| 摘要 |
A device 1 for indicating an expected time to arrival of a vehicle serving on a line in a public transport system at a stop along said line comprises an indication 8 of at least said line in the public transport system. The device has light-emitting unit 2 and a control unit 3 adapted to receive a signal 4 corresponding to the expected remaining time to arrival of the vehicle at the stop, and to cause the light-emitting unit 2, as a function of said signal, to emit a light signal in the vicinity of said indication,, which signal varies at a frequency that is dependent on said time. A comparatively lower frequency represents a longer time to arrival and a comparatively higher frequency represents a shorter time to arrival. The analogue character of the information facilitates an accurate perception and understanding of the information, which is particularly important when the remaining time to arrival is short. |
