Roadway Signal Preemption Functional Area


'Roadway Signal Preemption' includes the field elements that receive signal preemption requests from emergency vehicles approaching a signalized intersection and overrides the current operation of the traffic signals to stop conflicting traffic and grant right–of–way to the approaching vehicle.

Included In

City of Arlington Roadway Devices
City of Dallas Roadway Devices
City of Plano Roadway Devices
Local Roadway Devices
DFW International Airport Roadway Devices

Functional Requirements

1The field element shall respond to signal preemption requests from emergency vehicles.
2The field element shall inform the controlling center when preemption requests have been received.
3The field element shall send the preemption request to the signal controller to immediately preempt the signal for the requested direction.