Patent ID: 6218961
Filing Date: 2001-04-17
Classification: B60T,B61L,G01S

Abstract:
An on-board vehicle proximity detector comprising:(a) means for determining the geographic position of a vehicle carrying the proximity detector, said vehicle traveling along a predetermined track layout;(b) a database of track parameters of the track layout on which the vehicle is traveling;(c) means responsive to said database and said geographic position determining means for determining the track position of the vehicle;(d) means for receiving from other vehicles wireless signals including the track positions of the other vehicles;(e) means responsive to said track position determining means and said receiving means for determining the distance along said track layout between the vehicle carrying the proximity detector and each of the other vehicles from which track positions are received; and,(f) means responsive to said distance along the track determining means for initiating an alarm if the determined distance is less than a safe amount.