Red light cameras need to comply with a standard and don’t be surprised if they don’t.
Red light cameras are a growth industry, but for some reason, the guidelines may not always be implemented.
The camera operating system
Firstly let’s understand the operating system of a red light camera. More importantly, we need to understand the Amber light cycle times, this is the money shot.
How does a speed camera operate
Instant detection. Speed cameras detect the speed of vehicles by using detectors embedded into the road surface or radar technology. Red-light speed cameras also detect vehicles travelling over the stop line or entering the intersection after the lights have turned red.
What type of base code is used to trigger the sequence of an event.
A typical red light camera may use a program logic controller (PLC) thus using ladder code as its base code operating system. This part is interesting because if the cycle times are outside their working parameters the ladder code will send an alert. So far so good right ? Wrong.
If the code parameter of an amber light set to 3.0 or 2.5 seconds for an intersection speed of 60Kms, its here where the millions of dollars are generated.
Lets work on an intersection within Victoria, so the guidelines are set by VicRoads as per table below.
So now if you feel that the amber light is less then guidelines, record this fact with your smartphone. Keep this file as it should stand up in court, as evidence.
The ladder code used to trigger the cameras will log a fault if input or output will malfunction.
The operating system will not log a fault code if the coder, has set the cycle times outside the VicRoads guidelines.
Next time you are waiting for the lights to change, ask your passenger to record the amber light time cycle. We need to keep our trustworthy government honest.
Safe Stopping distances
According to the Queensland Government is takes 69 metres to stop at 80kms. So now we need to measure 69 metres back from the intersection to see if we are able to brake in a safe manner. That’s on a dry road without someone driving too close behind us.
Below is a graph provided by the Queensland government!