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Modern European systems predominantly make use of bottom or side contact power rails. There are numerous urban rail systems, including these running mostly in tunnels, which do not use third rail at all. Such systems can be found in Asia, which may have been influenced by the overhead power supply formula followed by Tokyo Metro after 1960
On many systems, an insulating cover is provided above the third rail to protect employees working near the track; sometimes the shoe is designed to contact the side (called "side running") or bottom (called "bottom running" or "under-running") of the third rail, allowing the protective cover to be mounted directly to its top surface.
conductor rail, usually a third rail to one side of the running rails. Conductor rail can be: top contact: oldest, least safe, most affected by ice, snow, rain and leaves. Protection boards are installed on most top contact systems, which increases safety and reduces these affections.
The “third rail ” from the second operating segment of the Skyline rail system, which runs between the Aloha Stadium Station and the Middle Street Station, will be energized starting Monday ...
The following is a list of all heavy rail rapid transit systems in the United States. It does not include statistics for bus or light rail systems; see: List of United States light rail systems by ridership for light rail systems. All ridership figures represent unlinked passenger trips, so line transfers on multi-line systems register as ...
This is a list of the operating passenger rail transit systems in the United States. This list does not include intercity rail services such as the Alaska Railroad or Amtrak and its state-sponsored subsidiaries. "Region" refers to the metropolitan area based around the city listed, where applicable. Operating Region State System Authority Type (FTA) Albuquerque New Mexico Rail Runner Express ...
Innovia Metro is an automated rapid transit system manufactured by Alstom.Innovia Metro systems run on conventional metal rails and pull power from a third rail but are powered by a linear induction motor that provides traction by using magnetic force to pull on a "fourth rail" (a flat aluminum slab) placed between the running rails.
A bottom-contact third rail electrification system on the Bucharest Metro, Romania. Most electrification systems use overhead wires, but third rail is an option up to 1,500 V. Third rail systems almost exclusively use DC distribution.