Roadway Passive Monitoring

Overview

'Roadway Passive Monitoring' monitors passing vehicles for a signature that can be used to recognize the same vehicle at different points in the network and measure travel times. Depending on the implementation and the penetration rate of the technology that is monitored, other point traffic measures may also be inferred by monitoring the number of vehicles within range over time. Today this approach is implemented most commonly using a Bluetooth receiver that passively monitors Bluetooth devices on-board passing vehicles and license plate readers that record the vehicle license plate number, but any widely deployed vehicle communications technology or feature that can be passively monitored to uniquely identify a vehicle could be used.

This functional object is included in the "ITS Roadway Equipment" physical object.

This functional object is included in the following service packages:

• TM01: Infrastructure-Based Traffic Surveillance

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

• 1.1.8: Collect Identifier Data

Requirements

Information Flows

Standards

Currently, there are no standards associated with the functional object itself though the interfaces may have standards associated with them.