How does SafetyZone work?
When an officer makes a traffic stop, he can press a button to activate SafetyZone. Ranger then activates its rear antenna and alerts the officer to the presence of any vehicle traveling faster than a pre-determined speed, within a user-determined distance of the patrol vehicle.* (The officer can set the speed and distance to match his patrol situation.)
This alert is sounded in the cabin and broadcast to the officer outside of the vehicle. The external alert can use the vehicles horn or a dedicated siren and/or light.
SafetyZone can give the officer the opportunity to move to safety and avoid dangerous vehicles. SafetyZone can save lives. See the chart below for examples of how much warning SafetyZone can give you:
|Vehicle Speed||Vehicle Distance in Yards|
|100 Yds||200 Yds||300 Yds||400 Yds|
|50MPH||4.1 sec||8.2 sec||12.3 sec||16.4 sec|
|60MPH||3.4 sec||6.8 sec||10.2 sec||13.6 sec|
|70MPH||2.9 sec||5.8 sec||8.7 sec||11.6 sec|
|80MPH||2.6 sec||5.2 sec||7.8 sec||10.4 sec|
|90MPH||2.3 sec||4.6 sec||6.9 sec||9.2 sec|
Why hasn’t anything like SafetyZone been offered before now?
Distance-measuring is crucial to making SafetyZone reliable. Before Ranger, no one had developed a ranging radar for law enforcement use.
Traditional radars can only distinguish vehicles by speed or signal strength. Signal strength is a factor of both distance and the size of the vehicle, with larger vehicles giving a much larger signal strength.
In order to alert the officer to small cars close to him, a traditional radar would also overreact by alerting him to large trucks that could be over 3/4 mi. away. Officers would soon lose confidence in the alert if it gave many false alarms.
Ranger’s distance information minimized the number of false alarms of the system by filtering out the signals from large vehicles that are far from the patrol vehicle, and focusing on the speeders who are close to the patrol vehicle and are real threats to the officer’s safety.
* SafetyZone serves as a supplement to an officer’s personal safety. While it improves the ability of the officer to safely monitor traffic during stops, it does not fully replace the need to remain alert to the surrounding traffic.