136-456: [REDACTED] The Lexington Avenue–63rd Street station (formerly Lexington Avenue ) is a New York City Subway station in Lenox Hill , Manhattan , shared by the IND and BMT 63rd Street Lines . Located at the intersection of Lexington Avenue and 63rd Street, it is served by the F and Q trains at all times; <F> trains during rush hours in the peak direction; limited rush hour N trains; and one A.M. rush hour R train in
272-695: A canal . The central portions of a rapid transit network are usually in the tunnel. Some tunnels are used as sewers or aqueducts to supply water for consumption or for hydroelectric stations. Utility tunnels are used for routing steam, chilled water, electrical power or telecommunication cables, as well as connecting buildings for convenient passage of people and equipment. Secret tunnels are built for military purposes, or by civilians for smuggling of weapons , contraband , or people . Special tunnels, such as wildlife crossings , are built to allow wildlife to cross human-made barriers safely. Tunnels can be connected together in tunnel networks . A tunnel
408-532: A cross-platform interchange between local and express services. Some four-track lines with express service have two tracks each on two levels and use both island and side platforms. Since the majority of the system was built before 1990, the year the Americans with Disabilities Act (ADA) went into effect, many New York City Subway stations were not designed to be accessible to all. Since then, elevators have been built in newly constructed stations to comply with
544-532: A Second Avenue Subway tunnel-boring machine completed its run to the Lexington Avenue–63rd Street station's bellmouth from 92nd Street and Second Avenue. Controlled blasting for the section of tunnel between Third Avenue/63rd Street and Second Avenue/65th Street was completed in March 2012. The orange false walls at platform level were removed in 2012 as part of construction, but the orange tiles at
680-497: A Vignelli-style interactive subway map, "The Weekender", an online map that provides information about any planned work, from late Friday night to early Monday morning. In October 2020, the MTA launched a digital version of the map showing real-time service patterns and service changes, designed by Work & Co . Several privately produced schematics are available online or in printed form, such as those by Hagstrom Map . Out of
816-545: A cost of $ 222 million. The section of the line up to Long Island City was projected to open by the end of 1985, but flooding in the tunnel caused the opening to be delayed indefinitely. The MTA's contractors concluded in February 1987 that the tunnel was structurally sound, and the federal government's contractors affirmed this finding in June 1987. The IND side of the station, the southern side, had been completed in 1984, when it
952-449: A large factor in the decision making process. Civil engineers usually use project management techniques for developing a major structure. Understanding the amount of time the project requires, and the amount of labor and materials needed is a crucial part of project planning. The project duration must be identified using a work breakdown structure and critical path method . Also, the land needed for excavation and construction staging, and
1088-769: A letter or a number and "lines" have names. Trains display their route designation. There are 28 train services in the subway system, including three short shuttles . Each route has a color and a local or express designation representing the Manhattan trunk line of the service. New York City residents seldom refer to services by color (e.g., "blue line" or "green line") but out-of-towners and tourists often do. The 1 , C , G , L , M , R , and W trains are fully local and make all stops. The 2 , 3 , 4 , 5 , A , B , D , E , F , N , and Q trains have portions of express and local service. J , Z , 6 , and 7 trains vary by direction, day, or time of day. The letter S
1224-536: A lower mezzanine . Here, the bank splits and there are two separate tubes of two escalators and a stair each to each platform. Lexington Avenue–63rd Street is a deep-level station; its upper and lower levels are about 140 feet (43 m) and 155 feet (47 m) deep respectively, making the station among the system's deepest. This depth is because it has to go under the IRT Lexington Avenue Line and other existing infrastructure, in addition to
1360-660: A northern midtown tunnel from the IND Queens Boulevard Line to the Second and Sixth Avenue Lines, which date back to the IND Second System of the 1920s and 1930s. The Second System was a plan to expand the city-owned and -operated Independent Subway System (IND), which often ran in direct competition with the two privately owned subway companies in the city, Interborough Rapid Transit (IRT) and Brooklyn-Manhattan Transit Corporation (BMT). As
1496-467: A pipe jack, with the span of some box jacks in excess of 20 metres (66 ft). A cutting head is normally used at the front of the box being jacked, and spoil removal is normally by excavator from within the box. Recent developments of the Jacked Arch and Jacked deck have enabled longer and larger structures to be installed to close accuracy. There are also several approaches to underwater tunnels,
SECTION 10
#17327810148171632-542: A public authority presided by New York City, was created in 1953 to take over subway, bus, and streetcar operations from the city, and placed under control of the state-level Metropolitan Transportation Authority in 1968. Organized in 1934 by transit workers of the BRT, IRT, and IND, the Transport Workers Union of America Local 100 remains the largest and most influential local of the labor unions. Since
1768-524: A result, the north side of the station, intended for service to Second Avenue, was hidden with a temporary orange brick wall, and space intended for an exit at Third Avenue was left unused. While the south side of the station opened for service in 1989, the north side was only used for storing trains. In 2007, construction resumed on the Second Avenue Subway, and the north side of the station was renovated so it could be used. The orange wall on
1904-644: A result, the plan for the line only had it connect to two planned IND lines, the Second and Sixth Avenue Lines. In 1940, the subway system was unified, with the IRT and the BMT coming under city control. Consequently, plans for the proposed line were modified. The current plans were drawn up in the 1960s under the Metropolitan Transportation Authority 's Program For Action . Under this plan,
2040-421: A single fare to enter the subway system and may transfer between trains at no extra cost until they exit via station turnstiles; the fare is a flat rate regardless of how far or how long the rider travels. Thus, riders must swipe their MetroCard or tap a contactless payment card or smartphone on an OMNY reader upon entering the subway system, but not a second time upon leaving. Cut-and-cover A tunnel
2176-421: A specialized method called clay-kicking for digging tunnels in clay-based soils. The clay-kicker lies on a plank at a 45-degree angle away from the working face and rather than a mattock with his hands, inserts with his feet a tool with a cup-like rounded end, then turns the tool with his hands to extract a section of soil, which is then placed on the waste extract. Clay-kicking is a specialized method developed in
2312-482: A station, passengers may use station booths (formerly known as token booths) or vending machines to buy their fare, which is currently stored in a MetroCard or OMNY card. Each station has at least one booth, typically located at the busiest entrance. After swiping the card at a turnstile, customers enter the fare-controlled area of the station and continue to the platforms. Inside fare control are "Off-Hours Waiting Areas", which consist of benches and are identified by
