Quote: The original Spit Bridge cameras 2 of them were taken out and moved to the F1 up from the Hawksberry bridge going north. They were moved because they had been successfully challenged too many times by the Lawyers and their friends of Mosman and surrounding suburbs. Wealthy people dampen the revenue stream.
As a matter of fact
They were removed because they were installed in an environment that demonstrated the faulty nature of the cameras.
Bus drivers were being books at speeds unattainable by busses uphill.
They were successfully challenged when they were proven inaccurate.
The vibration from the busses were setting off the piezoelectric sensors prematurely indicating an impossible speed.
Speed cameras measure speed over. Metre only
The sensors pick up the first signal, transmit it to the computer housed in the box on the side of the road.
Then they get the second signal when the vehicle passes over the second sensor.
Now
The sensors degrade over time and use, thousands of times an hour is far more than they are designed to work.
The road ENVIRONMENT is also very sympathetic to electromechanical equipment....NOT
The roads can range from negative temperatures to 60, 70, 120 Deg and more.
Then there is the computers housed in boxes on the side of the road.
Subjected to varying temperatures similar to the sensors.
And to add insult to injury, vibration from the trucks, cars and wind does wonderful things to electronics.
Add a little humidity, rain and even varying electrical current and you have the perfect ENVIRONMENT for highly accurate speed measurement.........NOT
ACA tried to obtain records of accuracy, calibration and repeatability.
They asked for the required Estimate of uncertainty of the cameras under the FOI laws and were denied the data.
Speed cameras are as accurate as a two Bob watch.
They are used in a corrupt and deliberately secretive manner to raise revenue.
They have no influence on safety WHAT SO EVER.
Anyone who thinks otherwise is a FOOL.