Patent ID: 7018128
Filing Date: 2006-03-28
Classification: E01C

Abstract:
1. An apparatus for slowing the progress of a vehicle which has departed a track with a component of velocity transverse to the direction of the track, said apparatus comprising: a pool of liquid beside the track; said pool extending in the direction of the track and extending transversely to the direction of the track; said pool comprising a shaped base; said liquid being contained from draining within said base; said base being shaped for said liquid to progressively increase in depth with increasing transverse distance from the track for at least an initial portion of the distance from the track to provide a smooth transition for a vehicle from the track into the pool and from the pool back onto the track; and the extent of said pool being sufficient in said direction and the extent of said pool being sufficient in the direction transverse to the direction of the track to slow a vehicle within said pool when a vehicle engages said liquid.