2448-431: A subway. The tunnel was never extended for political and financial reasons. Today, no part of this line remains as the tunnel was completely within the limits of the present-day City Hall station under Broadway. The Great Blizzard of 1888 helped demonstrate the benefits of an underground transportation system. A plan for the construction of the subway was approved in 1894, and construction began in 1900. Even though
2584-563: A transfer to the IRT Lexington Avenue Line for F train customers as such a connection had been provided at the Lexington Avenue–53rd Street station along the previous routing of the F train. The MTA's plans for Second Avenue Subway service extended the Q train (and selected rush-hour N train short turn trips), running via the BMT Broadway Line , along the BMT 63rd Street Line to serve this station, beyond which
2720-434: A tube can be sunk into a body of water, which is called an immersed tunnel. Cut-and-cover is a simple method of construction for shallow tunnels where a trench is excavated and roofed over with an overhead support system strong enough to carry the load of what is to be built above the tunnel. There are two basic forms of cut-and-cover tunnelling: Shallow tunnels are often of the cut-and-cover type (if under water, of
2856-747: A tunnel than a sufficiently strong bridge). Some water crossings are a mixture of bridges and tunnels, such as the Denmark to Sweden link and the Chesapeake Bay Bridge-Tunnel in Virginia . There are particular hazards with tunnels, especially from vehicle fires when combustion gases can asphyxiate users, as happened at the Gotthard Road Tunnel in Switzerland in 2001. One of the worst railway disasters ever,
SECTION 20
#17327810148172992-432: A tunnel. Bridges usually require a larger footprint on each shore than tunnels. In areas with expensive real estate, such as Manhattan and urban Hong Kong , this is a strong factor in favor of a tunnel. Boston's Big Dig project replaced elevated roadways with a tunnel system to increase traffic capacity, hide traffic, reclaim land, redecorate, and reunite the city with the waterfront. The 1934 Queensway Tunnel under
3128-497: A yellow sign. A typical subway station has waiting platforms ranging from 480 to 600 feet (150 to 180 m) long. Some are longer. Platforms of former commuter rail stations—such as those on the IND Rockaway Line , are even longer. With the many different lines in the system, one platform often serves more than one service. Passengers need to look at the overhead signs to see which trains stop there and when, and at
3264-547: Is an underground or undersea passageway. It is dug through surrounding soil, earth or rock, or laid under water, and is usually completely enclosed except for the two portals common at each end, though there may be access and ventilation openings at various points along the length. A pipeline differs significantly from a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods. A tunnel may be for foot or vehicular road traffic , for rail traffic, or for
3400-489: Is approximately 8 feet 9 inches (2.67 m) wide and 51 feet 4 inches (15.65 m) long, whereas B Division equipment is about 10 feet (3.05 m) wide and either 60 feet 6 inches (18.44 m) or 75 feet (22.86 m) long. The different lengths for the B Division fleet are necessary because 75-foot cars can not be used over the BMT Eastern Division . Cars purchased by
3536-505: Is intended to carry both the Istanbul metro and a two-level highway, over a length of 6.5 km (4.0 miles). The French A86 Duplex Tunnel [ fr ] in west Paris consists of two bored tunnel tubes, the eastern one of which has two levels for light motorized vehicles, over a length of 10 km (6.2 miles). Although each level offers a physical height of 2.54 m (8.3 ft), only traffic up to 2 m (6.6 ft) tall
3672-406: Is no nightly system shutdown for maintenance, tracks and stations must be maintained while the system is operating. This work sometimes necessitates service changes during midday, overnight hours, and weekends. When parts of lines are temporarily shut down for construction purposes, the transit authority can substitute free shuttle buses (using MTA Regional Bus Operations bus fleet ) to replace
3808-494: Is relatively long and narrow; the length is often much greater than twice the diameter , although similar shorter excavations can be constructed, such as cross passages between tunnels. The definition of what constitutes a tunnel can vary widely from source to source. For example, in the United Kingdom, a road tunnel is defined as "a subsurface highway structure enclosed for a length of 150 metres (490 ft) or more." In
3944-427: Is smaller than the peak of the system. In addition to the demolition of former elevated lines, which collectively have resulted in the demolition of over a hundred stations, other closed stations and unused portions of existing stations remain in parts of the system. Many stations in the subway system have mezzanines . Mezzanines allow for passengers to enter from multiple locations at an intersection and proceed to
4080-401: Is sometimes necessary during the excavation of a tunnel. They are usually circular and go straight down until they reach the level at which the tunnel is going to be built. A shaft normally has concrete walls and is usually built to be permanent. Once the access shafts are complete, TBMs are lowered to the bottom and excavation can start. Shafts are the main entrance in and out of the tunnel until
4216-515: Is that the open building pit is muted after tunnel construction; no roof is placed. Some tunnels are double-deck, for example, the two major segments of the San Francisco–Oakland Bay Bridge (completed in 1936) are linked by a 160-metre (540 ft) double-deck tunnel section through Yerba Buena Island , the largest-diameter bored tunnel in the world. At construction this was a combination bidirectional rail and truck pathway on
Lexington Avenue–63rd Street station - Misplaced Pages Continue
4352-698: Is the Siloam Tunnel , built in Jerusalem by the kings of Judah around the 8th century BC. Another tunnel excavated from both ends, maybe the second known, is the Tunnel of Eupalinos , which is a tunnel aqueduct 1,036 m (3,400 ft) long running through Mount Kastro in Samos , Greece. It was built in the 6th century BC to serve as an aqueduct . In Ethiopia , the Siqurto foot tunnel , hand-hewn in
4488-554: Is used for three shuttle services: Franklin Avenue Shuttle , Rockaway Park Shuttle , and 42nd Street Shuttle . Though the subway system operates on a 24-hour basis , during late night hours some of the designated routes do not run, run as a shorter route (often referred to as the "shuttle train" version of its full-length counterpart) or run with a different stopping pattern. These are usually indicated by smaller, secondary route signage on station platforms. Because there
4624-577: The 142nd Street and Myrtle Avenue junctions, whose tracks intersect at the same level, as well as the same-direction pairs of tracks on the IRT Eastern Parkway Line at Rogers Junction . The 7,700 workers who built the original subway lines were mostly immigrants living in Manhattan. More recent projects use tunnel boring machines , which increase the cost. However, they minimize disruption at street level and avoid already existing utilities. Examples of such projects include
