I've done some research and Gatso's are only meant to take snaps of a vehicles rear, where as a truvelo camera is setup to take snaps from the front. "The forward facing Truvelo camera system is designed to take photographs of the front of a passing vehicle, this allows the picture taken to show the driver of the vehicle as well. To avoid the 'flash' which is given out by a rear facing Gatso camera the Truvelo system uses an infra red flash which produces no visible 'flash' to the approaching driver. These rely on 3 white-lines in the road, painted just before the camera, and are triggered