WATCH: 'How many lanes are monitored and is there somebody in there?' - Inside a speed camera van
There is a man (or woman) inside the speed camera vans - it's not just a camera!
The 50 plus speed vans can detect speeding from both the back and front of the vans and at night.
Just because you didn't see a flash does not mean you were not caught!
The cameras have an infrared beam that is able to detect speed and read the number plate of a vehicle.
The cameras can now detect speeding across five lanes, which means they can even detect speeding vehicles on the other side of a dual carriageway.