1984 Olympics became more financially successful than any previous, and the second Olympics to turn
8190-436: The Los Angeles sunflower , have become so rare as to be considered endangered. Mexican Fan Palms , Canary Island Palms , Queen Palms , Date Palms , and California Fan Palms are common in the Los Angeles area, although only the last is native to California, though still not native to the City of Los Angeles. Los Angeles has a number of official flora: The city has an urban population of bobcats ( Lynx rufus ). Mange
8372-593: The Mission San Gabriel Arcángel , the first mission in the area. On September 4, 1781, a group of 44 settlers known as " Los Pobladores " founded the pueblo (town) they called El Pueblo de Nuestra Señora la Reina de los Ángeles , 'The Town of Our Lady the Queen of the Angels';. The present-day city has the largest Roman Catholic archdiocese in the United States. Two-thirds of
8554-618: The New England states got together to establish the six-state New England Interstate Routes . Behind the scenes, the federal aid program had begun with the passage of the Federal Aid Road Act of 1916 , providing 50% monetary support from the federal government for improvement of major roads. The Federal Aid Highway Act of 1921 limited the routes to 7% of each state's roads, while 3 in every 7 roads had to be "interstate in character". Identification of these main roads
8736-486: The Pacific coast . Many local disputes arose related to the committee's choices between designation of two roughly equal parallel routes, which were often competing auto trails. At their January meeting, AASHO approved the first two of many split routes (specifically US 40 between Manhattan, Kansas and Limon, Colorado and US 50 between Baldwin City, Kansas and Garden City, Kansas ). In effect, each of
8918-499: The Russian River canyon and eventually a two-lane road south of Hopland , the first time since leaving San Francisco . Just before reaching Ukiah , US 101 becomes a four-lane freeway. In the community of Calpella, SR 20 merges with US 101 for the next 15.5 miles (24.9 km) to Willits . The freeway portion ends as the combined US 101 and SR 20 ascend the 1,956-foot (596 m) Ridgewood Summit ,
9100-556: The Russian River in Healdsburg and then following the river up the Alexander Valley . SR 128 joins US 101 in the town of Geyserville before splitting just north of Cloverdale . US 101 then heads up a steep hill just before leaving Sonoma County and entering Mendocino County . US 101 crosses into Mendocino County as a freeway for one mile (1.6 km), but then narrows to an expressway through
9282-434: The San Benito County line, SR 156 splits from US 101 near San Juan Bautista while US 101 continues northward mostly as a four-lane highway until it reaches Gilroy . US 101 crosses the Pajaro River into Santa Clara County as a four-lane highway, with an interchange at SR 25 a few miles later. Upon reaching Gilroy , it becomes the South Valley Freeway (as in South Santa Clara Valley ), and at
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#17327808162369464-463: The San Francisco Bay Area , and the North Coast (Redwood Empire) . Generally referred to as "101" by residents of Northern California , in Southern California it is often called "The 101" (pronounced "the one oh one"). The highway has portions designated as the Santa Ana Freeway , the Hollywood Freeway , the Ventura Freeway , South Valley Freeway, and Bayshore Freeway , as well as El Camino Real in many non-freeway segments. The Redwood Highway ,
9646-408: The San Francisco Board of Supervisors voted to remove the remainder of the Central Freeway and most other proposed freeways from the city's highway plan. For decades, southbound traffic on US 101 flowed on the one-way Turk Street from Van Ness Avenue to the Central Freeway, while northbound traffic used the parallel Golden Gate Avenue. After the 1989 Loma Prieta earthquake damaged the structure,
9828-406: The Spanish Empire in 1542, while on an official military exploring expedition, as he was moving northward along the Pacific coast from earlier colonizing bases of New Spain in Central and South America. Gaspar de Portolà and Franciscan missionary Juan Crespí reached the present site of Los Angeles on August 2, 1769. In 1771, Franciscan friar Junípero Serra directed the building of
10010-460: The Surface Transportation Assistance Act (STAA) are prohibited through the park. Just after the park boundary, the highway switches to a short undivided freeway and then eventually a divided freeway just before reaching Garberville . North of Garberville, US 101 reverts to an undivided freeway, which continuing north by northwest, passes through the 53,000-acre (210 km) Humboldt Redwoods State Park , California's third largest State Park and
10192-415: The auto trails which they roughly replaced, were as follows: US 10, US 60, and US 90 only ran about two thirds of the way across the country, while US 11 and US 60 ran significantly diagonally. US 60's violation of two of the conventions would prove to be one of the major sticking points; US 60 eventually was designated as US 66 in 1926, and later it became
10374-423: The second-most populous city in the United States, behind only New York City ; it is also the commercial, financial and cultural center of Southern California . Los Angeles has an ethnically and culturally diverse population, and is the principal city of a metropolitan area of 12.8 million people (2023). Greater Los Angeles , which includes the Los Angeles and Riverside–San Bernardino metropolitan areas,
10556-398: The siege of Los Angeles where 150 Mexican militias fought the occupiers which eventually surrendered. Mexican rule ended during following the American Conquest of California , part of the larger Mexican-American War . Americans took control from the Californios after a series of battles, culminating with the signing of the Treaty of Cahuenga on January 13, 1847. The Mexican Cession
10738-416: The 1890s brought rapid growth to the city. The city was further expanded with the completion of the Los Angeles Aqueduct in 1913, which delivers water from Eastern California . Los Angeles has a diverse economy with a broad range of industries. Despite a steep exodus of film and television production since the COVID-19 pandemic , Los Angeles is still one of the largest hubs of American film production ,
10920-537: The 1930s, / l ɔː s ˈ æ n dʒ əl ə s / has been most common. In 1934, the United States Board on Geographic Names decreed that this pronunciation be used by the federal government. This was also endorsed in 1952 by a "jury" appointed by Mayor Fletcher Bowron to devise an official pronunciation. Common pronunciations in the United Kingdom include / l ɒ s ˈ æ n dʒ ɪ l iː z , - l ɪ z , - l ɪ s / loss AN -jil-eez, -iz, -iss . Phonetician Jack Windsor Lewis described
11102-409: The 1940s and 1950s to adopt the same number as the U.S. Route they connected to – mostly in the western provinces. Examples include British Columbia 's highways 93 , 95 , 97 , and 99 ; Manitoba 's highways 59 , 75 , and 83 ; or Ontario King's Highway 71 . The reverse happened with U.S. Route 57 , originally a Texas state highway numbered to match Mexican Federal Highway 57 . In the 1950s,
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#173278081623611284-499: The 1970s (the SR 87/I-280 interchange also had this at the same time). It became the butt of many local jokes. The highlight prank occurred in January 1976, when a 1960 Chevrolet Impala was placed on the highest bridge overnight, where it obviously would be impossible to drive. The following day, San Jose City Councilman Joe Colla was photographed standing next to the car, a photo which was circulated across many newspapers. It has been suggested this stunt helped lead to funding to complete
