Patent ID: 8339280
Filing Date: 2012-12-25
Classification: G08G

Abstract:
1. A traffic preemption system comprising: a vehicle preemption unit configured to mount to a vehicle, the vehicle preemption unit comprising an optical transmitter; an intersection preemption unit coupled to an intersection system controller, the intersection preemption unit configured to receive an identification of a presence of a vehicle from the optical transmitter and a signal indicating a status of the vehicle and change a traffic light in favor of the vehicle to which the vehicle preemption unit is mounted in response to the signal indicating the status of the vehicle received from the vehicle preemption unit; a vehicle radio transceiver configured to communicate with the intersection preemption unit; and a vehicle controller coupled to the optical transmitter and the vehicle radio receiver, the vehicle controller configured to generate a vehicle identifying characteristic unique to the vehicle, the vehicle identifying characteristic having a time delay unique to the vehicle, the time delay included in the signal received from the vehicle preemption unit.