47-632: Interstate 675 ( I-675 ) is an 11.04-mile-long (17.77 km) auxiliary Interstate Highway in the southeast part of the Atlanta metropolitan area . It travels from I-75 in Stockbridge in the south to I-285 in the north. I-675 is also designated as the Terrell Starr Parkway and also has the unsigned internal state route designation of State Route 413 ( SR 413 ). Beginning at its southern terminus with I-75, I-675
94-568: A loop route ) completely surrounds a metropolitan city, and it is often connected with multiple junctions to other routes. Unlike other auxiliary Interstate Highways (and by extension, all primary Interstate Highways ), beltways do not have termini; however, they have a place where the highway mileage resets to zero. Beltways are also preceded by an even number in the first digit. Some examples of beltways include: Ring road A ring road (also known as circular road, beltline , beltway , circumferential ( high ) way , loop or orbital )
141-413: A city or town, with the standard of road being anything from an ordinary city street up to motorway level. An excellent example of this is London's North Circular/South Circular ring roads, which are largely made up of (mainly congested) ordinary city streets. In some cases, a circumferential route is formed by the combination of a major through highway and a similar-quality loop route that extends out from
188-669: A complete belt road around Hawaii Island . Other major U.S. cities with such a beltway superhighway: There are other U.S. superhighway beltway systems that consist of multiple routes that require multiple interchanges and thus do not provide true ring routes. Two designated examples are the Capital Beltway around Harrisburg, Pennsylvania using Interstate 81 , Interstate 83 , and Pennsylvania Route 581 and "The Bypass" around South Bend, Indiana using Interstate 80 , Interstate 90 , U.S. Route 31 , and Indiana State Road 331 . Edmonton , Alberta, has two ring roads. The first
235-492: A subset of highways within the United States' Interstate Highway System . The 323 auxiliary routes generally fall into three types: spur routes , which connect to or intersect the parent route at one end; bypasses , which connect to the parent route at both ends; and beltways , which form a circle that intersects the parent route at two locations. Some routes connect to the parent route at one end but to another route at
282-451: A surface road, then go underground with a road tunnel. This would displace some neighborhoods and industrial areas to the south. The tunnel would protect other areas north of I-20; however, there would still be ventilation buildings. In 2010, the proposal faced opposition from then-Atlanta mayor Kasim Reed and many residents of the areas it would pass through. An August 2010 GDOT feasibility study found that "no physical constraints exist along
329-528: A through-the-city route there, with the Beltway encircling the city as I-495. The portion of I-95 entering the city from the south was soon completed (and so signed), primarily by adapting an existing major highway, but the planned extension of I-95 through residential areas northward to the Beltway was long delayed, and eventually abandoned, leaving the eastern portion of the Beltway as the best Interstate-quality route for through traffic. This eastern portion of
376-571: A town or city, typically without either signals or road or railroad crossings. In the United States, beltways are commonly parts of the Interstate Highway System. Similar roads in the United Kingdom are often called "orbital motorways". Although the terms "ring road" and "orbital motorway" are sometimes used interchangeably, "ring road" often indicates a circumferential route formed from one or more existing roads within
423-532: A true ring road around Detroit is effectively blocked by its location on the border with Canada and the Detroit River ; although constructing a route mostly or entirely outside city limits is technically feasible, a true ring around Detroit would necessarily pass through Canada, and so Interstate 275 and Interstate 696 together bypass but do not encircle the city. Sometimes, the presence of significant natural or historical areas limits route options, as for
470-446: A typical 3-digit Interstate Highway, bypasses usually have both its two termini junctioned with another Interstate highway. Bypass routes are preceded by an even number in the first digit. Examples include: In the case of an auxiliary Interstate highway which has both ends at Interstates but not the same Interstate, some states treat these as bypasses while others treat these as spurs—see Spur route above. A beltway (also known as
517-536: Is a four-lane highway with a grassy median and frequently with cable barriers . Between Ellenwood Road/Forest Parkway and the route's northern terminus at I-285 and Moreland Avenue, the freeway expands with three lanes in each direction. The southern end of I-675 includes reversible high-occupancy toll (HOT) and express toll lanes built within the median, the South Metro Express Lanes , which opened January 28, 2017. The entire length of I-675
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#1732779958693564-405: Is a loose conglomeration of four major arterial roads with an average distance of 6 kilometres (3.7 mi) from the downtown core. Yellowhead Trail forms the northern section, Wayne Gretzky Drive /75 Street forms the eastern section, Whitemud Drive forms the southern and longest section, and 170 Street forms the western and shortest section. Whitemud Drive is the only section that
