Two Forms Proof Required For Speed Camera Ticket

NHTSA minimum guidelines for unmanned speed enforcement systems say that the sensor system needs to provide a secondary method to prove a vehicle is speeding. The first can be using RADAR or LIDAR and some methods to determine which lane the violating vehicle is traveling in. What are these companies using as secondary methods? Loop 101 in Arizona talks about using a doppler RADAR system to identify the vehicle and its speed. Another company advertises a scanning LIDAR that scans the highway 100 times per second to identify a vehicle and record its speed. If the lidar system is to be considered for unattended operation, the manufacturer of the system shall provide a secondary method for verifying that the evidential recorded image properly identifies the target vehicle and reflects this vehicle’s true speed, as described in §5.16.2.