Emergency vehicle command and control system for traffic signal

Details Emergency vehicle command and control system for traffic signal Emergency vehicle command and control system for traffic signal

1997-01-16

1999-09-21

Crosland, Donnie L.

Communications: electrical

Override of traffic control indicator by command transmitter

340902, 455 675, 455 321, G08G 107

Patent

active

059559683

ABSTRACT:
The present invention provides an emergency vehicle command and control system for preemption of intersection traffic signals. Specifically, the system employs coded microwave transmissions from the emergency vehicle which are received by a scanned antenna array at the intersection and are processed to determine the direction-of-arrival of the signal. Each coded transmission received at the intersection is demodulated and error checked for validity. Valid transmissions are communicated to an intersection controller to preempt traffic signals. The system is also equipped to handle multiple vehicle arrivals and to transmit a coded signal to adjacent or orthogonal intersections to execute around-the-corner preemption control. Additionally, all preemption events may be stored in a memory for later retrieval and analysis.

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patent: 5539398 (1996-07-01), Hall et al.
patent: 5602739 (1997-02-01), Haagenstad et al.

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