4760-672: The 472 stations , 470 are served 24 hours a day. Underground stations in the New York City Subway are typically accessed by staircases going down from street level. Many of these staircases are painted in a common shade of green, with slight or significant variations in design. Other stations have unique entrances reflective of their location or date of construction. Several station entrance stairs, for example, are built into adjacent buildings. Nearly all station entrances feature color-coded globe or square lamps signifying their status as an entrance. The current number of stations
4896-548: The 63rd Street Lines , opened in 1989. The new South Ferry station was built and connected to the existing Whitehall Street–South Ferry station in 2009. The one-stop 7 Subway Extension to the west side of Manhattan, consisting of the 34th Street–Hudson Yards station, was opened in 2015, and three stations on the Second Avenue Subway in the Upper East Side were opened as part of Phase 1 of
5032-569: The Balvano train disaster , was caused by a train stalling in the Armi tunnel in Italy in 1944, killing 426 passengers. Designers try to reduce these risks by installing emergency ventilation systems or isolated emergency escape tunnels parallel to the main passage. Government funds are often required for the creation of tunnels. When a tunnel is being planned or constructed, economics and politics play
5168-706: The Chicago "L" plans all stations to be accessible in the 2030s, the Toronto subway will be fully accessible by 2025, and Montreal Metro plans all stations to be accessible by 2038. Both the Boston and Chicago systems are as old or older than the New York City Subway, though all of these systems have fewer stations than the New York City Subway. Newer systems like the Washington Metro and Bay Area Rapid Transit have been fully accessible from their opening in
5304-549: The IND Sixth Avenue Line was completed in 1940, the city went into great debt , and only 33 new stations have been added to the system since, nineteen of which were part of defunct railways that already existed. Five stations were on the abandoned New York, Westchester and Boston Railway , which was incorporated into the system in 1941 as the IRT Dyre Avenue Line . Fourteen more stations were on
5440-719: The IRT Broadway–Seventh Avenue Line , which ran directly underneath the World Trade Center . Sections of the tunnel, as well as the Cortlandt Street station, which was directly underneath the Twin Towers, were severely damaged. Rebuilding required the suspension of service on that line south of Chambers Street. Ten other nearby stations were closed for cleanup. By March 2002, seven of those stations had reopened. Except for Cortlandt Street,
5576-720: The IRT subway debuted in 1904, the typical tunnel construction method was cut-and-cover . The street was torn up to dig the tunnel below before being rebuilt from above. Traffic on the street above would be interrupted due to the digging up of the street. Temporary steel and wooden bridges carried surface traffic above the construction. Contractors in this type of construction faced many obstacles, both natural and human made. They had to deal with rock formations and groundwater, which required pumps. Twelve miles of sewers, as well as water and gas mains, electric conduits, and steam pipes had to be rerouted. Street railways had to be torn up to allow
Lexington Avenue–63rd Street station - Misplaced Pages Continue
5712-538: The New York City Transit Authority , an affiliate agency of the state-run Metropolitan Transportation Authority (MTA). Opened on October 27, 1904, the New York City Subway is one of the world's oldest public transit systems, one of the most-used, and the one with the most stations, with 472 stations in operation (423, if stations connected by transfers are counted as single stations). The system has operated 24/7 service every day of
5848-482: The New York City fiscal crisis in 1975, the station did not open until 1989. Originally, the station was intended to be a transfer point for Sixth Avenue / Queens Boulevard and Broadway / Second Avenue services. As such, the station was designed to allow for cross-platform interchanges on both levels. However, construction of the Second Avenue Subway was halted in 1975 during the station's construction. As
5984-471: The Port Authority of New York and New Jersey was not aware of this bill and had not asked for a grant for such a project. Increased taxes to finance a large project may cause opposition. Tunnels are dug in types of materials varying from soft clay to hard rock. The method of tunnel construction depends on such factors as the ground conditions, the groundwater conditions, the length and diameter of
6120-848: The Queens-Midtown Tunnel between Manhattan and the borough of Queens on Long Island ; the Detroit-Windsor Tunnel between Michigan and Ontario ; and the Elizabeth River tunnels between Norfolk and Portsmouth, Virginia ; the 1934 River Mersey road Queensway Tunnel ; the Western Scheldt Tunnel , Zeeland, Netherlands; and the North Shore Connector tunnel in Pittsburgh, Pennsylvania . The Sydney Harbour Tunnel
6256-612: The R142 , R142A , R143 , R160 , R179 and R188 were placed into service. These cars are collectively known as New Technology Trains (NTTs) due to modern innovations such as LED and LCD route signs and information screens, as well as recorded train announcements and the ability to facilitate Communication-Based Train Control (CBTC) . As part of the 2017–2020 MTA Financial Plan, 600 subway cars will have electronic display signs installed to improve customer experience. Riders pay
6392-472: The River Mersey at Liverpool was chosen over a massively high bridge partly for defense reasons; it was feared that aircraft could destroy a bridge in times of war, not merely impairing road traffic but blocking the river to navigation. Maintenance costs of a massive bridge to allow the world's largest ships to navigate under were considered higher than for a tunnel. Similar conclusions were reached for
6528-679: The United Kingdom of digging tunnels in strong clay-based soil structures. This method of cut and cover construction required relatively little disturbance of property during the renewal of the United Kingdom's then ancient sewerage systems. It was also used during the First World War by Royal Engineer tunnelling companies placing mines beneath German lines, because it was almost silent and so not susceptible to listening methods of detection. Tunnel boring machines (TBMs) and associated back-up systems are used to highly automate
6664-610: The canton of Glarus . The borehole has a diameter of 8.03 metres (26.3 ft). The four TBMs used for excavating the 57-kilometre (35 mi) Gotthard Base Tunnel , in Switzerland , had a diameter of about 9 metres (30 ft). A larger TBM was built to bore the Green Heart Tunnel (Dutch: Tunnel Groene Hart) as part of the HSL-Zuid in the Netherlands, with a diameter of 14.87 metres (48.8 ft). This in turn
6800-644: The extension of the IRT Flushing Line and the IND Second Avenue Line . Since the opening of the original New York City Subway line in 1904, multiple official and planning agencies have proposed numerous extensions to the subway system. One of the more expansive proposals was the " IND Second System", part of a plan to construct new subway lines in addition to taking over existing subway lines and railroad rights-of-way. The most grandiose IND Second Subway plan, conceived in 1929,
6936-489: The water table . This pressurizes the ground ahead of the TBM cutter head to balance the water pressure. The operators work in normal air pressure behind the pressurized compartment, but may occasionally have to enter that compartment to renew or repair the cutters. This requires special precautions, such as local ground treatment or halting the TBM at a position free from water. Despite these difficulties, TBMs are now preferred over
