Flashed at 60kph

[XR Martin]

Originally Posted by Fev

The camera doesn't differentiate, the sensors in the road do.
They measuring the time it takes between axles to cross each sensor (time x set distance = speed) measures the speed.

They measure each side of the road and each lane has a separate set of sensors - you can usually see these in the road - the black strips.

For eg: 2 lane road, 4 lines - two for one side of the road stretching just across the closest lane and 2 more having to stretch the whole way across all 4 lanes to measure the farthest side.
Sensors In red
^ ^
|___|___|
|___|___|
|___|___|
|___|___|
|___|___|

The camera just records an image of the incident so it can track the plates. The sensors in the road are the parts that do all the work, differentiating the lane and vehicle speed, tracking down terrorists and villains and whatnot.

Fixed camera, yes you are correct.
But he was not photographed by a fixed camera.