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The current Dutch railway signalling system operated by ProRail has been in effect since 1954 on the Dutch Railways network
It was designed to be one of the simplest in Europe and is integrated to the ATB, the system of cab signalling widespread on the Dutch network.
Dutch trains normally use the right-hand track and the signals are placed at the right of the track; in sections also equipped to run on the left track, the signals are placed on the left.
Below are common forms:
Their aspects are categorized according to the colour. (There is never more than one colour at a time):
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 | Reference speed of the line (10x the displayed digit in km/h) allows the speed increase to the indicated value (if absent: 125 km/h) when the rear of the train has passed the display. |
 | Speed restriction announcement: reduce speed to the indicated value (10x the displayed digit in km/h) before the speed restriction sign. |
 | Speed restriction (10x the displayed digit in km/h) when the front of the train has passed the display. It indicates both the start of the speed restricted zone (indicated by the yellow triangle on edge) or the permission to accelerate to a speed lower than the reference speed of the line (in that case, after the rear of the train has passed the sign). |
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