Patent ID: 8742946
Filing Date: 2014-06-03
Classification: G08G

Abstract:
1. A traffic preemption system comprising: an intersection control module; an intersection preemption unit comprising a signal detector configured to receive a signal transmitted by a vehicle preemption unit mounted to a vehicle; a remotely located electronic device to provide a confirmation output of receipt by said intersection preemption unit of said signal transmitted by said vehicle preemption unit, comprising a controller configured to detect a variation in voltage; and a cable coupling the intersection control module, the intersection preemption unit, and the remotely located electronic device, the cable comprising: a power wire configured to carry a modulated voltage level to provide said variation in voltage, and share power among the intersection preemption unit and the remotely located electronic device; a ground wire; and a communications wire configured to transmit a communications signal between the intersection preemption unit and the intersection control module to control traffic light signals according to a preemptive traffic light control procedure responsive to receipt by said intersection preemption unit of said signal transmitted by said vehicle preemption unit.