SECTION 50
#17327810148177072-689: The 16th century as a metaphor for a narrow, confined space like the inside of a cask. Some of the earliest tunnels used by humans were paleoburrows excavated by prehistoric mammals. Much of the early technology of tunneling evolved from mining and military engineering . The etymology of the terms "mining" (for mineral extraction or for siege attacks ), " military engineering ", and " civil engineering " reveals these deep historic connections. Predecessors of modern tunnels were adits that transported water for irrigation , drinking, or sewerage . The first qanats are known from before 2000 BC. The earliest tunnel known to have been excavated from both ends
7208-638: The 1960s. The main idea of this method is to use the geological stress of the surrounding rock mass to stabilize the tunnel, by allowing a measured relaxation and stress reassignment into the surrounding rock to prevent full loads becoming imposed on the supports. Based on geotechnical measurements, an optimal cross section is computed. The excavation is protected by a layer of sprayed concrete, commonly referred to as shotcrete . Other support measures can include steel arches, rock bolts, and mesh. Technological developments in sprayed concrete technology have resulted in steel and polypropylene fibers being added to
7344-410: The 1970s. In November 2016, the New York City Subway had 6712 cars on the roster. A typical New York City Subway train consists of 8 to 11 cars, although shuttles can have as few as two, and the train can range from 150 to 600 feet (46 to 183 m) in length. The system maintains two separate fleets of cars, one for the A Division routes and another for the B Division routes. A Division equipment
7480-654: The 1971 Kingsway Tunnel under the Mersey. In Hampton Roads, Virginia , tunnels were chosen over bridges for strategic considerations; in the event of damage, bridges might prevent US Navy vessels from leaving Naval Station Norfolk . Water-crossing tunnels built instead of bridges include the Seikan Tunnel in Japan; the Holland Tunnel and Lincoln Tunnel between New Jersey and Manhattan in New York City ;
7616-450: The 1980s, make the current fleet of subway cars graffiti-free, as well as order 1,775 new subway cars. By the early 1990s, conditions had improved significantly, although maintenance backlogs accumulated during those 20 years are still being fixed today. Entering the 21st century, progress continued despite several disasters. The September 11 attacks resulted in service disruptions on lines running through Lower Manhattan, particularly
7752-415: The 2020–2024 Capital Program. This would allow one of every two to four stations on every line to be accessible, so that all non-accessible stops would be a maximum of two stops from an accessible station. In 2022, the MTA agreed in a settlement to make 95 percent of subway and Staten Island Railway stations accessible by 2055. By comparison, all but one of Boston's MBTA subway stations are accessible,
7888-486: The 425-station system. Google Maps: Street View: New York City Subway July 3, 1868 ; 156 years ago ( 1868-07-03 ) (first elevated, rapid transit operation) [REDACTED] The New York City Subway is a rapid transit system in New York City serving the boroughs of Manhattan , Brooklyn , Queens , and the Bronx . It is owned by the government of New York City and leased to
8024-524: The ADA. (Most grade-level stations required little modification to meet ADA standards.) Many accessible stations have AutoGate access. In addition, the MTA identified "key stations", high-traffic and/or geographically important stations, which must conform to the ADA when they are extensively renovated. Under plans from the MTA in 2016, the number of ADA accessible stations would go up to 144 by 2020. As of May 2024 , there were 145 ADA-accessible stations. Over
8160-494: The BMT Broadway Line. Directly to the west of the station is a crossover to facilitate a connection between the BMT and IND lines. Construction on the 63rd Street Line, including the Lexington Avenue–63rd Street station, began on November 25, 1969. The station was built using a combination of cut-and-cover construction and tunneling machines. After the construction of the Second Avenue Subway ceased in 1975 due to
8296-433: The BMT side, the planned track connections to the Second Avenue Subway curved slightly north. After the tracks ended, the roadbed went on for a few hundred feet before ending. With the Second Avenue Subway connection, these tunnels now merge into the tunnels of Phase 1 of the IND Second Avenue Line . In 2007, the Second Avenue Subway resumed construction. As part of the project, the station was to undergo renovation to finish
SECTION 60
#17327810148178432-449: The BMT side, which would serve Second Avenue Line trains. The renovation included installation of new platform staircases, new wall tiles, new columns and column cladding, new platform pavings, new entrances/exits, new low-vibration track, and new mechanical, electrical, plumbing, fire protection, and communication systems. The contract for renovation of the station was awarded to Judlau Contracting on January 13, 2011. On September 22, 2011,
8568-593: The City of New York since the inception of the IND and the other divisions beginning in 1948 are identified by the letter "R" followed by a number; e.g.: R32 . This number is the contract number under which the cars were purchased. Cars with nearby contract numbers (e.g.: R1 through R9 , or R26 through R29 , or R143 through R179 ) may be relatively identical, despite being purchased under different contracts and possibly built by different manufacturers. From 1999 to 2019,
8704-842: The IND line rises to the upper level of the tunnel, as both IND tracks are located on the upper level of 63rd Street Tunnel for the trip under the East River . The two tracks on the lower level of that tunnel are being connected to the Long Island Rail Road (LIRR) via the East Side Access project. The project brings trains from the LIRR's Main Line to Grand Central Terminal . The lower tunnels eventually opened in January 2023, after years of delays. East of this station on
8840-465: The IND side of the tracks from 1989 to 2013. New platform signs for the Second Avenue Subway were erected in December 2016. When the contract was awarded, renovation was estimated to be finished by May 2014, but the completion date had been pushed back constantly, and as of August 2015, the completion date was Spring 2016, though this was later pushed back to Summer 2016. As of July 2015, the renovation
8976-587: The IND tunnels having to go under the East River a short distance to the east. At the original (1989) mezzanine at Lexington Avenue, there are a total of eight escalators, four staircases and two elevators from the fare mezzanine to platform level. There is an in-building entrance with two escalators and a staircase, and another, stand-alone entrance with a staircase, from the street to the Lexington Avenue fare mezzanine. Two additional staircases between
9112-426: The Lexington Avenue mezzanine, as well as on the corridors to platform level, were kept for the time being. In spring 2012, temporary blue walls separating most of the IND and BMT sides were erected for the duration of construction. Both sides had large white and grey panels on the track side, as well as "temporary" tiles that said "Lex 63" at regular intervals. This differed vastly from the small beige tiles that were on
