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Why would it be an issue if you opened more doors than necessary? I'm assuming that the edge of the platform will always match the edge of a car, and that it i

• manicdee 12y ago
  Some trains will have 8 cars but stop at some stations with only 4 cars worth of platform. The passengers heading to those station usually knowmto board the first four cars. The difficulty arises when doors are accidentally opened for all cars at 4-car platforms. No, the train does not move forwards by 4 cars, it simply stops, passengers board and alight from the front four (including a rush of passengers frommthe back four cars who forgot that their station is a four-car stop), then the train leaves.