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Functional Requirements: Roadway Speed Monitoring and Warning |
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| Description: |
This equipment package includes the field elements that monitor vehicle speeds. If the speed is determined to be excessive, then roadside equipment can suggest a safe driving speed. Environmental conditions may be monitored and factored into the safe speed advisories that are provided to the motorist. The characteristics of individual vehicles may also be monitored and used to warn vehicles with specific limitations that reduce safe operating speeds, e.g., rollover risk for tall vehicles. The operational status (state of the device, configuration, and fault data) is provided to the center. This equipment package can also provide an enforcement function, reporting speed violations to an enforcement agency. |
| Functional Requirements: |
- 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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| Included In: |
Municipal Speed Monitoring Equipment
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