Emergency Vehicle Preemption
EV Preemption, as it pertains to traffic and smart signals, is the process used to increase the overall efficiency and response times of emergency vehicles. This technology has also been utilized in the coordination of transit, trains and other commercial vehicles.
What are the benefits of EV Preemption?
According to a study provided by the Federal Highway Administration; report number FWHA-SA-07-015 the following benefits were observed across three separate cities.
Reduced response times
By reducing the the probability of emergency vehicles encountering a red light during a response enables a savings of 30-45 seconds per intersection. This time saving can be critical when when compared to the survival rate of persons affected by cardiac arrest. With every minute that emergency arrive early the chances of survival are increased by 7-10%. After 8 minutes, there is little chance of survival. With such a narrow margin, EVP can be the difference between life or death. A green light prior to the arrival of an emergency vehicle allow queued traffic to disperse resulting in higher average speeds for response teams.
Reduced number of crashes
The sudden approach of an emergency vehicle can sometimes elicit a panic response from motorists within intersections attempting to maneuver out of the way. These reactions can result in conflicts or congestion. Through the use of Preemption, one city was able to reduce the number of vehicle crashes from 2.3 per year to less than one intersection crash every five years.
Fewer Fire/EMS Stations
Due to the reduction in delay one can achieve the same response times with fewer stations resulting in a substantial cost savings to the community.
Increased insurance rating
One city in the above mentioned study was able to maintain a response time rate of over 90%. This granted the highest possible insurance rating on a scale of one to ten.
Reduced transit delays
The Transit Signal Priority; Planning and Implementation Handbook identifies a 40% reduction in transit delays and a fuel cost savings of up to 19%
Types of Preemption
Can-traffic Services is familiar and trained in the installation, use and maintenance of all traffic Preemption devices. These include;
-Light based
-Infrared based
-Sound based and,
-Radio based emitter/detector systems.
The Federal Highway Administration also recognizes the importance of having ONE agency responsible for system maintenance. Effective reporting and repair ensures the system operates at maximum efficiency. Can-traffic currently services and maintenance hundreds of Preemption devices across the west. Put our knowledge and experience to work for you and contact us today!
