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The M764 can be configured as 4 different video detectors. Each detector is assoc <br />phase selector channels (A,B,C,D). Each detector can be configu <br />can be configured either as a preemption (high priority) or prioy (transit or low priority) output. The <br />virtual loop associated with the output can be configured to tri <br />a fixed distance from the intersection, or both. The phase selec <br />activity every second to the controller. <br />The loop will activate when a vehicle of the appropriate priorit <br />intersection and either of the conditions, ETA or distance, is m <br />latched until the call is cleared. A check out point is associated with the end of <br />map, normally the stop bar. When the vehicle reaches this point <br />outputs associated with this vehicle are cleared. <br />The diagram below shows a representation of 3 virtual loops and the check ou <br />top of a GPS approach map. <br /> <br />Intersection <br />Radio <br />SiemensM764 Phase <br />ControllerSelector <br />Ethernet <br />Long <br />ShortMedium <br />Check Out <br />Arrival <br />Intersection <br />ArrivalArrival <br />GPS Approach Map <br />Time <br />TimeTime <br /> <br />The following is a simple block diagram of the proposed system. <br /> <br /> <br />