| Functional Requirements: |
Roadway Equipment Coordination
- The field element shall include sensors (such as traffic, environmental, and work zone intrusion detection sensors) that provide data and status information to other field element devices (such as dynamic message signs, ramp meters, traffic signals, work zone intrusion alert systems), without center control.
- The field element shall include sensors (such as traffic, environmental, and work zone intrusion detection sensors) that receive control information from other field element devices, without center control.
- The field element shall include devices (such as arterial or freeway controllers, roadway automated treatment systems, barrier and safeguard systems, emissions or pollution systems, and work zone intrusion alert systems) that provide data and status information to other field element devices (such as dynamic message signs, traffic controllers on adjacent intersections), without center control.
- The field element shall include devices (such as arterial or freeway controllers, roadway automated treatment systems, barrier and safeguard systems, emissions or pollution systems, and work zone intrusion alert systems) that receive control information from other field element devices, without center control.
Roadway Speed Monitoring
- The field element shall include sensors to detect vehicle speeds, under traffic or maintenance center control.
- The field element shall include sensors to detect vehicle speeds, under enforcement agency control.
- If the speed detected by vehicle speed sensors is determined to be excessive, the field element shall provide a safe speed advisory to passing drivers via a driver information system (such as portable messages signs, field to vehicle communications to in-vehicle signing systems, etc.).
- The field element shall base speed advisories to passing drivers on environmental conditions.
- The field element shall monitor notify an enforcement agency when a speed violation is detected.
- The field element shall return operational status for the vehicle speed sensors to the controlling traffic or maintenance center; including measured speeds, warning messages displayed, and violation records.
- The field element shall return operational status for the vehicle speed sensors to the enforcement agency.
- The field element shall return fault data for the vehicle speed sensors to the controlling center for repair.
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