What is the app that tells you where the cops are?

When the radio waves from the officer’s radar gun strike a vehicle, some of the signals are reflected and bounced back towards the gun. The radar gun analyzes any changes in the signal’s frequency to calculate a speed and then displays the speed to the officer.

Always know what’s happening on the road with Waze . Even if you know the way, Waze tells you instantly about traffic, construction, police, crashes, & more. If traffic is bad on your route, Waze will change it to save you time. Why Waze?

The Law. In the UK, both fixed and mobile radar and laser speed camera detection devices are legal , although this is the subject of an ongoing debate in Parliament. However they are not legal in most countries in Europe and using a device may result in fines and/or seizure of the device.