11466-456: The 20th century, Los Angeles substantially reduced the amount of housing that could be built by drastically downzoning the city. In 1960, the city had a total zoned capacity for approximately 10 million people. By 1990, that capacity had fallen to 4.5 million as a result of policy decisions to ban housing through zoning. Racial tensions led to the Watts riots in 1965, resulting in 34 deaths and over 1,000 injuries. In 1969, California became
11648-401: The 350-mile-long (560 km) northernmost segment of the highway, begins at the Golden Gate and passes through the world's tallest and only extensive preserves of virgin, old-growth coast redwood trees. The entirety of US 101 in California is designated as Route 101 in the state highway system, and is defined as such in section 401 of the California Streets and Highways Code: Route 101
11830-431: The City of Los Angeles from selling or providing water from the aqueduct to any area outside its borders, many adjacent cities and communities felt compelled to join Los Angeles. Los Angeles created the first municipal zoning ordinance in the United States. On September 14, 1908, the Los Angeles City Council promulgated residential and industrial land use zones. The new ordinance established three residential zones of
12012-461: The East Los Angeles Interchange in Los Angeles and the Mexican border in San Ysidro. This freeway construction by the California Department of Public Works put US 101 on an all new highway route alignment to relieve Oceanside and Carlsbad of their very heavy bumper-to-bumper burdensome traffic problem. Also before the bypass in the 1950s, US 101 followed North Coast Highway (formerly Hill Street) from San Luis Rey Mission Expressway (SR 76 and north end of
12194-408: The Golden Gate Bridge" and then resumes at "a point in Marin County opposite San Francisco" to the Oregon state line. The bridge itself is maintained by the Golden Gate Bridge, Highway and Transportation District instead of Caltrans . From the 1940s to 1991, various segments of US 101 between Los Angeles and San Francisco were upgraded to either a freeway or expressway. In the Los Angeles area,
12376-460: The Golden Gate Bridge, US 101 enters Marin County and is known as the Redwood Highway. After crossing the bridge, US 101 climbs the Waldo Grade and passes through the Robin Williams Tunnel , the only one of its kind in 300 miles (480 km) (the other being the Gaviota Tunnel in Santa Barbara County ). Upon exiting the tunnel, it passes above the hillside town of Sausalito and descends to Richardson Bay , where SR 1 splits from
12558-425: The Gulf Coast. The longest routes connecting major cities are generally numbered to end in a 1 or a 0; however, extensions and truncations have made this distinction largely meaningless. These guidelines are very rough, and exceptions to all of the basic numbering rules exist. The numbering system also extended beyond the borders of the United States in an unofficial manner. Many Canadian highways were renumbered in
12740-435: The HOT lanes is required to carry either a FasTrak Flex or CAV (Clean Air Vehicle) transponder, with its switch set to indicate the number of the vehicle's occupants (1, 2, or 3 or more). Solo drivers may also use the FasTrak standard tag without the switch. Drivers without any FasTrak tag will be assessed a toll violation regardless of whether they qualified for free. The segment of the express lanes in Santa Clara County
12922-500: The HOT lanes' hours of operation is weekdays between 5:00 am and 8:00 pm. Solo drivers are tolled using a congestion pricing system based on the real-time levels of traffic. Two-person carpools and clean air vehicles with a solo driver are charged 50 percent of the posted toll. Carpools with three or more people and motorcycles are not charged. All tolls are collected using an open road tolling system, and therefore there are no toll booths to receive cash. Each vehicle using
13104-640: The Hollywood Split, US 101 is an east–west highway (until it reaches Gaviota State Park in Santa Barbara County where it shifts back to a north–south alignment). It meets with I-405 in Sherman Oaks. The east–west geographical alignment of the Ventura Freeway and the north–south designation which appears on the freeway signs can be confusing to visitors; the same freeway entrance can often be signed as "101 North" and "101 West"; this
13286-625: The Los Angeles area and the San Francisco Bay Area follow El Camino Real , the commemorative route connecting the former Alta California 's 21 missions . Although the highway has been superseded in overall importance for transportation through the state by Interstate 5 (I-5), US 101 continues to be the major coastal north–south route that links the Greater Los Angeles Area , the Central Coast ,
13468-629: The Los Angeles area include the 1933 Long Beach , 1971 San Fernando , 1987 Whittier Narrows , and the 1994 Northridge events. All but a few are of low intensity and are not felt. The USGS has released the UCERF California earthquake forecast , which models earthquake occurrence in California. Parts of the city are also vulnerable to tsunamis ; harbor areas were damaged by waves from Aleutian Islands earthquake in 1946, Valdivia earthquake in 1960, Alaska earthquake in 1964, Chile earthquake in 2010 and Japan earthquake in 2011. The city
13650-502: The Los Angeles area was the headquarters of six of the country's major aircraft manufacturers ( Douglas Aircraft Company , Hughes Aircraft , Lockheed , North American Aviation , Northrop Corporation , and Vultee ). During the war, more aircraft were produced in one year than in all the pre-war years since the Wright brothers flew the first airplane in 1903, combined. Manufacturing in Los Angeles skyrocketed, and as William S. Knudsen , of
13832-685: The Los Angeles/Long Beach port complex, Los Angeles suffers from air pollution in the form of smog. The Los Angeles Basin and the San Fernando Valley are susceptible to atmospheric inversion , which holds in the exhausts from road vehicles, airplanes, locomotives, shipping, manufacturing, and other sources. The smog season lasts from approximately May to October. While other large cities rely on rain to clear smog, Los Angeles gets only 15 inches (380 mm) of rain each year: pollution accumulates over many consecutive days. Issues of air quality in Los Angeles and other major cities led to
14014-489: The Mexican or ( New Spain ) settlers were mestizo or mulatto , a mixture of African, indigenous and European ancestry. The settlement remained a small ranch town for decades, but by 1820, the population had increased to about 650 residents. Today, the pueblo is commemorated in the historic district of Los Angeles Pueblo Plaza and Olvera Street , the oldest part of Los Angeles. New Spain achieved its independence from
14196-523: The National Defense Advisory Commission put it, "We won because we smothered the enemy in an avalanche of production, the like of which he had never seen, nor dreamed possible." After the end of World War II Los Angeles grew more rapidly than ever, sprawling into the San Fernando Valley . The expansion of the state owned Interstate Highway System during the 1950s and 1960s helped propel suburban growth and signaled
