Metro station

A metro station or subway station is a railway station for a rapid transit system, which as a whole is usually called a Metro or Subway. The station provides a means for passengers to purchase tickets, access trains stopping at its platforms and evacuate the system in the case of an emergency.

The location of a metro station is carefully planned to provide easy access to important urban facilities such as roads, commercial centers, major buildings and other transport nodes.

Most stations are located underground, with entrances/exits leading up to ground or street level. The bulk of the station typically positioned under land reserved for public thoroughfares or parks. Placing the station underground reduces the outside area occupied by the station, allowing vehicles and pedestrians to continue using the ground-level area in a similar way as before the station's construction. This is especially important where the station is serving high-density urban precincts, where ground-level spaces are already heavily utilised.

In other cases, a station may be elevated above a road, or at ground level depending on the level of the train tracks. The physical, visual and economic impact of the station and its operations will be greater. Planners will often take metro lines or parts of lines at or above ground where urban density decreases, extending the system further for less cost. Alternatively, a preexisting railway land corridor is re-purposed for rapid transit.

At street level the logo of the metro company marks the entrances/exits of the station. Usually, signage shows the name of the station and describes the facilities of the station and the system it serves. Often there are several entrances for one station, saving pedestrians from needing to cross a street and reducing crowding.

...
Wikipedia