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Frequently Asked Questions

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Gatso cameras are the most commonly used speed cameras on UK roads. They use radar technology to measure how fast a vehicle is travelling. If a vehicle is exceeding the speed limit for a given road, a camera and high powered flash take two photographs of the rear as it passes. The cameras only take rear facing photographs so the high powered flash doesn't blind drivers.

The Truvelo camera is usually forward facing (it can be rear facing) and uses four piezo sensors embedded in the road surface at set distances to measure the speed of passing vehicles.

SPECS cameras record a vehicle's average speed over a given distance. They are often used on motorways/dual carriageways or road works.

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Answers in this FAQ section are provided by the 'Ask the Police' website. Produced by the Police National Legal Database (PNLD) team, 'Ask the Police' is an official police site approved by the National Police Chiefs Council (NPCC). All FAQ answers are © PNLD.