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Author: Roberts, David J.

Title: Automated License Plate Recognition Systems: Policy and Operational Guidance for Law Enforcement

Summary: Law enforcement officers are often searching for vehicles that have been reported stolen, are suspected of being involved in criminal or terrorist activities, are owned by persons who are wanted by authorities, have failed to pay parking violations or maintain current vehicle license registration, and any of a number of other factors. Law enforcement agencies throughout the nation are increasingly adopting automated license plate recognition (ALPR) technologies, which function to automatically capture an image of the vehicle’s license plate, transform that image into alphanumeric characters, compare the plate number acquired to one or more databases of vehicles of interest, and alert the officer when a vehicle of interest has been observed, all within a matter of seconds This project was designed to assess ALPR implementation among law enforcement agencies in the United States, and to identify emerging implementation practices to provide operational and policy guidance to the field. A random sample of 444 local, state, and tribal law enforcement agencies was surveyed. A total of 305 agencies responded to the initial survey (68.7%). Threequarters of respondents (235 agencies, 77.0%) indicated that they were not using ALPR, while 70 agencies (23.0%) responded that they were using ALPR. A longer, more detailed survey was sent to the 70 agencies who confirmed they were using ALPR, and 40 agencies (57.1%) responded. Survey respondents had typically implemented mobile ALPR systems (95%), and were primarily using ALPR for auto theft (69%), vehicle and traffic enforcement (28%), and investigations (25%). Agencies reported increases in stolen vehicle recoveries (68%), arrests (55%), and productivity (50%). Fewer than half (48%) had developed ALPR policies. Over half (53%) updated their ALPR hot lists wirelessly, and nearly half (43%) updated their hot lists once each day. A total of 40% of respondents retain ALPR data for six months or less (n=16). Five respondents (13%) indicated they retain ALPR data indefinitely, while two indicated that retention is based on the storage capacity of the equipment installed. ALPR technology is a significant tool in the arsenal of law enforcement and public safety agencies. Realizing the core business values that ALPR promises, however, can only be achieved through proper planning, implementation, training, deployment, use, and management of the technology and the information it provides. Like all tools and technologies available to law enforcement, ALPR must also be carefully managed. Policies must be developed and strictly enforced to ensure the quality of the data, the security of the system, compliance with applicable laws and regulations, and the privacy of information gathered.

Details: Washington, DC: U.S. Department of Justice, National Institute of Justice, 2012. 128p.

Source: Internet Resource: Accessed October 15, 2012 at: https://www.ncjrs.gov/pdffiles1/nij/grants/239604.pdf

Year: 2012

Country: United States

URL: https://www.ncjrs.gov/pdffiles1/nij/grants/239604.pdf

Shelf Number: 126737

Keywords:
Automated License Plate Scanning (U.S.)
Criminal Investigations
Motor Vehicle Theft
Stolen Vehicles
Surveillance Equipment