The explosion of full color images on special plates has also created some concerns for law enforcement’s use of Automated License Plate Readers (ALPRs), which automatically scan the plates of cars as they drive down the road or through tolls. Many police cars are equipped with ALPRs that scoop up all of the plates that drive by. A report by the American Association of Motor Vehicle Administrators warned that high contrast backgrounds in these special plates can cause readability issues for ALPRs.