14378-601: The Northeast, New York held out for fewer routes designated as US highways. The Pennsylvania representative, who had not attended the local meetings, convinced AASHO to add a dense network of routes, which had the effect of giving six routes termini along the state line. (Only US 220 still ends near the state line, and now it ends at an intersection with future I-86 .) Because US 20 seemed indirect, passing through Yellowstone National Park , Idaho and Oregon requested that US 30 be swapped with US 20 to
14560-619: The Oceanside–Carlsbad freeway bypass) to Harbor Drive. From there it followed Harbor Drive to Vandergrift Boulevard, San Rafael Drive, and the freeway onramp for I-5 north near the Camp Pendleton north entrance guardhouse gate. It merges with the I-5 northbound onramp to shoot onto the southbound lanes of I-5 to follow the freeway lanes all the way to Las Pulgas Road in Camp Pendleton. An old orphaned alignment of US 101, that ran through
14742-546: The Pacific coastline in California, parallel and to the west of US 101. A steep segment (7% grade) between San Luis Obispo and Atascadero is known as the Cuesta Grade . North of Atascadero, the highway joins SR 46 for about three miles (4.8 km) through Paso Robles . From Paso Robles to Salinas , US 101 is an expressway known as the Salinas River Valley Highway, since
14924-571: The Queen of the Angels'. The original name of the settlement is disputed; the Guinness Book of World Records rendered it as "El Pueblo de Nuestra Señora la Reina de los Ángeles del Río Porciúncula "; other sources have shortened or alternate versions of the longer name. The local English pronunciation of the name of the city has varied over time. A 1953 article in the journal of the American Name Society asserts that
15106-1052: The Salinas River Valley extends from Santa Margarita to the SR ;156 junction in Prunedale . US 101 resumes freeway status between San Miguel and King City , bypassing the smaller towns of Camp Roberts , Bradley , and San Ardo , as well as the San Ardo Oil Field about five miles (8.0 km) south of San Ardo. Near this point, the wide agricultural bottomlands of the Salinas Valley begins. North of King City, US 101 once again switches intermittently between freeway and expressway status, passing through Greenfield , Soledad , Gonzales , and Chualar before reaching Salinas. Shortly after leaving Salinas, US 101 joins SR 156 in Prunedale for about eight miles (13 km). After crossing
15288-696: The San Fernando Valley. Other hilly parts of Los Angeles include the Mt. Washington area north of Downtown, eastern parts such as Boyle Heights , the Crenshaw district around the Baldwin Hills , and the San Pedro district. Surrounding the city are much higher mountains. Immediately to the north lie the San Gabriel Mountains , which is a popular recreation area for Angelenos. Its high point
15470-519: The San Francisco Bay Area, US 101 was originally divided. US 101W followed the same general right-of-way of today's US 101 through the region, primarily along what was originally signed as Bayshore Boulevard. US 101E then generally followed the right-of-way taken by today's I-880 from San Jose to Oakland, then across the Carquinez Bridge to follow what is now SR 37 , joining US 101W. The US 101E designation
15652-527: The Southern Californian coast, is subject to a late spring/early summer weather phenomenon called " June Gloom ". This involves overcast or foggy skies in the morning that yield to sun by early afternoon. More recently, statewide droughts in California have further strained the city's water security . Downtown Los Angeles averages 14.67 in (373 mm) of precipitation annually, mainly occurring between November and March, generally in
15834-475: The Spanish Empire in 1821, and the pueblo now existed within the new Mexican Republic . During Mexican rule, Governor Pío Pico made Los Angeles the regional capital of Alta California . By this time, the new republic introduced more secularization acts within the Los Angeles region. In 1846, during the wider Mexican-American war , marines from the United States occupied the pueblo. This resulted in
16016-425: The U.S. Highway System remains in place to this day and new routes are occasionally added to the system. In general, U.S. Routes do not have a minimum design standard, unlike the later Interstate Highways , and are not usually built to freeway standards. Some stretches of U.S. Routes do meet those standards. Many are designated using the main streets of the cities and towns through which they run. New additions to
16198-752: The U.S. Highway grid. Though the Interstate numbers were to supplement—rather than replace—the U.S. Route numbers, in many cases (especially in the West ) the US highways were rerouted along the new Interstates. Major decommissioning of former routes began with California 's highway renumbering in 1964 . The 1985 removal of US 66 is often seen as the end of an era of US highways. A few major connections not served by Interstate Highways include US 6 from Hartford, Connecticut, to Providence, Rhode Island and US 93 from Phoenix, Arizona to Las Vegas, Nevada, though
16380-535: The US Highway system, three-digit numbers are assigned to spurs of one or two-digit routes. US 201 , for example, splits from US 1 at Brunswick, Maine , and runs north to Canada. Not all spurs travel in the same direction as their "parents"; some are connected to their parents only by other spurs, or not at all, instead only traveling near their parents, Also, a spur may travel in different cardinal directions than its parent, such as US 522 , which
16562-477: The US highway, which did not end in zero, but was still seen as a satisfyingly round number. Route 66 came to have a prominent place in popular culture, being featured in song and films. With 32 states already marking their routes, the plan was approved by AASHO on November 11, 1926. This plan included a number of directionally split routes, several discontinuous routes (including US 6 , US 19 and US 50 ), and some termini at state lines. By
16744-650: The United States. These were private organizations, and the system of road marking at the time was haphazard and not uniform. In 1925, the Joint Board on Interstate Highways , recommended by the American Association of State Highway Officials (AASHO), worked to form a national numbering system to rationalize the roads. After several meetings, a final report was approved by the U.S. Department of Agriculture in November 1925. After getting feedback from
16926-480: The approval of the states along the former US 60. But Missouri and Oklahoma did object—Missouri had already printed maps, and Oklahoma had prepared signs. A compromise was proposed, in which US 60 would split at Springfield, Missouri , into US 60E and US 60N, but both sides objected. The final solution resulted in the assignment of US 66 to the Chicago-Los Angeles portion of
17108-405: The auto trail associations were not able to formally address the meetings. However, as a compromise, they talked with the Joint Board members. The associations finally settled on a general agreement with the numbering plans, as named trails would still be included. The tentative system added up to 81,000 miles (130,000 km), 2.8% of the public road mileage at the time. The second full meeting
17290-769: The birthplace of the Internet, as the first ARPANET transmission was sent from the University of California, Los Angeles (UCLA) to the Stanford Research Institute in Menlo Park . In 1973, Tom Bradley was elected as the city's first African American mayor, serving for five terms until retiring in 1993. Other events in the city during the 1970s included the Symbionese Liberation Army 's South Central standoff in 1974 and
