Speeding

mobile cameras to capture it through the side windows of the truck or if the window has to be open?

I was driving down the highway today and saw a mobile speed camera van sat on the bridge with the side of the truck off the highway, but the window of the van was locked. I just wondering.

Speed cameras are not meant to photograph that is driving! A speed camera basically measures the speed of vehicle is pointing. The camera emits a laser beam that is reflected in the white vehicle, received by the camera, and then the vehicle speed are calculated from speed / distance / time formula. If the target vehicle is speeding, the police or pull the car, or a note his badge number for trial. Have you been speeding in his white van, then?

Escort Passport 9500 detecting mobile speed camera