Physical Object: ITS Roadway Equipment
Roadway Signal Preemption
Overview
'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.
This functional object is included in the "ITS Roadway Equipment" physical object.
This functional object is included in the following service packages:
This functional object is mapped to the following Functional View PSpecs:
Requirements
| # | Requirement |
|---|---|
| 01 | The field element shall respond to signal preemption requests from emergency vehicles. |
| 02 | The field element shall inform the controlling center when preemption requests have been received. |
| 03 | The field element shall send the preemption request to the signal controller to immediately preempt the signal for the requested direction. |
Information Flows
Standards
The following table lists the standards associated with the functional object itself (as opposed to standards associated with an interface).
| Name | Title |
|---|---|
| ITE ATC | Advanced Transportation Controller |
| ITE ATC API | Application Programming Interface Standard for the Advanced Transportation Controller |
| ITE ATC Model 2070 | Model 2070 Controller Standard |
| NEMA TS2 Traffic Controller Assemblies | Traffic Controller Assemblies with NTCIP Requirements |