I rode past an ANPR (Automatic Number Plate Recognition) vehicle today and decided to turn around and ride past it a few more times to see how they are set up. It seems as though they only scan oncoming traffic - so they will read the number plate on the front of your car. They have one setup on the main road just around the corner from where I live. There are 4 lanes of traffic, 2 going each direction. 3 highway patrol cars were scattered in the area not more then 200 meters apart. 2 marked Holden sedans and one stealthy, completely unmarked Holden wagon. Anyway, my question is, do these ANPR vehicles/cameras only scan oncoming traffic? If that's the case, anyone riding a bike unlicensed or unregistered wouldn't get picked up.