Patent ID: 7528738
Filing Date: 2009-05-05
Classification: G08G

Abstract:
1. A method of electronically advertising structural clearance information of a plurality of overpasses to an oncoming vehicle so as to determine a continued route of the vehicle, each of the overpasses having a transceiver arranged thereon, the plurality of overpasses including at least an initial overpass which is farthest of the overpasses from the vehicle and a final overpass which is closest of the overpasses to the vehicle, the method comprising: sequentially transmitting structural clearance information from the transceiver of each overpass other than the final overpass to the transceiver of a nearest respective overpass in a direction facing the oncoming vehicle, wherein the structural clearance information transmitted from the transceiver of the initial overpass includes a minimum vertical clearance beneath the initial overpass; comparing, at the transceiver of each overpass other than the initial overpass, a minimum vertical clearance beneath its corresponding overpass with a minimum vertical clearance received from the transceiver of a respective preceding overpass so as to determine a lowest minimum vertical clearance; and transmitting structural clearance information from the transceiver of the final overpass to the oncoming vehicle, wherein the structural clearance information transmitted from the transceiver of each overpass other than the initial overpass includes the lowest minimum vertical clearance determined by the corresponding transceiver, and wherein a transceiver of the oncoming vehicle receives the transmitted structural clearance information from the transceiver of the final overpass for determining whether a maximum height of the vehicle exceeds a lowest minimum vertical clearance of the plurality of overpasses to thereby determine the continued route of the vehicle.