17472-632: The boundary between the Pacific Plate and the North American Plate , passes through the Los Angeles metropolitan area. The segment of the fault passing through Southern California experiences a major earthquake roughly every 110 to 140 years, and seismologists have warned about the next "big one", as the last major earthquake was the 1857 Fort Tejon earthquake . The Los Angeles basin and metropolitan area are also at risk from blind thrust earthquakes . Major earthquakes that have hit
17654-485: The boundary of a Mediterranean climate ( Köppen : Csb on the coast, Csa otherwise). Daytime temperatures are generally temperate all year round. In winter, they average around 68 °F (20 °C). Autumn months tend to be hot, with major heat waves a common occurrence in September and October, while the spring months tend to be cooler and experience more precipitation. Los Angeles has plenty of sunshine throughout
17836-533: The cities of Mission Viejo, Laguna Niguel, San Juan Capistrano, Dana Point, and San Clemente, was located in south Orange County. The old roadway, from a dead end just west of I-5 and east of the railroad tracks in Mission Viejo to Cristianitos Road in San Clemente, followed Camino Capistrano, Doheny Park Road, Coast Highway and El Camino Real. It had interchanges with I-5 and California State Route 1. It
18018-404: The city as the most polluted in the country with short-term particle pollution and year-round particle pollution. In 2008, the city was ranked the second most polluted and again had the highest year-round particulate pollution. The city met its goal of providing 20 percent of the city's power from renewable sources in 2010. The American Lung Association's 2013 survey ranks the metro area as having
18200-537: The city is 342 miles (550 km). Los Angeles is both flat and hilly. The highest point in the city proper is Mount Lukens at 5,074 ft (1,547 m), located in the foothills of the San Gabriel Mountains at the north extent of the Crescenta Valley . The eastern end of the Santa Monica Mountains stretches from Downtown to the Pacific Ocean and separates the Los Angeles Basin from
18382-455: The city was successfully blocked repeatedly). As the route traverses Eureka, the southern portion is known as "Broadway" and then as it bears east along Humboldt Bay , the Highway is aligned on a one-way couplet (4th and 5th streets). Five miles (8.0 km) later the highway leaves Eureka's northern city limit and continues north. The expressway style section between Eureka and Arcata , which
18564-560: The city, causing $ 12.5 billion in damage and 72 deaths. The century ended with the Rampart scandal , one of the most extensive documented cases of police misconduct in American history. In 2002, Mayor James Hahn led the campaign against secession, resulting in voters defeating efforts by the San Fernando Valley and Hollywood to secede from the city. In 2022 , Karen Bass became the city's first female mayor , making Los Angeles
18746-497: The city. However, between 1908 and 1915, the Los Angeles City Council created various exceptions to the broad proscriptions that applied to these three residential zones, and as a consequence, some industrial uses emerged within them. There are two differences between the 1908 Residence District Ordinance and later zoning laws in the United States. First, the 1908 laws did not establish a comprehensive zoning map as
18928-480: The country's largest oil producer, accounting for about one-quarter of the world's petroleum output. By 1900, the population had grown to more than 102,000, putting pressure on the city's water supply . The completion of the Los Angeles Aqueduct in 1913, under the supervision of William Mulholland , ensured the continued growth of the city. Because of clauses in the city's charter that prevented
19110-450: The county line between Marin and Sonoma Counties. The entire area between Novato and Petaluma is also the voter approved Novato–Petaluma Community Separator, which forbids most development. Upon entering Sonoma County, the freeway widens again to six lanes from the county line to Windsor , passing through Petaluma , Cotati , Rohnert Park , and Santa Rosa . Upon reaching Windsor, the freeway returns to two lanes in each direction, crossing
19292-477: The demise of the city's privately owned electrified rail system , once the world's largest. As a consequence of World War II, suburban growth, and population density, many amusement parks were built and operated in this area. An example is Beverly Park , which was located at the corner of Beverly Boulevard and La Cienega before being closed and substituted by the Beverly Center . In the second half of
19474-617: The difference between the average daily low and the average daily high is over 30 °F (17 °C). The average annual temperature of the sea is 63 °F (17 °C), from 58 °F (14 °C) in January to 68 °F (20 °C) in August. Hours of sunshine total more than 3,000 per year, from an average of 7 hours of sunshine per day in December to an average of 12 in July. Due to
19656-600: The early 1950s, traffic had become very heavy on US 101 through Oceanside and Carlsbad. The US 101 freeway bypass (Oceanside-Carlsbad freeway bypass) was built in 1953 and completed in 1955 by the California Department of Public Works (now Caltrans) and brought up by the San Diego Highway Development Association on a US 80/US 101 discussion on how to resolve the huge traffic loads on US 101 in Oceanside. Today it
19838-524: The era of Spanish colonization). The historic center of Tongva power in the region was the settlement of Yaanga ( Tongva : Iyáangẚ ), meaning "place of the poison oak ", which would one day be the site where the Spanish founded the Pueblo de Los Ángeles . Iyáangẚ has also been translated as "the valley of smoke". Maritime explorer Juan Rodríguez Cabrillo claimed the area of southern California for
20020-614: The establishment of Redwood National Park in 1968. The original highway segment through Prairie Creek Redwoods State Park is now a scenic alternate similar to Avenue of the Giants, named Newton B. Drury Scenic Parkway in honor of the fourth director of the National Park Service and executive director of the Save-the-Redwoods League North of the town of Klamath just inside Del Norte County,
20202-471: The first documented person to drive an automobile from San Francisco to New York using only a connection of dirt roads, cow paths, and railroad beds. His journey, covered by the press, became a national sensation and called for a system of long-distance roads. In the early 1910s, auto trail organizations—most prominently the Lincoln Highway —began to spring up, marking and promoting routes for
20384-567: The first segment of the Hollywood Freeway through the Cahuenga Pass opened in 1940, while the segment from the San Fernando Valley to Downtown Los Angeles opened in 1954, replacing Cahuenga Boulevard. The Ventura Freeway then opened in 1960, replacing Ventura Boulevard . The segment of the original two-lane alignment between Emma Wood State Beach north to the Mobil Pier Undercrossing near Sea Cliff , which followed
20566-407: The form of moderate rain showers, but sometimes as heavy rainfall during winter storms. Rainfall is usually higher in the hills and coastal slopes of the mountains because of orographic uplift. Summer days are usually rainless. Rarely, an incursion of moist air from the south or east can bring brief thunderstorms in late summer, especially to the mountains. The coast gets slightly less rainfall, while
