Cameras have two distinct functions - one being to demonstrate to all road users that they are near to a collision hotspot and the other is to ensure the speed limit is adhered to.

Red light safety cameras
The objective of a red light safety camera at a signal-controlled junction is to reduce the number of collisions caused by drivers’ non-compliance with a red signal.

A red light safety camera will only activate when the red light is illuminated.

The red light safety cameras are linked to two induction loops set in the road, one just before the stop line and the second one a short distance past the stop line. When a vehicle moves over the first loop, the sequence is initiated, if the vehicle continues to cross the second loop (past the stop line) the camera will take a photo, followed by a second photo a second or two later. The photos will record the date, time and speed of the vehicle. It also records the amount of time elapsed since the red light was illuminated and lane identification can also be recorded on the film.

Speed on green safety cameras

Speed on Green safety cameras are positioned at traffic light junctions. As well as monitoring and enforcing non compliance with a red signal, they will also record speeding offences when vehicles travel in excess of the speed limit passing through the traffic lights.