The Impact of Emergency Vehicle Preemption on Network Performance


Emergency vehicle preemption (EVP) breaks off normal traffic signal timing to provide a green light to coming emergency vehicles so that they can easily pass through intersections to reach emergencies safely and quickly. EVP can help reduce collisions by providing a red light to other drivers that may cross the path of the emergency vehicles. EVP allows other drivers to improve their awareness of emergency vehicles and caution them to yield the right-of-way by increasing overall safety. It also lessens the travel time for the emergency vehicle, which helps improve the chance of saving the lives of anyone seriously injured.

EVP approaches and technologies: Basic systems use zone detection. Equipment placed on the emergency vehicle sends out a noticeable infrared signal at the intersection once the vehicle enters a given range. As soon as the traffic signal receives this message, it tries to modify its signal timing to provide a green light as early as it can. Ideally, technological limitations of the infrared emitter imply that intersection EVP equipment can only register if the vehicle's signal was detected. It cannot calculate how far away an approaching vehicle is or how quickly it can reach. This can result in the green light appearing too early or too late.

More advanced EVP systems incorporate wireless radios, GPS vehicle-location equipment, and EVP requests. These transmit vehicle headings and estimated time to arrival details to the signal. This provides more dependability and advanced notice. Also, the most advanced EVP systems comprise cellular communications connecting emergency vehicles and the central traffic signal system. EVP requests are routed to any centrally-connected traffic signal across the emergency vehicle's path. EVP is vital with key routes that emergency responders use.

Strategy benefits:

It helps improve safety by lessening emergency vehicle-related collisions at intersections. Also, improving emergency vehicle travel time to the incident scene supports incident response and management.

As there can be any kind of emergency, a fully equipped emergency vehicle must be carefully prepared. Get in touch with Emtrac Systems for the best EVP systems. You can call us at (214) 607-0100, Mobile: (618) 316-4633 via Info@Emtracsystems.Com.

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