Red light cameras have been highly successful in reducing the number and severity of crashes at intersections; however, they cannot prevent T-bone collisions caused by a driver running a red light. To prevent these accidents, Redflex has developed an intelligent crash avoidance system.
Redflex’s Hold the Red solution extends the ‘all-red’ phase at an intersection to hold cross traffic vehicles should a driver be detected attempting to run the red light. This provides time for the offending driver to safely clear the intersection. Law-abiding drivers in cross traffic lanes are held back, reducing the chance they will enter into a potentially hazardous situation, thereby saving lives and reducing congestion. The breaching driver is captured by the camera and will receive a violation.
The advanced algorithm behind Redflex’s Hold the Red can detect a vehicle from at least 45 metres from the intersection, and determine its speed and whether it is accelerating or slowing down as it approaches. It can also determine the point at which a vehicle cannot – or is extremely unlikely to stop – and the likelihood of it breaching the red light signal.
The detection of a driver about to run a red light is linked to the traffic light control system and the all-red phase is extended, preventing a green light being given to cross traffic vehicles. An ‘all-red’ phase may last from one to a few seconds, with one second being the typical duration. Extension of the phase will be more than compensated for by the prevention of accidents – whether large or small – thus helping maintain traffic flow.