20748-543: The freeway and heads to the coast. US 101 then passes through Mill Valley , Corte Madera , Larkspur , San Rafael and Novato , before entering Sonoma County. The section between Novato in Marin County and Petaluma in Sonoma County changes from its original six or eight lanes through Marin to four lanes, creating a bottleneck, and is thus called the "Novato Narrows" by locals. The Narrows continue up to
20930-484: The freeway. In 2010, the interchange was named the Joe Colla Interchange . United States Numbered Highway System The United States Numbered Highway System (often called U.S. Routes or U.S. Highways ) is an integrated network of roads and highways numbered within a nationwide grid in the contiguous United States . As the designation and numbering of these highways were coordinated among
21112-517: The heading for each route. All reports of the Special Committee on Route Numbering since 1989 use "U.S. Route", and federal laws relating to highways use "United States Route" or "U.S. Route" more often than the "Highway" variants. The use of U.S. Route or U.S. Highway on a local level depends on the state, with some states such as Delaware using "route" and others such as Colorado using "highway". In 1903, Horatio Nelson Jackson became
21294-421: The highest elevation along the route's 808-mile-long (1,300 km) trek through California. As US 101 resumes freeway status just south of Willits, SR 20 splits from US 101 shortly before it suddenly reverts to a 2-lane undivided freeway and eventually a highway north of Willits. US 101 then widens to a four-lane expressway until the intersection with the western portion of SR 162 , where it reverts to
21476-419: The highway closely follows the Pacific coast again. In Crescent City , US 101 once again separates into a one-way couplet (L and M Streets) for nine blocks. As it leaves Crescent City, US 101 becomes a divided freeway for the last time in California (built slightly to the west of the original two-lane alignment, now called Parkway Drive). As the 3-mile divided freeway portion ends, US 101 intersects
21658-402: The historic Rincon Sea Level Road , was the re-signed as part of SR 1 . The last traffic signals along the route between the Los Angeles area and the San Francisco Bay Area were removed in 1991 when the section through downtown Santa Barbara was constructed to freeway standards after years of disagreement over the impact that the original elevated design would have on the community. In
21840-581: The historic 1776 Juan Bautista de Anza trail route, so that California drivers can now follow the trail. Instead of terminating in Los Angeles, US 101 once continued all the way south through San Diego to the Mexico–United States border in San Ysidro . However, this part was decommissioned on July 1, 1964, in favor of I-5 . Though much of U.S. Route 101 has been superseded by I-5, several street segments of former Route 101 exist. Much of
22022-565: The industry kept the city insulated from much of the economic loss suffered by the rest of the country during the Great Depression . By 1930, the population surpassed one million. In 1932, the city hosted the Summer Olympics . During World War II Los Angeles was a major center of wartime manufacturing, such as shipbuilding and aircraft. Calship built hundreds of Liberty Ships and Victory Ships on Terminal Island, and
22204-466: The inland and mountain areas get considerably more. Years of average rainfall are rare. The usual pattern is a year-to-year variability, with a short string of dry years of 5–10 in (130–250 mm) rainfall, followed by one or two wet years with more than 20 in (510 mm). Wet years are usually associated with warm water El Niño conditions in the Pacific, dry years with cooler water La Niña episodes. A series of rainy days can bring floods to
22386-583: The interchange known as the Hollywood Split . Here, the alignment of US 101 shifts to the alignment of SR 134 (i.e. heading northbound, the road's alignment turns left, or westbound) and thereafter is referred to as the Ventura Freeway until it reaches Ventura . Though confusing, the "Hollywood Freeway" name continues northward from this interchange on SR 170, and the "Ventura Freeway" name continues eastward to SR 134. From
22568-505: The intersection of Van Ness Avenue and Lombard Street , US 101 heads west on Lombard Street, and then on Richardson Avenue, entering The Presidio , where it becomes a divided highway again (the Presidio Parkway). It is then joined by Route 1 before approaching and crossing the Golden Gate Bridge . From San Francisco north the highway is heavily traveled by commuters through to Windsor , just north of Santa Rosa . North of
22750-575: The largest U.S. city to have ever had a woman as mayor. Los Angeles will host the 2028 Summer Olympics and Paralympic Games , making Los Angeles the third city to host the Olympics three times. The city of Los Angeles covers a total area of 502.7 square miles (1,302 km ), comprising 468.7 square miles (1,214 km ) of land and 34.0 square miles (88 km ) of water. The city extends for 44 miles (71 km) from north to south and for 29 miles (47 km) from east to west. The perimeter of
22932-692: The last time, and from this point until Piercy, US 101 runs along a section of highway with frequent landslides. Caltrans bypassed the most difficult section in 2009 with unique construction of two bridges known collectively as the Confusion Hill Bridges . This project, funded by an emergency act from the State Legislature, moved the highway across the Eel River away from the troubled spots to prevent disruption in commerce and travel from infrequent, but costly, winter closures on
23114-403: The latter is planned to be upgraded to Interstate 11 . Three state capitals in the contiguous U.S. are served only by U.S. Routes: Dover, Delaware ; Jefferson City, Missouri ; and Pierre, South Dakota . In 1995, the National Highway System was defined to include both the Interstate Highway System and other roads designated as important to the nation's economy, defense, and mobility. AASHTO
23296-490: The lowest is 28 °F (−2 °C), on January 4, 1949. Within the City of Los Angeles, the highest temperature ever officially recorded is 121 °F (49 °C), on September 6, 2020, at the weather station at Pierce College in the San Fernando Valley neighborhood of Woodland Hills . During autumn and winter, Santa Ana winds sometimes bring much warmer and drier conditions to Los Angeles, and raise wildfire risk. Owing to geography, heavy reliance on automobiles, and
23478-514: The lowest numbers in the east and the highest in the west, while east-to-west highways are typically even-numbered, with the lowest numbers in the north, and the highest in the south, though the grid guidelines are not rigidly followed, and many exceptions exist. Major north–south routes generally have numbers ending in "1", while major east–west routes usually have numbers ending in "0". Three-digit numbered highways are generally spur routes of parent highways; for example, U.S. Route 264 (US 264)
23660-505: The lowlands and mudslides to the hills, especially after wildfires have denuded the slopes. Both freezing temperatures and snowfall are extremely rare in the city basin and along the coast, with the last occurrence of a 32 °F (0 °C) reading at the downtown station being January 29, 1979; freezing temperatures occur nearly every year in valley locations while the mountains within city limits typically receive snowfall every winter. The greatest snowfall recorded in downtown Los Angeles
23842-505: The main transportation route to the far North Coast. North of Piercy, the freeway portion again ends and the road narrows down to two lanes, before another stretch of divided highway. Arriving in Humboldt County , another narrow two-lane portion of US 101 bisects Richardson Grove State Park . Because of the narrow lanes and the redwood trees that tower over this segment of the highway, standard-sized trucks in compliance with