9248-709: The Middle Ages, crosses a mountain ridge. In the Gaza Strip , the network of tunnels was used by Jewish strategists as rock-cut shelters, in first links to Judean resistance against Roman rule in the Bar Kokhba revolt during the 2nd century AD. A major tunnel project must start with a comprehensive investigation of ground conditions by collecting samples from boreholes and by other geophysical techniques. An informed choice can then be made of machinery and methods for excavation and ground support, which will reduce
9384-464: The Program for Action, the Lexington Avenue–63rd Street station contained technologically advanced features such as air-cooling, noise insulation, CCTV monitors, public announcement systems, electronic platform signage, and escalator and elevator entrances. From the fare control , there are two long escalators and a stair to an intermediate level, and then two shorter escalators and a pair of stairs to
9520-416: The Second Avenue Subway opened, the station had 5,033,950 boardings, making it the 93rd most used station in the 422-station system. This amounted to an average of 16,988 passengers per weekday. After the Second Avenue Subway opened, there was a combined average of 28,150 boardings and transfers every weekday. In 2017, Lexington Avenue–63rd Street recorded 6,389,408 entries, making it the 70th busiest station in
9656-455: The Second Avenue Subway renovations, Jean Shin created an artwork called Elevated as part of the MTA Arts & Design program. Shin used archival photographs of the 2nd and 3rd Avenue Elevated trains (known as els) to create compositions in ceramic tile , glass mosaic , and laminated glass . The imagery is manipulated and re-configured with each level having a different design. On
9792-520: The Third Avenue mezzanine to both platform levels at the eastern ends of both platforms, replacing the originally planned escalators, as they use the space more effectively. On each platform level, both waiting areas have a piece of the Jean Shin artwork "Elevated." The Third Avenue entrance and mezzanine opened on December 30, 2016. When this station was opened in 1989, it had no artwork. During
9928-599: The United States, the NFPA definition of a tunnel is "An underground structure with a design length greater than 23 m (75 ft) and a diameter greater than 1,800 millimetres (5.9 ft)." The word "tunnel" comes from the Middle English tonnelle , meaning "a net", derived from Old French tonnel , a diminutive of tonne ("cask"). The modern meaning, referring to an underground passageway, evolved in
10064-615: The abandoned LIRR Rockaway Beach Branch (now the IND Rockaway Line ), which opened in 1955. Two stations ( 57th Street and Grand Street ) were part of the Chrystie Street Connection , and opened in 1968; the Harlem–148th Street terminal opened that same year in an unrelated project. Six were built as part of a 1968 plan : three on the Archer Avenue Lines , opened in 1988, and three on
10200-526: The arriving train to identify it. There are several common platform configurations. On a double track line, a station may have one center island platform used for trains in both directions, or two side platforms , one for each direction. For lines with three or four tracks with express service, local stops will have side platforms and the middle one or two tracks will not stop at the station. On these lines, express stations typically have two island platforms, one for each direction. Each island platform provides
10336-400: The blocky nature of rocks, the exact location of fault zones, or the stand-up times of softer ground. This may be a particular concern in large-diameter tunnels. To give more information, a pilot tunnel (or "drift tunnel") may be driven ahead of the main excavation. This smaller tunnel is less likely to collapse catastrophically should unexpected conditions be met, and it can be incorporated into
10472-485: The city's severe fiscal crisis , the BMT 63rd Street Line side, the northern tracks, basically led to a non-existent subway line. The BMT side was abandoned and walled off with a temporary orange brick wall, and a false ceiling was placed on the upper level's IND 63rd Street Line side, the southern side. Finishing touches were only applied to the IND side of the station. The tracks on the closed-off BMT side were used only to store trains outside of rush hour. The remainder of
10608-410: The complexity of the system (Manhattan being the smallest borough, but having the most services), but they do show major city streets as an aid to navigation. The newest edition took effect on June 27, 2010, and makes Manhattan bigger and Staten Island smaller, with minor tweaks happening to the map when more permanent changes occur. Earlier diagrams of the subway, the first being produced in 1958, had
10744-502: The concrete mix to improve lining strength. This creates a natural load-bearing ring, which minimizes the rock's deformation . By special monitoring the NATM method is flexible, even at surprising changes of the geomechanical rock consistency during the tunneling work. The measured rock properties lead to appropriate tools for tunnel strengthening . In pipe jacking , hydraulic jacks are used to push specially made pipes through
10880-425: The correct platform without having to cross the street before entering. Inside mezzanines are fare control areas, where passengers physically pay their fare to enter the subway system. In many older stations, the fare control area is at platform level with no mezzanine crossovers. Many elevated stations also have platform-level fare control with no common station house between directions of service. Upon entering
11016-409: The entire tunnelling process, reducing tunnelling costs. In certain predominantly urban applications, tunnel boring is viewed as a quick and cost-effective alternative to laying surface rails and roads. Expensive compulsory purchase of buildings and land, with potentially lengthy planning inquiries, is eliminated. Disadvantages of TBMs arise from their usually large size – the difficulty of transporting
11152-584: The exceptions being the G train, the Franklin Avenue Shuttle , and the Rockaway Park Shuttle . Large portions of the subway outside Manhattan are elevated, on embankments , or in open cuts , and a few stretches of track run at ground level; 40% of track is above ground. Many lines and stations have both express and local services. These lines have three or four tracks. Normally, the outer two are used by local trains, while
11288-441: The final tunnel or used as a backup or emergency escape passage. Alternatively, horizontal boreholes may sometimes be drilled ahead of the advancing tunnel face. Other key geotechnical factors: For water crossings, a tunnel is generally more costly to construct than a bridge. However, both navigational and traffic considerations may limit the use of high bridges or drawbridges intersecting with shipping channels, necessitating
11424-482: The five-cent fare of the time, or 10¢ ($ 3 in 2023 dollars ). In 1940, the city bought the two private systems. Some elevated lines ceased service immediately while others closed soon after. Integration was slow, but several connections were built between the IND and BMT. These now operate as one division, called the B Division . Since the former IRT tunnels are narrower, have sharper curves, and shorter station platforms, they cannot accommodate B Division cars, and
11560-400: The former IRT remains its own division, the A Division . Many passenger transfers between stations of all three former companies have been created, allowing the entire network to be treated as a single unit. During the late 1940s, the system recorded high ridership, and on December 23, 1946, the system-wide record of 8,872,249 fares was set. The New York City Transit Authority (NYCTA),
