What happens when two or more vehicles approach the same intersection in a convoy?
Since the receiver will lock on the strongest signal, the lead vehicle will most likely initiate the preemption. When it arrives at the intersection, the receiver will end the preemption. However, if the traffic signal controller is programmed with a 3 6 second delay before returning the lights to normal operation, the following vehicle will be able to initiate a new preemption before the previous one expires. Thus the preemption will remain in effect until the last vehicle has cleared the intersection.