24024-483: The more colorful names and historic value of the auto trail systems. The New York Times wrote, "The traveler may shed tears as he drives the Lincoln Highway or dream dreams as he speeds over the Jefferson Highway , but how can he get a 'kick' out of 46, 55 or 33 or 21?" (A popular song later promised, " Get your kicks on Route 66! ") The writer Ernest McGaffey was quoted as saying, "Logarithms will take
24206-530: The most common one, / l ɒ s ˈ æ n dʒ ɪ l iː z / , as a spelling pronunciation based on analogy to Greek words ending in -es , "reflecting a time when the classics were familiar if Spanish was not". The settlement of Indigenous Californians in the modern Los Angeles Basin and the San Fernando Valley was dominated by the Tongva (now also known as the Gabrieleño since
24388-546: The mountainous terrain of the surrounding region, the Los Angeles area contains a large number of distinct microclimates , causing extreme variations in temperature in close physical proximity to each other. For example, the average July maximum temperature at the Santa Monica Pier is 70 °F (21 °C) whereas it is 95 °F (35 °C) in Canoga Park, 15 miles (24 km) away. The city, like much of
24570-759: The mountains further north, through the Prunedale Cutoff. Before the Golden Gate Bridge was completed in 1937, there was regular vehicle ferry service across the Golden Gate strait, running from the Hyde Street Pier to Sausalito . Under the California Streets and Highways Code § 401 , the Golden Gate Bridge is legally not part of US 101. The portion of US 101 starting from Los Angeles ends at "the approach to
24752-483: The name's pronunciation with a hard g ( / ɡ / ), reported that there were at least 12 pronunciation variants. In the early 1900s, the Los Angeles Times advocated for pronouncing it Loce AHNG-hayl-ais ( / l oʊ s ˈ ɑː ŋ h eɪ l eɪ s / ), approximating Spanish [los ˈaŋxeles] , by printing the respelling under its masthead for several years. This did not find favor. Since
24934-516: The new recreation of long-distance automobile travel. The Yellowstone Trail was another of the earliest examples. While many of these organizations worked with towns and states along the route to improve the roadways, others simply chose a route based on towns that were willing to pay dues, put up signs, and did little else. Wisconsin was the first state in the U.S. to number its highways , erecting signs in May 1918. Other states soon followed. In 1922,
25116-419: The northerly extension of the roadway now known as I-5 . US 101 heads north for 2 miles (3.2 km) before merging with the western end of the San Bernardino Freeway (I-10) . After merging with westbound traffic from the San Bernardino Freeway (I-10) , US 101 then proceeds northwest via the Downtown Slot under the northern edge of Los Angeles' Civic Center to State Route 110 (SR 110) at
25298-458: The numbering grid for the new Interstate Highway System was established as intentionally opposite from the US grid insofar as the direction the route numbers increase. Interstate Highway numbers increase from west-to-east and south-to-north, to keep identically numbered routes geographically apart in order to keep them from being confused with one another, and it omits 50 and 60 which would potentially conflict with US 50 and US 60 . In
25480-437: The optional routes into another route. In 1934, AASHO tried to eliminate many of the split routes by removing them from the log, and designating one of each pair as a three-digit or alternate route, or in one case US 37 . AASHO described its renumbering concept in the October 1934 issue of American Highways : "Wherever an alternate route is not suitable for its own unique two-digit designation, standard procedure assigns
25662-405: The original US 101 through downtown Oceanside and Carlsbad as former Hill Street/Carlsbad Boulevard (CR S-21) while the US 101 freeway followed modern I-5 and Palomar Airport Road. The south end of the freeway bypass is Carlsbad Boulevard and Palomar Airport Road and the north end is I-5 and the Coast Highway/SR 76 exit. The south end was modified after US 101 was decommissioned between
25844-404: The other states. Many states agreed in general with the scope of the system, but believed the Midwest to have added too many routes to the system. The group adopted the shield, with few modifications from the original sketch, at that meeting, as well as the decision to number rather than name the routes. A preliminary numbering system, with eight major east–west and ten major north–south routes,
26026-452: The passage of early national environmental legislation, including the Clean Air Act . When the act was passed, California was unable to create a State Implementation Plan that would enable it to meet the new air quality standards, largely because of the level of pollution in Los Angeles generated by older vehicles. More recently, the state of California has led the nation in working to limit pollution by mandating low-emission vehicles . Smog
26208-412: The place of legends, and 'hokum' for history." When the U.S. numbered system was started in 1925, a few optional routings were established which were designated with a suffixed letter after the number indicating "north", "south", "east", or "west". While a few roads in the system are still numbered in this manner, AASHO believes that they should be eliminated wherever possible, by the absorption of one of
26390-423: The pronunciation / l ɔː s ˈ æ n dʒ əl ə s / lawss AN -jəl-əs was established following the 1850 incorporation of the city and that since the 1880s the pronunciation / l oʊ s ˈ æ ŋ ɡ əl ə s / lohss ANG -gəl-əs emerged from a trend in California to give places Spanish, or Spanish-sounding, names and pronunciations. In 1908, librarian Charles Fletcher Lummis , who argued for
26572-491: The rest of the surrounding landscape. Most construction is done in separate units, rather than wall-to-wall . However, Downtown Los Angeles itself has many buildings over 30 stories, with fourteen over 50 stories, and two over 70 stories, the tallest of which is the Wilshire Grand Center . Los Angeles has a two-season semi-arid climate ( Köppen : BSh ) with dry summers and very mild winters, but it receives more annual precipitation than most semi-arid climates, narrowly missing
26754-540: The route and the nominal direction of travel. Second, they are displayed at intersections with other major roads, so that intersecting traffic can follow their chosen course. Third, they can be displayed on large green guide signs that indicate upcoming interchanges on freeways and expressways. Since 1926, some divided routes were designated to serve related areas, and designate roughly-equivalent splits of routes. For instance, US 11 splits into US 11E (east) and US 11W (west) in Bristol, Virginia , and
26936-615: The route in northern San Diego County is County Route S21 ; this includes Coast Highway in Oceanside , Carlsbad Boulevard in Carlsbad , Coast Highway 101 in Encinitas , Camino del Mar in Del Mar , and Torrey Pines Road in Torrey Pines . In San Diego, one alignment entered La Jolla Village on La Jolla Blvd, while a newer alignment went through Rose Canyon under what is now I-5. Roads followed by US-101 in San Diego included Mission Bay Drive, Pacific Hwy, Harbor Drive and Main Street. It ran along National City Blvd in National City , Broadway in Chula Vista and Beyer Blvd in San Ysidro . By
