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Automatic train stop or ATS is a system on a train that automatically stops a train if certain situations occur (unresponsive train operator, earthquake, disconnected rail, train running over a stop signal, etc.) to prevent accidents.
A signal with associated trip arm in the raised position (circled) Part of a railway signalling system, a train stop, trip stop or tripcock (sometimes called a tripper) is a train protection device that automatically stops a train if it attempts to pass a signal when the signal aspect and operating rules prohibit such movement, or (in some applications) if it attempts to pass at an excessive ...
He is known for his design of the earliest predecessor to the New York City Subway, the Beach Pneumatic Transit, which became the first subway in America. [1] He was an early owner and cofounder of Scientific American and Munn & Co., the country's leading patent agency, and helped secure patents for Thomas Edison , Alexander Graham Bell ...
The New York City Subway system differs from other railroad chaining systems in that it uses the engineer's chain of 100 feet (30.48 m) rather than the surveyor's chain of 66 feet (20.12 m). Chaining is used in the New York City Subway system in conjunction with train radios, in order to ascertain a train's location on a given line. [33]
The Tomlinson coupler is the most widely used fully automatic heavy rail coupling in North America having been adopted by the Washington Metro, Massachusetts Bay Transportation Authority, PATCO Speedline, SEPTA Broad Street Subway, Los Angeles Metro Rail, Baltimore Metro, Miami Metro, MARTA Rail and the New York City Subway for its R44/R46 ...
The train may be able to detect the status of (and sometimes control) wayside devices, for example switch positions. This information is sent to the control center to further define the train's safe movements. Text messages and alarm conditions may also be automatically and manually exchanged between the train and the control center.
The Beijing Subway is the world's longest metro network at 815.2 kilometres (507 mi) and the Shanghai Metro has the highest annual ridership at 2.83 billion trips. [3] The New York City Subway has the greatest number of stations.
[231] [233] Future subway cars, like the R211, will also include Wi-Fi upon their delivery. [125] [234] [235] In 2017, the MTA partnered with NYC Public Libraries, New York State, and Transit Wireless, to create Subway Library, a system that allows users to choose from a selection of e-books to read for free when connected to TransitWireless Wi-Fi.