Intermittent automatic train control

The “intermittent automatic train running control” is the default automatic train control in rail traffic.  This saves us from collisions even when the engineer disregards a halt signal. It’s initiated by on board brake supervision. This, also referred as braking graphs, ensures that the traveling velocity is always less than the allowed velocity.

In this chapter you will learn all about the most important coherences. In the case of the widespread construction type „PZB 90“, a train passes a trackside radio beacon. If this radio beacon is activated, the train-born supervision for deceleration is enabled. This means the engineer must maintain a traveling velocity below the allowed supervised velocity. If this is not the case, the onboard computer starts a forced brake procedure. The radio beacon is only active, when the following track part is not assigned.        

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