Fargo-Moorhead Regional ITS Architecture

Roadway Speed Monitoring and Warning Functional Area

Description

'Roadway Speed Monitoring and Warning' includes the field elements that monitor vehicle speeds. If the speed is determined to be excessive, an advisory or warning is displayed. Current environmental conditions and other factors that may reduce safe operating speeds may also be taken into account. The operational status (state of the device, configuration, and fault data) is provided to the center. This application can also provide an enforcement function, reporting speed violations to an enforcement agency.

Included In

Fargo Traffic Sensors
FM Speed Warning Devices

Functional Requirements

ID	Requirement
1	The field element shall include sensors to detect vehicle speeds, under traffic or maintenance center control.
2	The field element shall include sensors to detect vehicle speeds, under enforcement agency control.
3	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.).
4	The field element shall base speed advisories to passing drivers on environmental conditions.
5	The field element shall monitor notify an enforcement agency when a speed violation is detected.
6	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.
7	The field element shall return operational status for the vehicle speed sensors to the enforcement agency.
8	The field element shall return fault data for the vehicle speed sensors to the controlling center for repair.
9	If the speed detected by vehicle speed sensors is determined to be excessive, the field element shall keep flashing until the speed reduced to or below the safe speed limit.