Roadway Variable Speed Limits Functional Area


Field elements including physical overhead lane signs and associated monitoring, communications, and control electronics that are used to manage and control variable speed limits systems.

Included In

Clovis Variable Speed Limit Sign

Functional Requirements

1The field element shall monitor traffic and environmental conditions along the roadway.
2The field element shall autonomously calculate and set variable speed limits based on current conditions by lane.
3The field element shall receive commands from the controlling center that establish speed limits by lane.
4The field element shall display the current speed limits per lane to drivers.
5The field element shall display additional information such as basic safety rules and current traffic information to drivers.
6The field element shall collect operational status of the variable speed limit field equipment and report the operational status to the controlling center.
7The field element shall monitor and report faults to the controlling center.