A better way to slow speeders and protect workers in construction zones

Instead of measuring a vehicle’s speed at a specific point ─ like a single, fixed-speed camera does ─ fixed average speed cameras measure the average speed of a vehicle over a longer section of road.

In general, section speed control is based on capturing a vehicle at both an entry and an exit point ─ like the beginning and end points of a highway construction zone ─ with each point equipped with cameras for automatic license plate recognition (ALPR). Each vehicle is recognized at each checkpoint, and the vehicle is matched by its license plate number using ALPR.