27118-475: The routes rejoin in Knoxville, Tennessee . Occasionally only one of the two routes is suffixed; US 6N in Pennsylvania does not rejoin US 6 at its west end. AASHTO has been trying to eliminate these since 1934; its current policy is to deny approval of new split routes and to eliminate existing ones "as rapidly as the State Highway Department and the Standing Committee on Highways can reach agreement with reference thereto". Special routes —those with
27300-500: The same large, bold numerals on a square-dimension shield, while 3-digit routes may either use the same shield with a narrower font, or a wider rectangular-dimension shield. Special routes may be indicated with a banner above the route number, or with a letter suffixed to the route number. Signs are generally displayed in several different locations. First, they are shown along the side of the route at regular intervals or after major intersections (called reassurance markers ), which shows
27482-441: The same time, it expands to three lanes in each direction. It then enters Silicon Valley when reaching Morgan Hill , and shortly afterwards expands to four lanes in each direction, with an HOV lane in the middle, before reaching San Jose . From San Jose to San Francisco, US 101 is known as the Bayshore Freeway as it passes through Palo Alto and the other major communities along the San Francisco Peninsula . US 101
27664-401: The segment of the Central Freeway north of Market Street was replaced with the surface-level Octavia Boulevard ; traffic on US 101 was then eventually re-routed to exit south of that at Mission Street/South Van Ness Avenue. With no direct freeway along US 101 through the City of San Francisco, the old US 101E/I-880/I-580 route remains as a faster bypass through the Bay Area. In
27846-409: The site of the largest remaining Redwood old growth forest in the world. A preserved portion of the original, bypassed highway route, known as the Avenue of the Giants for the huge, centuries-old redwood trees, parallels the highway for over 30 miles (48 km) in southern Humboldt County . US 101 again switches to another stretch of divided freeway near the town Pepperwood before reverting to
28028-683: The southern terminus of US 199 , which heads northeast as the Redwood Highway, passing through the Collier Tunnel and terminating in Grants Pass, Oregon . US 101 (no longer called the "Redwood Highway" at this point) is reduced to two lanes and continues north along the California coast until it reaches the Oregon border. High-occupancy toll (HOT) lanes along US 101 between SR 237 in Mountain View and Whipple Avenue in Redwood City opened on February 11, 2022. These express lanes were extended to I-380 in San Bruno on March 3, 2023, and are planned to be extended further south to I-880 in San Jose in Fall 2026. As of August 2022,
28210-439: The southwest to Oklahoma City , from where it ran west to Los Angeles . Kentucky strongly objected to this designated route, as it had been left off any of the major east–west routes, instead receiving the US 62 designation. In January 1926, the committee designated this, along with the part of US 52 east of Ashland, Kentucky , as US 60 . They assigned US 62 to the Chicago-Los Angeles route, contingent on
28392-402: The splits in US 11 , US 19 , US 25 , US 31 , US 45 , US 49 , US 73 , and US 99 . For the most part, the U.S. Routes were the primary means of inter-city vehicle travel; the main exceptions were toll roads such as the Pennsylvania Turnpike and parkway routes such as the Merritt Parkway . Many of the first high-speed roads were U.S. Highways:
28574-505: The states, they are sometimes called Federal Highways , but the roadways were built and have always been maintained by state or local governments since their initial designation in 1926. The route numbers and locations are coordinated by the American Association of State Highway and Transportation Officials (AASHTO). The only federal involvement in AASHTO is a nonvoting seat for the United States Department of Transportation . Generally, most north-to-south highways are odd-numbered, with
28756-481: The states, they made several modifications; the U.S. Highway System was approved on November 11, 1926. Expansion of the U.S. Highway System continued until 1956, when the Interstate Highway System was laid out and began construction under the administration of President Dwight D. Eisenhower . After the national implementation of the Interstate Highway System, many U.S. Routes that had been bypassed or overlaid with Interstate Highways were decommissioned and removed from
28938-458: The system, however, must "substantially meet the current AASHTO design standards ". As of 1989, the United States Numbered Highways system had a total length of 157,724 miles (253,832 km). Except for toll bridges and tunnels , very few U.S. Routes are toll roads . AASHTO policy says that a toll road may only be included as a special route , and that "a toll-free routing between the same termini shall continue to be retained and marked as
29120-437: The system. In some places, the U.S. Routes remain alongside the Interstates and serve as a means for interstate travelers to access local services and as secondary feeder roads or as important major arteries in their own right. In other places, where there are no nearby Interstate Highways, the U.S. Routes often remain as the most well-developed roads for long-distance travel. While the system's growth has slowed in recent decades,
29302-437: The time the first route log was published in April 1927, major numbering changes had been made in Pennsylvania in order to align the routes to the existing auto trails. In addition, U.S. Route 15 had been extended across Virginia . Much of the early criticism of the U.S. Highway System focused on the choice of numbers to designate the highways, rather than names. Some thought a numbered highway system to be cold compared to
29484-492: The two routes received the same number, with a directional suffix indicating its relation to the other. These splits were initially shown in the log as—for instance—US 40 North and US 40 South, but were always posted as simply US 40N and US 40S. The most heated argument, however, was the issue of US 60. The Joint Board had assigned that number to the Chicago-Los Angeles route, which ran more north–south than west–east in Illinois, and then angled sharply to
29666-468: The two-digit routes, three-digit routes have been added, removed, extended and shortened; the "parent-child" relationship is not always present. AASHTO guidelines specifically prohibit Interstate Highways and U.S. Routes from sharing a number within the same state. As with other guidelines, exceptions exist across the U.S. Some two-digit numbers have never been applied to any U.S. Route, including 37, 39, 47, 86, and 88. Route numbers are displayed on
29848-419: The unqualified number to the older or shorter route, while the other route uses the same number marked by a standard strip above its shield carrying the word 'Alternate'." Most states adhere to this approach. However, some maintain legacy routes that violate the rules in various ways. Examples can be found in California , Mississippi , Nebraska , Oregon , and Tennessee . In 1952, AASHO permanently recognized
30030-458: The village of Yaanga . It became a part of the First Mexican Empire in 1821 following the Mexican War of Independence . In 1848, at the end of the Mexican–American War , Los Angeles and the rest of California were purchased as part of the Treaty of Guadalupe Hidalgo and became part of the United States. Los Angeles was incorporated as a municipality on April 4, 1850, five months before California achieved statehood . The discovery of oil in
