Abstract
This report examines the interjurisdictional coordination of traffic signals along Katella Avenue, a major arterial in Orange County, California. The project involved a cooperative effort between five cities, the county, the state (Caltrans), and a regional funding agency to improve traffic flow across jurisdictional boundaries. The study documents the project from its inception to implementation, highlighting financial, administrative, and political challenges and successes. It also considers traffic control hardware and software, and the impact of coordinated timing plans on traffic efficiency along the 40-intersection corridor.
