Thanks for the responses. Yes it's the yellow box on top of the black pole I'm referring to and as I thought too, it's both a red light and speed camera.
How does the red light camera work though, how does it know when you've gone over the stop line? It says every part of the car must be before the line when on red...? Does the stop line have a sensor linked up with the camera so when the front wheel touches the stop line the camera gets triggered? Otherwise how would they you've gone over?
Yes I have never gone over the speed limit (90% I'm going under!) and very careful of lights but just curious how these things work and as a new driver I have to be careful.
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