EFF’s State Legislative Agenda to End ALPR Mass Surveillance

Police agencies across the U.S. have deployed Automated License Plate Readers (ALPRs) to capture images of passing vehicles along with time, date, and GPS coordinates. While the technology itself isn’t new (ALPRs have existed in various forms for more than 50 years, and in the U.S. since 1998), the surveillance landscape has shifted dramatically. Rapid advances in artificial intelligence and national data sharing have transformed police ALPRs into an interconnected, nationwide tracking network. It is pitched to city councils by law enforcement and private vendors like Flock Safety, Motorola Solutions (Vigilant), and Axon as an essential tool for solving violent crime.

In reality, it is an inherently dangerous infrastructure of mass surveillance.

Since 2012, EFF has worked with others to expose the severe digital rights harms of ALPR systems. For example, we’ve recently documented how these camera networks allow law enforcement to search for immigrants, track peaceful protesters, target Romani communities, and track women seeking reproductive healthcare. Police also routinely use ALPRs for low-level matters like enforcing school residency requirements or investigating noise complaints. Many officers also use ALPR databases to stalk past romantic partners. Recent EFF analysis revealed officers using the system without legitimate justification—logging search reasons like "LOL" and "LMAO."

Understandably, the public backlash to police ALPR technology is accelerating, and state lawmakers across the country are taking action.

New Hampshire enacted the nation’s first state law on ALPR use in 2007, but technological advances and misconduct have driven even more recent legislative action. In 2026 alone, six states enacted laws that limit police use of ALPRs: Connecticut, Kentucky, New Jersey, New Mexico, Oregon and Washington.

This is a good start, but far more is needed. This blog presents a framework for state legislators who want to stop ALPR mass police surveillance:

1. Just ban it. It is incompatible with a free society and cannot be fixed.
2. In the absence of a flat ban, reduce its harms. Most importantly: limit police use of ALPRs to real-time comparison of passing plates to hotlists; require a warrant to place a plate on a hotlist; impose strict limits on the creation and use of those hotlists; and prohibit the storage of ALPR data (and thus prevent the subsequent search and disclosure of that data).
3. In the absence of a prohibition on storing ALPR data, reduce its harms. Most importantly, place strict limits on police storage, search, and disclosure of ALPR data.
4. Ban three especially dangerous police practices: placement of ALPRs near sensitive locations like hospitals; purchase of ALPR data; and use of ALPR data to try to predict crime.
5. Require transparency about ALPR mass surveillance, including: a 30-day public notice before a city procures police ALPRs; a statewide registry of all police ALPRs; and regular, public audits and statistical reports about police usage.
6. Ensure effective enforcement of all new ALPR restraints, including by means of a private right of action and the exclusionary rule.

These policy battles often unfold locally, so state legislators must ensure that state law is a regulatory floor, never a ceiling. State preemption s