The S-Bahn is a hybrid urban-suburban rail system serving a metropolitan region predominantly in German-speaking countries. Some of the larger S-Bahn systems provide service similar to rapid transit systems, while smaller ones often resemble commuter or even regional rail systems. The name S-Bahn derives from Schnellbahn, Stadtbahn or Stadtschnellbahn.
Part of Berlin Stadtbahn. The tracks on the right belong to the S-Bahn network and the trains stop at the Hackescher Markt station, while the other two tracks are for other train types, which do not stop at this station.
Vesterport S-train station has three entrances. This is the main one.
Vesterport station is located below street level, but is not under ground. Other trains do not stop here, solely S-trains. Compare with picture of Berlin's S-Bahn above. Same concept.
Svanemøllen Station, main entrance
Commuter rail, or suburban rail, is a passenger rail transport service that primarily operates within a metropolitan area, connecting commuters to a central city from adjacent suburbs or commuter towns. Commuter rail systems are considered heavy rail, using electric or diesel trains. Distance charges or zone pricing may be used.
Mumbai Suburban Railway carries more than 7.24 million commuters on a daily basis
Very short commuter train in push mode.
GO Transit serves the Greater Golden Horseshoe region surrounding Toronto. Its train services are transitioning from a peak direction commuter railway to a Regional Express Network.
A Sydney Trains B set with an upper and lower deck