Study of the Effectiveness of Unmanned Radar as a Speed Control Technique inFreeway Work Zones

摘要

The goal of this research effort has been to determine the effectivenes ofunmanned radar and police presence as speed control techniques in freeway work zones in Virginia. The impacts of simulated and real police presence on traffic in work zones on Interstate 81 were assessed quantitatively using the following measures of effectiveness: change in mean speed of traffic; change in standard deviation of speed (speed variance); change in percent of traffic exceeding 65 mph; change in percent of traffic exceeding 55 mph; and change in eighty-fifty percentile speed.