Executive Summary
Automatic License Plate Readers (ALPRs) are a popular policing technology that uses cameras and integrated software to identify cars by their license plates (and, in some cases, other identifying characteristics). ALPRs have become the subject of sustained online and offline furor in recent months, prompting calls to ban or physically destroy them.
These calls are mistaken. ALPRs are not a new technology—police have used them for decades. While the research is still developing, the best available evidence supports the proposition that ALPRs help reduce crime. And while doctrine is still evolving, there is a strong argument that their use does not contravene the Fourth Amendment as the courts today understand it.
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