EMERGENCY VEHICLE SIGNAL PREEMPTION TRACEABILITY MATRIX SOURCE FUNCTIONAL SOURCE CORRECTIVE DOCUMENT TEST PASS/FAIL REQUIREMENT DOCUMENT ACTION REFERENCE 1. Vehicle based emitter is Signal reception verified in activated by emergency controller and by detectors. personnel in the vehicle 2. Detectors mounted on the Signal reception verified in signal mast arms are controller and by detectors. This is responsive done for each approach of the intersection. 3. The traffic signal controller Signal reception verified in shall terminate any conflicting controller and by detectors. This is phases to bring up the through done for each approach of the phase for the authorized intersection. Visually verify that emergency vehicle signal phasing has been preempted. Visual inspection 4. Indicator lights shall be mounted on signal mast arms (one for each direction) Visually verify confirmation light 5. Indicator lights shall indicate operation in the field. This is done that preemption is in operation for each approach of the a. The indicator light shall be intersection. The lights should be wired through the controller to steady for the preempted confirm true preemption; not approach and the opposing through phase selector. approach during preemption activation b. The indicator light shall flash for the conflicting approaches during preemption activation c. The indicator light shall remain dark when the preemption system is not active
EMERGENCY VEHICLE SIGNAL PREEMPTION TRACEABILITY MATRIX FUNCTIONAL REQUIREMENT SOURCE DOCUMENT SOURCE DOCUMENT REFERENCE TEST PASS/FAIL CORRECTIVE ACTION 1. Vehicle based emitter is activated by emergency personnel in the vehicle Signal reception verified in controller and by detectors. 2. Detectors mounted on the signal mast arms are responsive Signal reception verified in controller and by detectors. This is done for each approach of the intersection. 3. The traffic signal controller shall terminate any conflicting phases to bring up the through phase for the authorized emergency vehicle Signal reception verified in controller and by detectors. This is done for each approach of the intersection. Visually verify that signal phasing has been preempted. 4. Indicator lights shall be mounted on signal mast arms (one for each direction) Visual inspection 5. Indicator lights shall indicate that preemption is in operation a. The indicator light shall be steady for the preempted approach and the opposing approach during preemption activation b. The indicator light shall flash for the conflicting approaches during preemption activation c. The indicator light shall remain dark when the preemption system is not active Visually verify confirmation light operation in the field. This is done for each approach of the intersection. The lights should be wired through the controller to confirm true preemption; not through phase selector.
1396-2%20EVP.docx