Patent ID: 7116248

Claim:
A synchronous vehicle detector system comprising; at least two vehicle detectors each having at least one vehicle loop to which that detector can be coupled for vehicle sampling purposes, one of said vehicle detectors comprising a master vehicle detector and the remaining ones of said at least two vehicle detectors comprising slave vehicle detectors; and means for synchronizing the operation of said at least two vehicle detectors so that said master vehicle detector can control the commencement of vehicle sampling of said slave vehicle detectors, said synchronizing means including a synch input and a synch output for each of said at least two vehicle detectors, the synch output of said master vehicle detector being coupled to the synch input of said slave vehicle detectors, the synch output of said slave vehicle detectors being coupled to the synch input of said master vehicle detector, said slave vehicle detectors being responsive to the receipt of a synch input signal at said synch input thereof to enable vehicle sampling by said slave vehicle detectors, said master vehicle detector being responsive to the receipt of a synch input signal from at least one of said slave vehicle detectors to enable vehicle sampling by said master vehicle detector.