Different safety cameras are used on South Australian roads.
Depending on the camera system it may:
Traffic lights operate on a three phase system.
Warning times for the yellow light are set at:
A 10% tolerance for traffic light timings is allowed by the Austroads Guide. The tolerance is applied and an expiation notice may be issued if the reading is below the prescribed time.
See parts six, nine and 10 of the Austroads Guide to Traffic Management to find out how traffic lights work.
View the Guide to Traffic Management on the Austroads' website.
Find out more about the road rules for traffic lights on the mylicence website.
Three types of fixed cameras are used in South Australia:
Fixed cameras are connected to induction loop sensors located:
The camera is triggered when the sensors detect vehicles:
Safety cameras do not trigger on a green or yellow light when drivers enter the intersection.
Sometimes the camera flashes when a driver passes through the intersection on a green or yellow light. This could be because a driver in another lane, behind or turning right has triggered the camera.
When the fixed safety camera is triggered two photographs are taken, usually of the rear of the vehicle.
The photos are taken a minimum of half a second apart and show for
Photo 1 that the light has turned red at the point of crossing the stop line
Photo 2 the vehicle further through the intersection while the light is still red.
Photo 1 the vehicle travelling over the induction loop
Photo 2 the vehicle's progression after leaving the induction loop.
Vehicles waiting in the intersection while the light changes from yellow to red are not photographed.
Find out more about how fixed safety cameras work: Fixed Safety Camera Operation Practices
Mobile safety cameras are set up on the side of the road and are either mounted in a vehicle or on a tripod.
These safety cameras use radar to detect speeding vehicles.
Safe-T-Cam is a network of cameras placed on major arterial roads that detect unregistered vehicles.
In South Australia Safe-T-Cam is managed by the Department of Planning, Transport and Infrastructure (DPTI).
Find out more about Safe-T-Cam on DPTI's On Road website.
Safety camera photos are checked and verified by trained staff in the South Australia Police (SAPOL) Expiation Notice Branch. Vehicle registration is checked at the same time.
An expiation notice is not issued until the checks have been completed. Notices can be issued for:
Technical repair of all safety cameras is carried out in accredited National Association of Testing Authorities (NATA) workshops and laboratories or by the camera manufacturer.
Speed and red light safety cameras undergo rigorous certification, testing and maintenance.
The cameras are tested regularly to ensure that the:
Technical repairs are carried out in NATA accredited workshops and laboratories or by the camera manufacturer.
The maintenance history of each safety camera is documented and monitored.
Fixed safety cameras are regularly tested and maintained by SAPOL.
Mobile safety cameras are tested by SAPOL every time they are set up. A vehicle is driven through the radar beam at a set speed and the camera readings are checked to ensure that they are correct.
Mobile safety cameras are recalibrated once a year.
Before a new safety camera goes live testing is carried to ensure that the infrastructure, technology and processing complies with all the requirements.
A safety camera will only go live after it has been operating in a test environment for four continuous weeks without error.