The drive-over bridge has a bridge plate on the rear end, turning on a perpendicular transverse axis, with one or more tongues (10) on the free end, able to be pressed in against a return force. The tongue can be diverted downwards and backwards, so that it lies back against a circular track. The tongue may be bent in a curve. There are two rollers (11,12) to guide the tongue. The front one (11) is below the tongue and the rear one is above it. There is a power spring between the rear end of the tongue and the bridge plate to provide the return force.
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