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Split platform
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Split platform
A split platform, stacked platform, or separate platform is a station that has a platform for each track, split onto two or more levels. This configuration allows a narrower station plan (or footprint) horizontally, at the expense of a deeper (or higher) vertical elevation, because sets of tracks and platforms are stacked above each other. Where two rail lines cross or run parallel for a time, split platforms are sometimes used in a hybrid arrangement that allows for convenient cross-platform interchange between trains running in the same general direction.
On the London Underground, to minimise the risk of subsidence, the tunnel alignments largely followed the roads on the surface and avoided passing under buildings. If a road was too narrow to allow the construction of side-by-side tunnels, they would be aligned one above the other, so that a number of stations have platforms at different levels. It is also sometimes used if the line branches from the station, so diverting tunnels or tracks do not intersect each other.
Examples of split platform layout in the United States are Rosslyn on the Washington Metro's Blue, Silver and Orange Lines; Pentagon on the Washington Metro's Blue and Yellow Lines; North Station on the MBTA Green and Orange Lines; Harvard and Porter stations on the Boston-Cambridge MBTA Red Line. Split platforms are also at downtown Oakland, California on BART's 12th and 19th Street stations, as well as in Los Angeles Metro Rail's Wilshire/Vermont station. MARTA's Ashby station uses the configuration to separate the eastbound and westbound platforms.
In the New York City Subway, Nostrand Avenue, Kingston Avenue and Utica Avenue stations on the IRT Eastern Parkway Line have two tracks on each level, with each of the two levels serving trains in one direction. Further north on the Eastern Parkway line, Borough Hall also has split platforms. Also, stations on the IND Eighth Avenue Line have split stacked platforms between 59th Street – Columbus Circle and Cathedral Parkway – 110th Street due to the proximity of the line to Central Park. In other stations like Fulton Street, Borough Hall, and Fifth Avenue / 53rd Street, platforms are stacked due to the narrowness of the street directly above the station. One notable station, Wilson Avenue on the BMT Canarsie Line, has one elevated platform and one at-grade platform, due to the narrowness of the line's right-of-way.
In Canada, split platforms on the Montreal Metro are located at De l'Église and Charlevoix, as well as on the Blue Line at Jean-Talon, while Snowdon and Lionel-Groulx have a hybrid layout where the two directions on each line are split from each other but share an island platform with the other line to allow for cross-platform transfers. They are also found on Vancouver's SkyTrain, at the stations in the Dunsmuir Tunnel and at the King Edward station on the Canada Line.
The London Underground uses split platform layouts on the deep tube lines, namely the Bakerloo, Central, Jubilee, Northern and Piccadilly lines.
Sant'Agostino station on line M2 of the Milan Metro uses the layout, as do all stations between Crocetta and Turati on line M3.
On Munich Marienplatz Station the Munich S-Bahn (suburban trains) are on two separate levels, where westbound trains depart from the lower level, eastbound trains from the upper level. Below the westbound level there is an interchange to the metro lines U3 and U6 in North-South direction.
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Split platform
A split platform, stacked platform, or separate platform is a station that has a platform for each track, split onto two or more levels. This configuration allows a narrower station plan (or footprint) horizontally, at the expense of a deeper (or higher) vertical elevation, because sets of tracks and platforms are stacked above each other. Where two rail lines cross or run parallel for a time, split platforms are sometimes used in a hybrid arrangement that allows for convenient cross-platform interchange between trains running in the same general direction.
On the London Underground, to minimise the risk of subsidence, the tunnel alignments largely followed the roads on the surface and avoided passing under buildings. If a road was too narrow to allow the construction of side-by-side tunnels, they would be aligned one above the other, so that a number of stations have platforms at different levels. It is also sometimes used if the line branches from the station, so diverting tunnels or tracks do not intersect each other.
Examples of split platform layout in the United States are Rosslyn on the Washington Metro's Blue, Silver and Orange Lines; Pentagon on the Washington Metro's Blue and Yellow Lines; North Station on the MBTA Green and Orange Lines; Harvard and Porter stations on the Boston-Cambridge MBTA Red Line. Split platforms are also at downtown Oakland, California on BART's 12th and 19th Street stations, as well as in Los Angeles Metro Rail's Wilshire/Vermont station. MARTA's Ashby station uses the configuration to separate the eastbound and westbound platforms.
In the New York City Subway, Nostrand Avenue, Kingston Avenue and Utica Avenue stations on the IRT Eastern Parkway Line have two tracks on each level, with each of the two levels serving trains in one direction. Further north on the Eastern Parkway line, Borough Hall also has split platforms. Also, stations on the IND Eighth Avenue Line have split stacked platforms between 59th Street – Columbus Circle and Cathedral Parkway – 110th Street due to the proximity of the line to Central Park. In other stations like Fulton Street, Borough Hall, and Fifth Avenue / 53rd Street, platforms are stacked due to the narrowness of the street directly above the station. One notable station, Wilson Avenue on the BMT Canarsie Line, has one elevated platform and one at-grade platform, due to the narrowness of the line's right-of-way.
In Canada, split platforms on the Montreal Metro are located at De l'Église and Charlevoix, as well as on the Blue Line at Jean-Talon, while Snowdon and Lionel-Groulx have a hybrid layout where the two directions on each line are split from each other but share an island platform with the other line to allow for cross-platform transfers. They are also found on Vancouver's SkyTrain, at the stations in the Dunsmuir Tunnel and at the King Edward station on the Canada Line.
The London Underground uses split platform layouts on the deep tube lines, namely the Bakerloo, Central, Jubilee, Northern and Piccadilly lines.
Sant'Agostino station on line M2 of the Milan Metro uses the layout, as do all stations between Crocetta and Turati on line M3.
On Munich Marienplatz Station the Munich S-Bahn (suburban trains) are on two separate levels, where westbound trains depart from the lower level, eastbound trains from the upper level. Below the westbound level there is an interchange to the metro lines U3 and U6 in North-South direction.
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