TMC Variable Speed Limits

Overview

'TMC Variable Speed Limits' provides center monitoring and control of variable speed limits systems. It monitors data on traffic and environmental conditions collected from sensors along the roadway. Based on the measured data, it calculates and sets suitable speed limits usually by lane. It controls equipment that posts the current speed limits and displays additional information such as basic safety rules and current traffic information to drivers.

This functional object is included in the "Traffic Management Center" physical object.

This functional object is included in the following service packages:

• TM20: Variable Speed Limits
• TM21: Speed Harmonization
• WX03: Spot Weather Impact Warning

This functional object is mapped to the following Functional View PSpecs:

• 1.1.2.5: Process Vehicle Situation Data
• 1.1.2.8: Process Roadway Environmental Data
• 1.2.4.3: Output In-vehicle Signage Data
• 1.2.8: Collect Traffic Field Equipment Fault Data
• 1.3.1.1: Analyze Traffic Data for Incidents
• 1.3.2.5: Provide Current Incidents Store Interface
• 1.3.2.6: Manage Traffic Routing
• 9.3.3.3: Manage Vehicle Speed on Roadway

Requirements

Information Flows

Standards

The following table lists the standards associated with the functional object itself (as opposed to standards associated with an interface).