As the Jet ALPR engine is extremely quick and reads every vehicle plate several times this lets the system follow a vehicle and calculate the speed as it passes through the field of view. Every acquired plate siting is documented together with the precise time of the plate capture. The first two reads are used to work out the speed of the vehicle and a third read is used to calculate approximately the acceleration of the vehicle. The speed can be approximated to an accuracy within a few percent.
Plates are captured numerous times. The distance from the camera and the precise time of capture are used to work out the speed and acceleration of the vehicle.
There are various situations where ALPR is previously used and it would be extremely useful to provide either exact vehicle speeds or average vehicle speeds.
Please note that analog cameras do not have identical field of view as our high definition cameras and the findings may not be as precise.
Traffic Incident / Congestion Detection
Curbing Boy Racers on industrial estates
Speed Control on logistics and manufacturing sites
Restricted speed areas
Accident Black Spots
Private Roads and Estates
From the schematic drawing you can see that plates are captured numerous times. The distance from the camera and the precise time of capture are used to work out the speed and acceleration of the vehicle.
Speed is measured between two virtual road markings