Physical Object: Traffic Management Center
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:
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
# | Requirement |
---|---|
01 | The center shall monitor data on traffic and environmental conditions collected from sensors along the roadway. |
02 | Based on the measured data, the center shall calculate and set suitable speed limits by lane. |
03 | The center shall control field equipment that posts the current speed limits and displays additional information such as basic safety rules and current traffic information to drivers. |
04 | The center shall monitor the operational status of the variable speed limit equipment, including fault reports. |
05 | The center shall provide center personnel current system status and respond to control data from center personnel regarding variable speed limits. |
06 | The center shall provide the current speed limits and additional information such as basic safety rules and current traffic information to drivers. |
Information Flows
Standards
The following table lists the standards associated with the functional object itself (as opposed to standards associated with an interface).
Name | Title |
---|---|
NEMA TS 8 Cyber and Physical Security | Cyber and Physical Security for Intelligent Transportation Systems |