611-409: Is a road or a series of connected roads encircling a town, city or country. The most common purpose of a ring road is to assist in reducing traffic volumes in the urban centre, such as by offering an alternate route around the city for drivers who do not need to stop in the city core. Ring roads can also serve to connect suburbs to each other, allowing efficient travel between them. The name "ring road"
658-413: Is a true controlled-access highway , while Yellowhead Trail and Wayne Gretzky Drive have interchanges and intersections and are therefore both limited-access roads . 170 Street and 75 Street are merely large arterial roads with intersections only. The second and more prominent ring road is named Anthony Henday Drive ; it circles the city at an average distance of 12 kilometres (7.5 mi) from
705-417: Is challenging when a through highway and a loop bypass together form a circumferential ring road. Since neither of the highways involved is circumferential itself, either dual signage or two (or more) route numbers is needed. The history of signage on the Capital Beltway around Washington, D.C., is instructive here. Interstate 95 , a major through highway along the U.S. East Coast , was originally planned as
752-535: Is part of the National Highway System , a system of routes determined to be the most important for the nation's economy, mobility, and defense. At one time, I-675 was to connect with I-485 / State Route 400 (SR 400) east of Downtown Atlanta . However, this would have destroyed many neighborhoods including Inman Park . Because it was thought that the road was unnecessary due to three other existing north–south Interstates across and around
799-846: Is used for the majority of metropolitan circumferential routes in Europe, such as the Berliner Ring , the Brussels Ring , the Amsterdam Ring , the Boulevard Périphérique around Paris and the Leeds Inner and Outer ring roads. Australia , Pakistan and India also use the term ring road, as in Melbourne 's Western Ring Road , Lahore 's Lahore Ring Road and Hyderabad 's Outer Ring Road . In Canada
846-423: Is usually one of the following: Examples include: Sometimes, a three-digit Interstate Highway branches off from another three-digit Interstate Highway. These spurs do not connect directly with their parent highways, but are associated with them via the three-digit highways they do intersect with. Examples include: A bypass route may traverse around a city, or may run through it with the mainline bypassing. In
893-500: The Capital Beltway around Washington, D.C. Some ring roads, such as Washington's Capital Beltway, use "Inner Loop" and "Outer Loop" terminology for directions of travel, since cardinal (compass) directions cannot be signed uniformly around the entire loop. The term 'ring road' is occasionally – and inaccurately – used interchangeably with the term ' bypass '. Bypasses around many large and small towns were built in many areas when many old roads were converted to four-lane status in
940-474: The Frankfurt area, major national highways converge just outside city limits before forming one of several routes of an urban network of roads circling the city. Unlike in United States, route numbering is not a challenge on European ring roads as routes merge to form the single designated road. However, exit and road junction access can be challenging due to the complexity of other routes branching from or into
987-670: The Jimmy Carter Library and Museum . In 1982, the entire length of the highway began construction. After several delays, the expressway opened 3 years late and $ 10 million over budget in 1987. In 2006, a Reason Foundation report suggested a tunnel connecting I-675 to SR 400 and completing the originally proposed Interstate 420 estimating a cost of $ 4.8 billion. In 2009, the idea of connecting I-675 and SR 400 had been officially resurrected, being put on an official list of Georgia Department of Transportation (GDOT) priorities. This would extend I-675 north to I-20 with
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#17327799586931034-943: The North and South Circular roads and the Inner Ring Road ). Birmingham also has three ring roads which consist of the Birmingham Box ; the A4540 , commonly known as the Middleway; and the A4040 , the Outer Ring Road. Birmingham once had a fourth ring road, the A4400 . This has been partially demolished and downgraded to improve traffic flow into the city. Other British cities have two: Leeds , Sheffield , Norwich and Glasgow . Cleveland, OH and San Antonio, TX , in
1081-495: The United States , also each have two, while Houston, Texas will have three official ring roads (not including the downtown freeway loop). Some cities have far more – Beijing , for example, has six ring roads , simply numbered in increasing order from the city center (though skipping #1), while Moscow has five, three innermost ( Central Squares of Moscow , Boulevard Ring and Garden Ring ) corresponding to