11696-405: The ground behind a TBM or shield. This method is commonly used to create tunnels under existing structures, such as roads or railways. Tunnels constructed by pipe jacking are normally small diameter bores with a maximum size of around 3.2 metres (10 ft). Box jacking is similar to pipe jacking, but instead of jacking tubes, a box-shaped tunnel is used. Jacked boxes can be a much larger span than
11832-559: The hurricane included the restoration of the new South Ferry station from 2012 to 2017; the full closure of the Montague Street Tunnel from 2013 to 2014; and the partial 14th Street Tunnel shutdown from 2019 to 2020. Annual ridership on the New York City Subway system, which totaled nearly 1.7 billion in 2019, declined dramatically during the COVID-19 pandemic and did not surpass one billion again until 2022. When
11968-640: The immersed-tube type), while deep tunnels are excavated, often using a tunnelling shield . For intermediate levels, both methods are possible. Large cut-and-cover boxes are often used for underground metro stations, such as Canary Wharf tube station in London. This construction form generally has two levels, which allows economical arrangements for ticket hall, station platforms, passenger access and emergency egress, ventilation and smoke control, staff rooms, and equipment rooms. The interior of Canary Wharf station has been likened to an underground cathedral, owing to
12104-435: The inevitable smoke and steam. A major disadvantage of cut-and-cover is the widespread disruption generated at the surface level during construction. This, and the availability of electric traction, brought about London Underground's switch to bored tunnels at a deeper level towards the end of the 19th century. Prior to the replacement of manual excavation by the use of boring machines, Victorian tunnel excavators developed
12240-769: The inner one or two are used by express trains. As of 2018 , the New York City Subway's budgetary burden for expenditures was $ 8.7 billion, supported by collection of fares, bridge tolls, and earmarked regional taxes and fees, as well as direct funding from state and local governments. Alfred Ely Beach built the first demonstration for an underground transit system in New York City in 1869 and opened it in February 1870. His Beach Pneumatic Transit only extended 312 feet (95 m) under Broadway in Lower Manhattan operating from Warren Street to Murray Street and exhibited his idea for an atmospheric railway as
12376-468: The large TBM to the site of tunnel construction, or (alternatively) the high cost of assembling the TBM on-site, often within the confines of the tunnel being constructed. There are a variety of TBM designs that can operate in a variety of conditions, from hard rock to soft water-bearing ground. Some TBMs, the bentonite slurry and earth-pressure balance types, have pressurized compartments at the front end, allowing them to be used in difficult conditions below
12512-463: The line at the beginning of 2017. Many rapid transit systems run relatively static routings, so that a train "line" is more or less synonymous with a train "route". In New York City, routings change often, for various reasons. Within the nomenclature of the subway , the "line" describes the physical railroad track or series of tracks that a train "route" uses on its way from one terminal to another. "Routes" (also called "services") are distinguished by
12648-550: The line was to connect to the IND Sixth Avenue and BMT Broadway Lines. The IND line was to be built on the upper portion of the bi-level 63rd Street Tunnel , which would run under the East River. On the south side of the station are the IND 63rd Street Line tracks, which continue from the IND Sixth Avenue Line, while on the north side of the station are the BMT 63rd Street Line tracks, which continue from
12784-527: The line's only stop in Queens . On July 22, 2001, concurrent with the closure of the IND Sixth Avenue Line tracks of the Manhattan Bridge, B and Q train service to this station ceased and was replaced with a full-time shuttle. At this time, the northern tracks of the bridge were closed to allow for bridge repairs to take place. The southern BMT Broadway Line tracks were reopened allowing for half of
12920-403: The lines and leased them to the companies. The first line of the city-owned and operated Independent Subway System (IND) opened in 1932. This system was intended to compete with the private systems and allow some of the elevated railways to be torn down but stayed within the core of the city due to its small startup capital. This required it to be run 'at cost', necessitating fares up to double
13056-629: The lower deck with automobiles above, now converted to one-way road vehicle traffic on each deck. In Turkey, the Eurasia Tunnel under the Bosphorus , opened in 2016, has at its core a 5.4 km (3.4 miles) two-deck road tunnel with two lanes on each deck. Additionally, in 2015 the Turkish government announced that it will build three -level tunnel, also under the Bosporus. The tunnel
13192-419: The next station to the south is 57th Street for F and <F> trains and 57th Street–Seventh Avenue for N and Q trains. From the Lexington Avenue entrance, there are two short escalators and a stair from the northwest corner, a staircase from the southwest corner, and a short elevator hidden around the corner from the escalators. As with other stations constructed as part of
13328-399: The northbound direction only. The station has two platform levels; trains headed southbound to downtown and Brooklyn use the upper level, while trains headed northbound to uptown and Queens use the lower level. This is one of the deepest stations in the subway system, requiring several banks of long escalators or elevators. Construction started at this station in 1969, but as a result of
13464-483: The older method of tunnelling in compressed air, with an airlock/decompression chamber some way back from the TBM, which required operators to work in high pressure and go through decompression procedures at the end of their shifts, much like deep-sea divers . In February 2010, Aker Wirth delivered a TBM to Switzerland, for the expansion of the Linth–Limmern Power Stations located south of Linthal in
13600-540: The operation of empty and loaded trains at the same time. The temporary way is replaced by the permanent way at completion, thus explaining the term " Perway ". The vehicles or traffic using a tunnel can outgrow it, requiring replacement or enlargement: An open building pit consists of a horizontal and a vertical boundary that keeps groundwater and soil out of the pit. There are several potential alternatives and combinations for (horizontal and vertical) building pit boundaries. The most important difference with cut-and-cover
13736-459: The original 1989 station, along with 4 exits to Third Avenue that were built as part of the Second Avenue Subway. The elevator between the street level and mezzanine at Lexington Avenue was replaced in August 2015. This station has two ancillary buildings. Ancillary 1 is at 124 East 63rd Street, and Ancillary 2 is on the north side of 63rd Street between Third and Lexington Avenues. In 2016, before
13872-404: The perception of being more geographically inaccurate than the diagrams today. The design of the subway map by Massimo Vignelli , published by the MTA between 1972 and 1979, has become a modern classic but the MTA deemed the map flawed due to its placement of geographical elements. A late night-only version of the map was introduced on January 30, 2012. On September 16, 2011, the MTA introduced
