The Texas Traffic Light Synchronization program reduced delays by 24.6 percent by updating traffic signal control equipment and optimizing signal timing.

Texas Traffic Light Synchronization Program

7-10 August 2005
Statewide; Texas; United States

Summary Information

Optimizing traffic signal timing is considered a low-cost, high-benefit approach to reducing congestion. Signal timing strategies include the minimization of stops, delays, fuel consumption and air pollution emissions and the maximization of the traffic progression through the system.

The article, "The Benefits of Retiming Traffic Signals",1 presented in the ITE Journal is an interim product of the ITE Traffic Engineering Council's project TENC-101-02. This article describes the who, what, when, why, and how of traffic signal retiming. The presentation "Benefits of Retiming Traffic Signals: A Reference for Practitioners and Decision Makers About the Benefits of Traffic Signal Retiming" was presented at the 2005 Annual ITE meeting and provides similar information.

Signal retiming provides significant direct benefits for the traveling public. One of these benefits is the reduced delay experienced by motorists. Delay savings are more apparent for motorists traveling along coordinated signalized arterials. Improved signal timing also has indirect benefits. Better coordination along major arterials minimizes the diversion of traffic to local and residential streets, improving safety and traffic conditions. It also leads to reduced fuel consumption, reduced emissions, and improved air quality.

1 Sunkari, Srinivasa, P.E., The Benefits of Retiming Traffic Signals, ITE Journal, April, 2004.


A synthesis of various traffic signal retiming projects across the U.S. and Canada revealed that delays can decrease by 13 to 94 percent.
  • The Traffic Light Synchronization Program in Texas reduced delay by 24.6 percent.

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Benefits of Retiming Traffic Signals: A Reference for Practitioners and Decision Makers About the Benefits of Traffic Signal Retiming (Presentation)

Author: Harris, J.

Published By: Presentation at ITE 2005 Annual Meeting and Exhibit

Source Date: 7-10 August 2005


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Goal Areas


Related Metropolitan Integration Links

Link 26: Arterial Management intra-component

Typical Deployment Locations

Metropolitan Areas, Statewide


coordinated signals, signal coordination, centralized signal control, signal synchronization, traffic signals, advanced signal control, signal timing optimization, coordinated signal control, advanced signal controller, traffic signal retiming, retiming

Benefit ID: 2008-00506