30212-403: The wake of the dot-com bubble expansion, the segment of US 101 between Morgan Hill and San Jose , also known as the Sig Sanchez Freeway, expanded to eight lanes between Cochrane Road and SR 85 exits between 2001 and 2003 and a new interchange at Bailey Avenue, which had been planned since the 1970s, opened in 2004. Originally, the ten-mile segment (16 km) was only four lanes (it
30394-456: The world's largest by revenue; the city is an important site in the history of film . It also has one of the busiest container ports in the Americas. In 2018, the Los Angeles metropolitan area had a gross metropolitan product of over $ 1.0 trillion, making it the city with the third-largest GDP in the world, after New York and Tokyo . Los Angeles hosted the Summer Olympics in 1932 and 1984 , and will also host in 2028 . Despite
30576-635: The worst rush hour periods in the world, according to an annual traffic index by navigation system maker, TomTom . LA drivers spend an additional 92 hours in traffic each year. During the peak rush hour, there is 80% congestion, according to the index. Los Angeles is often characterized by the presence of low-rise buildings, in contrast to New York City. Outside of a few centers such as Downtown , Warner Center , Century City , Koreatown , Miracle Mile , Hollywood, and Westwood , skyscrapers and high-rise buildings are not common in Los Angeles. The few skyscrapers built outside of those areas often stand out above
30758-469: The year, with an average of only 35 days with measurable precipitation annually. Temperatures in the coastal basin exceed 90 °F (32 °C) on a dozen or so days in the year, from one day a month in April, May, June and November to three days a month in July, August, October and to five days in September. Temperatures in the San Fernando and San Gabriel Valleys are considerably warmer. Temperatures are subject to substantial daily swings; in inland areas
30940-446: Was 2.0 inches (5 cm) on January 15, 1932. While the most recent snowfall occurred in February 2019, the first snowfall since 1962, with snow falling in areas adjacent to Los Angeles as recently as January 2021. Brief, localized instances of hail can occur on rare occasions, but are more common than snowfall. At the official downtown station, the highest recorded temperature is 113 °F (45 °C) on September 27, 2010, while
31122-421: Was also chosen, based on the shield found on the Great Seal of the United States . The auto trail associations rejected the elimination of the highway names. Six regional meetings were held to hammer out the details—May 15 for the West , May 27 for the Mississippi Valley , June 3 for the Great Lakes , June 8 for the South , June 15 for the North Atlantic , and June 15 for New England . Representatives of
31304-430: Was both praised and criticized by local newspapers, often depending on whether that city was connected to a major route. While the Lincoln Highway Association understood and supported the plan, partly because they were assured of getting the US 30 designation as much as possible, most other trail associations lamented their obsolescence. At their January 14–15, 1926 meeting, AASHO was flooded with complaints. In
31486-468: Was completed in 1923. The American Association of State Highway Officials (AASHO), formed in 1914 to help establish roadway standards, began to plan a system of marked and numbered "interstate highways" at its 1924 meeting. AASHO recommended that the Secretary of Agriculture work with the states to designate these routes. Secretary Howard M. Gore appointed the Joint Board on Interstate Highways , as recommended by AASHO, on March 2, 1925. The Board
31668-418: Was composed of 21 state highway officials and three federal Bureau of Public Roads officials. At the first meeting, on April 20 and 21, the group chose the name "U.S. Highway" as the designation for the routes. They decided that the system would not be limited to the federal-aid network; if the best route did not receive federal funds, it would still be included. The tentative design for the U.S. Route shield
31850-408: Was deferred to a numbering committee "without instructions". After working with states to get their approval, the committee expanded the highway system to 75,800 miles (122,000 km), or 2.6% of total mileage, over 50% more than the plan approved August 4. The skeleton of the numbering plan was suggested on August 27 by Edwin Warley James of the BPR, who matched parity to direction, and laid out
32032-435: Was formalized in the Treaty of Guadalupe Hidalgo in 1848, which ceded Los Angeles and the rest of Alta California to the United States. Railroads arrived with the completion of the transcontinental Southern Pacific line from New Orleans to Los Angeles in 1876 and the Santa Fe Railroad in 1885. Petroleum was discovered in the city and surrounding area in 1892, and by 1923, the discoveries had helped California become
32214-424: Was held August 3 and 4, 1925. At that meeting, discussion was held over the appropriate density of routes. William F. Williams of Massachusetts and Frederick S. Greene of New York favored a system of only major transcontinental highways, while many states recommended a large number of roads of only regional importance. Greene in particular intended New York's system to have four major through routes as an example to
32396-572: Was planned to have six lanes when opened in 1984). The rebuilt segment was to alleviate the consistent congestion that had expanded as far south as Masten Avenue coming from Gilroy , and as far north as Bernal Road coming from San Jose. Traffic now typically only runs slow between the Bailey Avenue and East Dunne Avenue exits. The interchange at the beginning of I-280 and I-680 in San Jose was constructed years before its completion. The three flyovers, with no on ramps or off ramps connecting them stood at 110-foot-tall (34 m) over US 101 for years in
32578-421: Was removed by the 1940s and became SR 17 (later designated as I-880 and the westernmost section I-580 ), running from San Jose to Oakland and then across the Richmond–San Rafael Bridge . Meanwhile, Bayshore Boulevard was later redesignated as the US 101A bypass and then eventually upgraded to what is now the Bayshore Freeway . The first stretch that was completed between Redwood City and South San Francisco
32760-415: Was replaced by the San Diego freeway (which US 101 became part of it in 1958) and finally replaced by I-5 in 1968. In northern Orange County, US 101 followed Harbor Boulevard . U.S. Route 101 left Orange County, traversed southeast Los Angeles County, and entered the City of Los Angeles along Whittier Boulevard . Significant portions of US 101 from its southern terminus to the San Francisco Bay Area
32942-435: Was taken down in Santa Barbara. The primary control city that is listed on freeway signs along northbound US 101 through the Central Coast region remains San Francisco. As the result of freeway revolts in San Francisco in the 1950s, a direct freeway connection through the city to the Golden Gate Bridge has never been built. The Central Freeway was completed to extend from the Bayshore Freeway to Turk Street in 1959, before
33124-411: Was the Bay Area's first freeway when it opened in 1947. After the entire Bayshore Freeway was completed in the early 1960s, the old alignment along the peninsula was renumbered and renamed as SR 82 /El Camino Real. Various other freeway or expressway bypasses along the California Central Coast were also built. In 1991, the last traffic signal along US 101 between Los Angeles and San Francisco
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