14008-535: The platform levels are at the eastern end of platforms, past the elevator. A third staircase between the platform levels has been constructed. An eastern mezzanine at Third Avenue, along with stairwells to the platforms, was partially completed in the 1980s but not opened along with the rest of the station. A shaftway, identical to the one on the Lexington Avenue side, contained a single stairway, as well as beams that may have been intended to support escalators. The stairway led up to an upper mezzanine whose street entrance
14144-433: The platform was removed, while beige-white wall tiles were installed on the station walls adjacent to the tracks. The unopened entrance at Third Avenue was fitted with multiple elevators, and the station's false ceiling was removed. The first phase of the Second Avenue Subway opened on January 1, 2017, and ridership has increased at the station since then. The current 63rd Street lines were the final version of proposals for
14280-418: The platforms using four high-speed elevators , similar to the layout of several other deep-level stations. These elevators are the most space-efficient means of transporting people. These entrances opened on December 30, 2016. The MTA inaugurated Phase 1 of Second Avenue Subway service on January 1, 2017. This station opened on October 29, 1989, along with the entire IND 63rd Street Line. The Q train served
14416-610: The project faced extensive delays. As early as 1976, the Program for Action had been reduced to seven stations on the Archer Avenue and 63rd Street lines and was not projected to be complete for another decade. By October 1980, officials considered stopping construction on the 63rd Street line. The MTA voted in 1984 to connect the Queens end of the tunnel to the local tracks of the IND Queens Boulevard Line at
14552-522: The project is completed. If a tunnel is going to be long, multiple shafts at various locations may be bored so that entrance to the tunnel is closer to the unexcavated area. Once construction is complete, construction access shafts are often used as ventilation shafts , and may also be used as emergency exits. The New Austrian Tunnelling method (NATM)—also referred to as the Sequential Excavation Method (SEM) —was developed in
14688-490: The proper machinery must be selected. Large infrastructure projects require millions or even billions of dollars, involving long-term financing, usually through issuance of bonds . The costs and benefits for an infrastructure such as a tunnel must be identified. Political disputes can occur, as in 2005 when the US House of Representatives approved a $ 100 million federal grant to build a tunnel under New York Harbor. However,
14824-437: The record, over 6.2 million, was set on October 29, 2015. The system is also one of the world's longest. Overall, the system contains 248 miles (399 km) of routes, translating into 665 miles (1,070 km) of revenue track and a total of 850 miles (1,370 km) including non-revenue trackage . Of the system's 28 routes or "services" (which usually share track or "lines" with other services), 25 pass through Manhattan,
14960-504: The rest reopened in September 2002, along with service south of Chambers Street. Cortlandt Street reopened in September 2018. In October 2012, Hurricane Sandy flooded several underwater tunnels and other facilities near New York Harbor , as well as trackage over Jamaica Bay . The immediate damage was fixed within six months, but long-term resiliency and rehabilitation projects continued for several years. The recovery projects after
15096-482: The risk of encountering unforeseen ground conditions. In planning the route, the horizontal and vertical alignments can be selected to make use of the best ground and water conditions. It is common practice to locate a tunnel deeper than otherwise would be required, in order to excavate through solid rock or other material that is easier to support during construction. Conventional desk and preliminary site studies may yield insufficient information to assess such factors as
15232-405: The routes proposed over the decades have never seen construction, discussion remains strong to develop some of these lines, to alleviate existing subway capacity constraints and overcrowding, the most notable being the proposals for the Second Avenue Subway . Plans for new lines date back to the early 1910s, and expansion plans have been proposed during many years of the system's existence. After
15368-403: The routes that would normally run on these lines. The Transit Authority announces planned service changes through its website, via placards that are posted on station and interior subway-car walls, and through its Twitter page. Current official transit maps of the New York City Subway are based on a 1979 design by Michael Hertz Associates . The maps are not geographically accurate due to
15504-542: The sheer size of the excavation. This contrasts with many traditional stations on London Underground , where bored tunnels were used for stations and passenger access. Nevertheless, the original parts of the London Underground network, the Metropolitan and District Railways, were constructed using cut-and-cover. These lines pre-dated electric traction and the proximity to the surface was useful to ventilate
15640-414: The south east-corner entrance at Third Avenue, there are ceramic tiles depicting construction beams and the cranes that dismantled the el. At the mezzanine, a mosaic reveals the sky where the train had previously been present. The platform level features semi-transparent and reflective glass depicting vintage scenes of the neighborhood. There are 3 exits leading to Lexington Avenue that were built as part of
15776-405: The station at all times. The <F> train serves the station northbound during AM rush hours and southbound during PM rush hours. In addition, limited rush-hour N trains and one northbound AM rush-hour R train serve the station. The next station to the north is Roosevelt Island for F and <F> trains and 72nd Street for N , Q , and R trains, while
15912-548: The station on weekdays and the B train stopped there on weekends and late nights; both services used the Sixth Avenue Line. For the first couple of months after the station opened, the JFK Express to Kennedy Airport also served the station until it was discontinued on April 15, 1990. The tunnel had gained notoriety as the "tunnel to nowhere" both during its planning and after its opening, with 21st Street being
16048-508: The subway system runs on surface or elevated tracks, including steel or cast-iron elevated structures , concrete viaducts , embankments , open cuts and surface routes. As of 2019 , there are 168 miles (270 km) of elevated tracks. All of these construction methods are completely grade-separated from road and pedestrian crossings, and most crossings of two subway tracks are grade-separated with flying junctions . The sole exceptions of at-grade junctions of two lines in regular service are
16184-483: The tracks on the bridge to remain open. On December 16, 2001, the 63rd Street Connector, which was built to connect the IND 63rd Street Line and the IND Queens Boulevard Line officially opened. Since then, the F train has been rerouted to serve this station at all times. When this happened, a free MetroCard out-of-system transfer to the Lexington Avenue–59th Street station was added. This was to provide
16320-594: The trains turn north and run along the Second Avenue Line to 96th Street . This new service pattern was put into effect on January 1, 2017. From August 28, 2023, to April 1, 2024, F trains were rerouted via the 53rd Street Tunnel between Queens and Manhattan due to track replacement and other repairs in the 63rd Street Tunnel, and an F shuttle train ran between Lexington Avenue-63rd Street and 21st Street–Queensbridge at all times except late nights, stopping at Roosevelt Island . The F and Q trains serve
