Current practice and comparison research on nationwide deployed Adaptive Signal Control Technology shows up to 26 percent reduction in travel time.

Comparing operational benefits of adaptive signal control technology.

Nationwide,United States

Summary Information

Research students at the University of Connecticut investigated the current state of practice of various operating Adaptive Signal Control Technology (ASCT) systems throughout the United States. The systems analyzed included SCATS, ACS-Lite, and InSync. Working principals, operational characteristics, benefits, and deployment and maintenance costs were all reviewed through a set of surveys and available literature.


The report cites another source that compares the operational benefits of ACS-Lite, InSync, and SCATS. 12 studies (4 for each system) were compared. Of the benefits reported, the most common measures of effectiveness were travel time, number of vehicle stops, traffic speed, and fuel consumption. Their findings showed that InSync resulted in greater benefits than ACS-Lite and SCATS in terms of travel time, vehicle stops, and delay reduction, as shown in the figures below:

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Adaptive Signal Control Technology: Current Practice and Comparison

Author: Emin Basic, Yasser De Jesus, Ashrafur Rahman

Published By: Intelligent Transportation Society of Connecticut (ITS- CT)

Source Date: 04/01/2012



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Goal Areas


Typical Deployment Locations

Metropolitan Areas


traffic signals, adaptive signals

Benefit ID: 2015-00996