TRUVELO
Truvelo
What are they? A forward-facing speed camera.
Where will I see them? Everywhere except motorways
Who owns it? The local safety camera partnership.
How do they work? These cameras, also in yellow housings, use sensors embedded in the road to measure the speed of oncoming vehicles and photographs the front of vehicles using 35mm colour film (though it is also capable of photographing the rear). The system works out how fast the vehicle is travelling according to the information received from the loops in the ground. The vehicle speed is calculated the moment the front axle crosses the last loop but a photograph is only taken when the camera expects the vehicle to reach three marker lines 1.8m beyond this point. The time taken to travel the 1.8m is recorded in milliseconds on the negative alongside the speed. An operator also checks the photograph manually to ensure the vehicle has reached the marker lines as expected by the camera.
Will I be fined? YES