In railroad structures, and rail terminology, a wye or triangular junction is a triangular joining arrangement of three rail lines with a railroad switch at each corner connecting to the incoming lines. A turning wye is a specific case.
Since the opening of the original New York City Subway line in 1904, and throughout the subway's history, various official and planning agencies have proposed numerous extensions to the subway system. The first major expansion of the subway system was the Dual Contracts, a set of agreements between the City of New York and the IRT and the BRT. The system was expanded into the outer reaches of the Bronx, Brooklyn, and Queens, and it provided for the construction of important lines in Manhattan. This one expansion of the system provided for a majority of today's system.
The Red Line is a rapid transit line in Chicago, run by the Chicago Transit Authority (CTA) as part of the Chicago "L" system. It is the busiest line on the "L" system, with an average of 93,457 passengers boarding each weekday in 2022. The route is 26 miles (42 km) long with a total of 33 stations. It runs elevated from the Howard station in the Rogers Park neighborhood on the North Side, through a subway on the Near North Side, Downtown, and the South Loop, and then through the Dan Ryan Expressway median to 95th/Dan Ryan in the Roseland neighborhood on the South Side.
The Red Line is a light rail line in Dallas, Texas operated by the Dallas Area Rapid Transit system. It began operations in June 1996, and is one of two inaugural light rail lines in the DART Light Rail system alongside the Blue Line.
The Orange Line is a rapid transit line in Chicago, Illinois, operated by the Chicago Transit Authority (CTA) as part of the Chicago "L" system. It is approximately 13 miles (21 km) long and runs on elevated and at grade tracks and serves the Southwest Side, running from the Loop to Midway International Airport. As of 2022, an average of 15,098 riders board Orange Line trains on weekdays.
A junction, in the context of rail transport, is a place at which two or more rail routes converge or diverge. This implies a physical connection between the tracks of the two routes, provided by points and signalling. Junctions are important for rail systems, their installation into a rail system can expand route capacity, and have a powerful impact upon on-time performance.
The Broad Street Line (BSL), also known as the Broad Street subway (BSS), Orange Line, or Broad Line, is a subway line owned by the city of Philadelphia and operated by the Southeastern Pennsylvania Transportation Authority (SEPTA). The line runs primarily north-south from the Fern Rock Transportation Center in North Philadelphia through Center City Philadelphia to NRG station at Pattison Avenue in South Philadelphia; the latter station provides access to the stadiums and arenas for the city's major professional sports teams at the South Philadelphia Sports Complex, about a quarter mile away. It is named for Broad Street, under which the line runs for almost its entire length.
In civil engineering, grade separation is a method of aligning a junction of two or more surface transport axes at different heights (grades) so that they will not disrupt the traffic flow on other transit routes when they cross each other. The composition of such transport axes does not have to be uniform; it can consist of a mixture of roads, footpaths, railways, canals, or airport runways. Bridges, tunnels, or a combination of both can be built at a junction to achieve the needed grade separation.
The DeKalb Avenue station is an interchange station on the BMT Brighton Line and BMT Fourth Avenue Line of the New York City Subway, located at the intersection of DeKalb and Flatbush Avenues in Downtown Brooklyn. It is served by the Q and R trains at all times, the B train on weekdays, and the D and N trains during late nights. During rush hours only, a few W train trips also serve this station.
The Lenox Avenue Line is a line of the New York City Subway, part of the A Division, mostly built as part of the first subway line. Located in Manhattan, New York City, it consists of six stations between Central Park North–110th Street and Harlem–148th Street, all of which are situated within the neighborhood of Harlem in Upper Manhattan.
A double-track railway usually involves running one track in each direction, compared to a single-track railway where trains in both directions share the same track.
The Pleasant Street incline or Pleasant Street portal was the southern access point for the Tremont Street subway in Boston, Massachusetts, which became part of the Green Line after the incline was closed. The portal and the section of tunnel connecting it to Boylston served streetcars from 1897 to 1901, Main Line Elevated trains from 1901 to 1908, and streetcars again from 1908 to 1962. The Pleasant Street incline is now abandoned, but plans have been floated at various times to reuse it.
The A Line is a 48.5-mile (78.1 km) light rail line in Los Angeles County, California. The A Line runs east-west between Azusa and Pasadena, then north-south between Pasadena and Long Beach, via Downtown Los Angeles. The A Line is currently the longest light rail line in the world.
A level junction is a railway junction that has a track configuration in which merging or crossing railroad lines provide track connections with each other that require trains to cross over in front of opposing traffic at grade.
The Pittsburgh Light Rail is a 26.2-mile (42.2 km) light rail system in Pittsburgh, Pennsylvania, and surrounding suburbs. It operates as a deep-level subway in Downtown Pittsburgh, but runs mostly at-grade in the suburbs south of the city. The system is largely linear in a north-south direction, with one terminus near Pittsburgh's central business district and two termini in the South Hills. The system is owned and operated by Pittsburgh Regional Transit. The T is one of the surviving first-generation streetcar systems in North America, with the oldest portions of the network dating back to 1903 and the Pittsburgh Railways. It is also one of only three light rail systems in the United States that continues to use the broad 5 ft 2+1⁄2 in Pennsylvania Trolley Gauge on its lines instead of the 4 ft 8+1⁄2 instandard gauge. In 2022, the system had a ridership of 2,429,500.
A quadruple-track railway is a railway line consisting of four parallel tracks with two tracks used in each direction. Quadruple-track railways can handle large amounts of traffic, and so are used on very busy routes or sections. Such conversion is referred to as "quadruplication".
France has a large network of high-speed rail lines. As of June 2021, the French high-speed rail network comprises 2,800 km (1,740 mi) of tracks, making it one of the largest in Europe and the world. As of early 2023, new lines are being constructed or planned. The first French high-speed railway, the LGV Sud-Est, linking the suburbs of Paris and Lyon, opened in 1981 and was at that time the only high-speed rail line in Europe.
Zoo Junction is a junction on Amtrak's Northeast Corridor in Philadelphia, Pennsylvania, where the Northeast Corridor meets the Keystone Corridor, previously known as the Pennsylvania Railroad's main line.
The North Bergen Yard is freight rail yard and intermodal terminal in North Bergen, New Jersey parallel to Tonnelle Avenue between 49th and 69th Streets. Located within the North Jersey Shared Assets Area, the facility is part of CSX Transportation (CSXT) and the origination point of its CSX River Subdivision at the southern end of the Albany Division. On its west side, the New York, Susquehanna and Western Railway (NYSW) runs the length of the yard and operates a bulk transloading operation immediately adjacent to it.