1128-866: The 1930s to 1950s, such as those along the Old National Road (now generally U.S. 40 or Interstate 70 ) in the United States, leaving the old road in place to serve the town or city, but allowing through travelers to continue on a wider, faster and safer route. Construction of fully circumferential ring roads has generally occurred more recently, beginning in the 1960s in many areas, when the U.S. Interstate Highway System and similar-quality roads elsewhere were designed. Ring roads have now been built around numerous cities and metropolitan areas, including cities with multiple ring roads, irregularly shaped ring roads and ring roads made up of various other long-distance roads. London has three ring roads (the M25 motorway ,
1175-680: The 1950s and not yet completed, called the Suburban Beltway. It consists of several roads— Lagimodière Boulevard , Abinojii Mikanah , the Fort Garry Bridge, the Moray Bridge, William R Clement Parkway , Chief Peguis Trail and the Kildonan Bridge . Saskatoon , Saskatchewan, has a ring road named Circle Drive. It is cosigned as Saskatchewan Highway 16 and Saskatchewan Highway 11 along the whole route since
1222-415: The 2013 opening of Circle Drive South. Regina , Saskatchewan has a partial ring road that is named Ring Road ; however, due to the city's urban growth since the road was originally constructed, it no longer functions as a true ring road and has instead come to be used partially for local arterial traffic. The Regina Bypass , a new partial ring road, has replaced it, although Ring Road must still be used in
1269-604: The Beltway ", derived metonymically from the Capital Beltway encircling Washington, D.C. Ring roads have been criticised for inducing demand , leading to more car journeys being taken and thus higher levels of pollution being created. By creating easy access by car to large areas of land, they can also act as a catalyst for development, leading to urban sprawl and car-centric planning. Ring roads have also been criticised for splitting communities and being difficult to navigate for pedestrians and cyclists. Most orbital motorways (or beltways) are purpose-built major highways around
1316-468: The Beltway was then redesignated from I-495 to I-95, leaving the I-495 designation only on the western portion, and the completed part of the planned Interstate inside the Beltway was redesignated as a spur, I-395 . A few years later, the resulting confusion from different route numbers on the circumferential Beltway was resolved by restoring I-495 signage for the entire Beltway, with dual signage for I-95 for
1363-407: The United States. In many cases, such as Interstate 285 in Atlanta, Georgia , circumferential highways serve as a bypass while other highways pass directly through the city center. In other cases, a primary Interstate highway passes around a city on one side, with a connecting loop Interstate bypassing the city on the other side, together forming a circumferential route, as with I-93 and I-495 in
1410-592: The area of Lawrence, Massachusetts . However, if a primary Interstate passes through a city and a loop bypasses it on only one side (as in the Wilmington, Delaware , area), no fully circumferential route is provided. Within cities, ring roads sometimes have local nicknames; these include Washington DC's Interstate 495 (The "Capital Beltway"), Interstate 270 in Columbus, Ohio (The "Outerbelt"), and Interstate 285 in Atlanta (The "Perimeter"). Route numbering
1457-413: The city and due to community opposition , the highway was stopped by then-Governor of Georgia Jimmy Carter in 1975. After I-485 was canceled, it was then planned to end at once proposed I-420 near Gresham Park . However, in 1986, I-420 was canceled for the same reason. So, its northern terminus is at I-285 instead. What would have been the interchange between this road and I-485 is now the location of
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1504-475: The city of Calgary , Alberta, for an entire length of 101-kilometre (63 mi). Winnipeg , Manitoba, has a ring road which is called the Perimeter Highway . It is designated as Manitoba Highway 101 on the north, northwest and east sides and as Manitoba Highway 100 on the south and southwest sides. The majority of it is a four-lane divided expressway . It has a second ring road, planned since
1551-614: The concentric lines of fortifications around the ancient city, and the two outermost ( MKAD and Third Ring ) built in the twentieth century, though, confusingly, the Third Ring was built last. Geographical constraints can complicate the construction of a complete ring road. For example, the Baltimore Beltway in Maryland formerly crossed Baltimore Harbor on a high arch bridge prior to its collapse in 2024, and much of
1598-509: The downtown core. It is a freeway for its entire 78-kilometre (48 mi) length, and was built to reduce inner-city traffic congestion, created a bypass of Yellowhead Trail, and has improved the movement of goods and services across Edmonton and the surrounding areas. It was completed in October 2016 as the first free-flowing orbital road in Canada. Stoney Trail is a ring road that circles
1645-665: The highway's concurrent use as a through Interstate on its eastern portion. The longest complete beltway in the United States is the Charles W. Anderson Loop , a 94-mile (151 km) loop in Texas that forms a complete loop around the Greater San Antonio area. The longest complete belt road, or a beltway that is only two lanes, in the United States is Hawaii Belt Road , a 260-mile (420 km) belt in Hawaii that forms
