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Arterial Signal Coordination Performance Evaluation Using Automated Vehicle Trajectories

June 13 @ 1:00 pm - 3:00 pm

Arterial signal coordination is the process of adjusting the timing of traffic signals along an arterial road so that vehicles can travel through the corridor with minimal stops. This can improve traffic flow, reduce delays, and improve safety.

There are a number of different ways to evaluate arterial signal coordination. The two commonly used methods are (1) to use vehicle trajectories through either manual floating-car runs or vehicle telematics, and (2) to use automated traffic signal performance measures (ATPSMs). ATPSMs are a set of metrics that can be used to evaluate the performance of traffic signal systems. One of the most important aspects of signal performance is coordination, and the percentage of vehicles that arrive at a signal on red (%AoR) is one of the major parameters. %AoR is a good measure of signal coordination at a single intersection, but it does not provide a complete picture of corridor-level performance. Another graphical representation of the %AoR is the Purdue Coordination Diagram. It provides a visual illustration of the quality of progression on individual intersection approaches.

In this presentation, we will show how automated trajectories from vehicle telematics can be used to improve the evaluation of signal coordination. We will use a real-world case study to show how %AoR and trajectory-based stops are correlated, but not always consistent. We will also introduce the concept of the Corridor Synchronization Performance Index (CSPI), which is a corridor-level metric that can be used to evaluate signal coordination.

The course is intended for transportation professionals who are involved in the planning, design, operation, or maintenance of traffic signal systems. This includes engineers, planners, traffic operations staff, and consultants.

🚩This course offers 2 PDH’s for fully viewing the webinar.
🚩Please note – Florida local agencies are being given first priority!

For more information, click here.



June 13
1:00 pm - 3:00 pm
Event Category:


The Florida LTAP Center
(813) 974-4450
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