Automatic License Plate Readers (ALPR) have long helped law enforcement in solving crimes and recovering stolen vehicles. ALPRs capture computer-readable images oflicense plates, allowing officers to compare plate numbers against those of stolen carsor wanted individuals on a database like the NCIC.
ALPR cameras can be installed on vehicles ("mobile ALPR") or attached to fixed objects like traffic lights ("fixed ALPR").
The information by ALPR cameras can help determine whether a vehicle was at the scene of a crime and to discover vehicles that may be associated with each other. Law enforcement agencies can choose to share their information with other agencies. The cameras can also integrate information from national or state crime databases to provide real-time alerts when a vehicle associated with a known suspect or a stolen vehicle passes the camera.