Passengers on Beijing subway Line 4 will be able to watch live TV programs, like football matches and big evening entertainment shows, on the screen ins both the subway trains and the stations. A Passenger Information System (PIS) is being installed on the entire line to ensure a clear and stable signal. In the PIS net, in addition to functioning as a media player, the liquid crystal screens in the subway cars can also be used by the subway control center to monitor the inside of the cars. When emergencies happen, such as the breakdowns, stoppages or delays, the subway control center can receive pictures from any car in the train in order to be able to better handle the situation.

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Keywords: News News