Adaptive traffic signal control uses real-time traffic information from road sensors to determine when a traffic light should be red or green. When effective, adaptive traffic signal controls can reduce congestion and thus improve traffic flow. The effectiveness of adaptive control depends on the control logic employed and the particular network characteristics. In this project, researchers field-tested the added value of implementing adaptive traffic signal control on the Pacific Coast Highway in Santa Monica, California. Alternative strategies—including widely used fixed time signal plans—were developed and tested to determine the most effective and cost efficient solution. Implementation guidelines for a statewide rollout are now being developed based on the results of the field-testing.