1692-542: The long-proposed Outer Beltway around Washington, D.C., where options for a new western Potomac River crossing are limited by a nearly continuous corridor of heavily visited scenic, natural, and historical landscapes in the Potomac River Gorge and adjacent areas. When referring to a road encircling a capital city, the term "beltway" can also have a political connotation, as in the American term " Inside
1739-711: The northeast quadrant of the city. Hamilton , Ontario, has the Lincoln M. Alexander Parkway , Highway 403 and the Red Hill Valley Parkway which form a ring on three sides. Sudbury , Ontario, has a partial ring road consisting of the Southwest and Southeast Bypasses segment of Highway 17 , and the Northwest Bypass segment of Highway 144 . An unofficial northeast "bypass" route can also be completed on city arterial roads that largely bypass
1786-433: The numbers can repeat from state to state along their route, but they will not repeat within a state. There are three states that have no auxiliary Interstate Highways: Alaska, Arizona, and New Mexico. North Dakota has an auxiliary route, but it is unsigned , and Wyoming's does not meet Interstate Highway standards. Auxiliary Interstates are divided into three types: spur , loop , and bypass routes. The first digit of
1833-687: The other end; some states treat these as spurs while others treat them as bypasses. Like the primary Interstate Highways , auxiliary highways meet Interstate Highway standards (with rare exceptions ). The shorter auxiliary routes branch from primary routes; their numbers are based on the parent route's number. All of the supplement routes for Interstate 95 (I-95) are designated with a three-digit number ending in "95": I-x95. With some exceptions, spur routes are numbered with an odd hundreds digit (such as I-395 ), while bypasses and beltways are numbered with an even hundreds digit (such as I-695 ). Because longer Interstates may have many such supplemental routes,
1880-522: The parent road, later reconnecting with the same highway. Such loops not only function as a bypass for through traffic, but also to serve outlying suburbs . In the United States, an Interstate highway loop is usually designated by a three-digit number beginning with an even digit before the two-digit number of its parent interstate. Interstate spurs, on the other hand, generally have three-digit numbers beginning with an odd digit. Circumferential highways are prominent features in or near many large cities in
1927-691: The partially completed Stockholm Ring Road in Sweden runs through tunnels or over long bridges. Some towns or cities on sea coasts or near rugged mountains cannot have a full ring road. Examples of such partial ring roads are Dublin's ring road ; and, in the USA, Interstate 287 , mostly in New Jersey (bypassing New York City), and Interstate 495 around Boston , none of which completely circles these seaport cities. In other cases, adjacent international boundaries may prevent ring road completion. Construction of
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1974-440: The proposed alignment that would preclude construction of a tunnel" and over a 75 year period, it would be expected to save 2.8 billion hours. After the 2017 Interstate 85 bridge collapse , the plan received temporary interest. As of August 2022, it is not on GDOT 's Major Mobility Investment Project list. Auxiliary Interstate Highway Auxiliary Interstate Highways (also called three-digit Interstate Highways ) are
2021-476: The ring road. One of the most renowned ring roads is the Vienna Ring Road ( Ringstraße ), a grand boulevard constructed in the mid-19th century and filled with representative buildings. Due to its unique architectural beauty and history, it has also been called the "Lord of the ring roads", and is declared by UNESCO as part of Vienna's World Heritage Site . Major European cities that are served by
2068-422: The standard numbering guidelines exist for a number of reasons. In some cases, original routes were changed, extended, or abandoned, leaving discrepancies in the system. In other cases, it may not be possible to use the proper number because the limited set of available numbers has been exhausted, causing a "non-standard" number to be used. A spur route 's number usually has an odd number for its first digit. It
2115-572: The term is the most commonly used, with "orbital" also used, but to a much lesser extent. In Europe and Australia, some ring roads, particularly longer ones of motorway standard, are known as "orbital motorways". Examples are the London Orbital (generally known as the M25; 188 km), Sydney Orbital Network (110 km) and Rome Orbital (68 km). In the United States many ring roads are called beltlines , beltways or loops , such as
2162-521: The three digits usually signifies whether a route is a bypass, spur, or beltway. The last two digits are derived from the main Interstate Highway. For instance, I-115 contains an odd number in the first digit (1), which indicates that this freeway is a spur. The last two digits signify the highway's origin. In this case, the "15" in I-115 shows that it is a supplement to I-15 . Exceptions to
2209-479: The urban core of the city, but are not fully controlled-access and must be shared with local traffic in the Nickel Centre and Rayside-Balfour districts of the city. Most major cities in Europe are served by a ring road that circles either the inner core of their metropolitan areas or the outer borders of the city proper or both. In major transit hubs, such as the Île-de-France region surrounding Paris and
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