Crossover

Crossover refers to the way between the two main rails. It is a kind of sideline and is usually used for dispatching or midway station turning.

There is also a double tandem crossover that allows the trains to switch from any of the main rails to the opposite, usually among the terminus.

MRT
Except as noted, they are crossover lines.
 * East West Line
 * Pasir Ris - Tampines, south of Pasir Ris MRT Station
 * Tampines - Simei, south of Tampines MRT Station
 * Simei - Tanah Merah, for connection to Changi Depot and Changi Airport Line
 * Tanah Merah - Bedok, west of Tanah Merah MRT Station
 * Eunos - Paya Lebar, west of Eunos MRT Station
 * Paya Lebar - Aljunied, east of Aljunied MRT Station
 * Lavender - Bugis, east of Bugis MRT Station
 * City Hall - Raffles Place, north of Raffles Place MRT Station (connects to the North South Line)
 * Outram Park - Tiong Bahru, west of Outram Park MRT Station (as turnback siding)
 * Redhill - Queenstown, east of Queenstown MRT Station
 * Clementi - Jurong East, near Ulu Pandan Depot, together with some adjoining tracks from Ulu Pandan Depot
 * Jurong East - Chinese Garden, for connection to the North South Line
 * Lakeside - Boon Lay, west of Lakeside MRT Station and east of Boon Lay MRT Station
 * Pioneer - Joo Koon, east of Joo Koon MRT Station (commonly used before 18 June 2017)
 * Joo Koon - Gul Circle, west of Joo Koon MRT Station
 * Yosemite - Tuas Plaza
 * North South Line
 * North East Line
 * Circle Line
 * Downtown Line
 * Crossrail East
 * Crossrail West