In Denver, Colorado emergency vehicle signal preemption reduced response time by 14 to 23 percent.
Date Posted

Time Study of the Effectiveness of the Opticom Traffic Control System (Year 1978)

Summary Information

This study evaluated changes in emergency vehicle response times as a result of signal preemption in the City of Denver between 1977 and 1978. The study conducted over a 90 day period included three fire stations and 75 signalized intersections. Firefighters recorded travel times necessary to traverse typical routes before and after installation of signal preemption.

The collected data showed emergency vehicle response times decreased by 14 to 23 percent and saved approximately 70 seconds per response on a typical route with 3 to 6 signalized intersections.

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