16456-400: The tunnel drive, the depth of the tunnel, the logistics of supporting the tunnel excavation, the final use and the shape of the tunnel and appropriate risk management. There are three basic types of tunnel construction in common use. Cut-and-cover tunnels are constructed in a shallow trench and then covered over. Bored tunnels are constructed in situ, without removing the ground above. Finally,
16592-428: The two most common being bored tunnels or immersed tubes , examples are Bjørvika Tunnel and Marmaray . Submerged floating tunnels are a novel approach under consideration; however, no such tunnels have been constructed to date. During construction of a tunnel it is often convenient to install a temporary railway, particularly to remove excavated spoil , often narrow gauge so that it can be double track to allow
16728-681: The underground portions of the subway had yet to be built, several above-ground segments of the modern-day New York City Subway system were already in service by then. The oldest structure still in use opened in 1885 as part of the BMT Lexington Avenue Line in Brooklyn and is now part of the BMT Jamaica Line . The oldest right-of-way, which is part of the BMT West End Line near Coney Island Creek ,
16864-542: The union's founding, there have been three union strikes over contract disputes with the MTA: 12 days in 1966 , 11 days in 1980 , and three days in 2005 . By the 1970s and 1980s, the New York City Subway was at an all-time low. Ridership had dropped to 1910s levels, and graffiti and crime were rampant. Maintenance was poor, and delays and track problems were common. Still, the NYCTA managed to open six new subway stations in
17000-721: The work. The foundations of tall buildings often ran near the subway construction, and in some cases needed underpinning to ensure stability. This method worked well for digging soft dirt and gravel near the street surface. Tunnelling shields were required for deeper sections, such as the Harlem and East River tunnels, which used cast-iron tubes. Rock or concrete-lined tunnels were used on segments from 33rd to 42nd streets under Park Avenue ; 116th to 120th Streets under Broadway ; 145th to Dyckman Streets (Fort George) under Broadway and St. Nicholas Avenue ; and 96th Street and Broadway to Central Park North and Lenox Avenue . About 40% of
17136-533: The year throughout most of its history, barring emergencies and disasters. By annual ridership, the New York City Subway is the busiest rapid transit system in both the Western Hemisphere and the Western world , as well as the eleventh-busiest rapid transit rail system in the world. The subway carried 2,027,286,000 unlinked, non-unique riders in 2023. Daily ridership has been calculated since 1985;
17272-538: The years, the MTA has been involved in a number of lawsuits over the lack of accessibility in its stations. The Eastern Paralyzed Veterans Association filed what may have been the first of these suits in 1979, based on state law. The lawsuits have relied on a number of different legal bases, but most have centered around the MTA's failure to include accessibility as a part of its plans for remodeling various stations. As of January 2022 , ADA-accessibility projects are expected to be started or completed at 51 stations as part of
17408-414: Was 90% complete, and as of June 2016, 98% complete with only cosmetic finishes and power upgrades to be completed. To accommodate the increased patronage expected after the beginning of Second Avenue Subway service, the MTA built four new entrances at the intersection of Third Avenue and 63rd Street, leading to a new mezzanine at the eastern end of the station. Passengers travel between the new mezzanine and
17544-575: Was constructed to provide a second harbour crossing and to alleviate traffic congestion on the Sydney Harbour Bridge , without spoiling the iconic view. Other reasons for choosing a tunnel instead of a bridge include avoiding difficulties with tides, weather, and shipping during construction (as in the 51.5-kilometre or 32.0-mile Channel Tunnel ), aesthetic reasons (preserving the above-ground view, landscape, and scenery), and also for weight capacity reasons (it may be more feasible to build
17680-415: Was hidden beyond an orange tiled false wall. Switches on both levels connected the lines to the west of the station. East of this station on the IND side are turnouts heading southwest for a connection to Phase 3 of the Second Avenue Subway , clearly visible from a moving train, which would allow future service from Queens towards Midtown and Downtown Manhattan . Also to the east, the eastbound track of
17816-879: Was in use in 1864 as a steam railroad called the Brooklyn, Bath and Coney Island Rail Road . The first underground line of the subway opened on October 27, 1904, almost 36 years after the opening of the first elevated line in New York City (which became the IRT Ninth Avenue Line ). The 9.1-mile (14.6 km) subway line, then called the "Manhattan Main Line", ran from City Hall station northward under Lafayette Street (then named Elm Street) and Park Avenue (then named Fourth Avenue) before turning westward at 42nd Street . It then curved northward again at Times Square , continuing under Broadway before terminating at 145th Street station in Harlem . Its operation
17952-586: Was leased to the Interborough Rapid Transit Company (IRT), and over 150,000 passengers paid the 5-cent fare ($ 2 in 2023 dollars ) to ride it on the first day of operation. By the late 1900s and early 1910s, the lines had been consolidated into two privately owned systems, the IRT and the Brooklyn Rapid Transit Company (BRT, later Brooklyn–Manhattan Transit Corporation , BMT). The city built most of
18088-682: Was named the Construction Achievement Project of the Year by the Metropolitan Section of the American Society of Civil Engineers . It opened for passenger service on October 29, 1989, along with the rest of the IND 63rd Street Line. Upon the station's opening, it operated as a typical one-track, one- side platform station on each level, with only the IND side in use, while the BMT side of each level
18224-474: Was sealed off. This area was renovated as part of the Second Avenue Subway construction, and the shaftway was demolished. The new entrances constructed for the Second Avenue Subway added two new staircases, two new escalators, and five new elevators (one elevator from street level to mezzanine, and four elevators from the mezzanine to the platforms). As of April 2016, the new entrances, escalators, and elevators had been completed. The bank of four elevators leads from
18360-732: Was superseded by the Madrid M30 ringroad , Spain, and the Chong Ming tunnels in Shanghai , China. All of these machines were built at least partly by Herrenknecht . As of August 2013 , the world's largest TBM was " Big Bertha ", a 17.5-metre (57.5 ft) diameter machine built by Hitachi Zosen Corporation , which dug the Alaskan Way Viaduct replacement tunnel in Seattle, Washington (US). A temporary access shaft
18496-410: Was to be part of the city-operated IND, and was to comprise almost 1 ⁄ 3 of the current subway system. By 1939, with unification planned, all three systems were included within the plan, which was ultimately never carried out. Many different plans were proposed over the years of the subway's existence, but expansion of the subway system mostly stopped during World War II . Though most of
#816183