Field tests of Variable Speed Advisory (VSA), an Active Traffic Management strategy, were conducted under the lead of the California Department of Transportation (Caltrans) District 11. The test site is located along a 10.8-mile section on State Route 78 Eastbound which goes through the City of Vista to the city of Escondido in San Diego County, California. Data collection included raw traffic data such as occupancy, flow, and speed from loop detectors, radar speed data from VSA signs, and fused traffic state parameters from the VSA algorithm. Seven VSA signs installed on the roadside displayed VSA and traffic speed.
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