Warrantless Use of License Plate Reader Cameras Is Unconstitutional

August 17, 2025 • 16:12

A new campaign pushes back against the widespread use of automatic license plate readers without warrants.

Read the full article at Reason


Summary: Warrantless Use of License Plate Reader Cameras is Unconstitutional

Quick Overview

The Institute for Justice (I.J.) has launched the Plate Privacy Project, a national campaign aimed at combating the warrantless surveillance enabled by automatic license plate readers (ALPRs). This initiative highlights growing concerns over privacy violations as law enforcement agencies increasingly utilize these technologies without proper oversight or legal justification.

Key Points

  • Introduction of the Plate Privacy Project: The campaign seeks to address the unregulated use of ALPRs, which capture and store vast amounts of vehicle data.
  • Technology Overview: ALPRs combine high-speed cameras with optical character recognition to identify and log license plates, often without a warrant.
  • Widespread Use and Legal Concerns: A significant majority of larger law enforcement agencies use ALPR technology, raising questions about privacy rights and constitutional protections.
  • Real-World Implications: Instances of wrongful arrests due to ALPR errors illustrate the potential dangers of this surveillance technology.
  • Public Backlash and Legal Action: Growing community opposition has led to some towns terminating contracts with ALPR providers, indicating a shift in public sentiment.

Detailed Breakdown

Introduction of the Plate Privacy Project

The Plate Privacy Project, launched by the Institute for Justice, aims to challenge the rampant and unregulated use of ALPRs across the United States. This initiative is a response to the increasing revelations about the extent of surveillance that citizens face, both from government and private entities. The campaign intends to propose model legislation to protect individuals from warrantless surveillance and to engage with local activists to resist ALPR implementations in their communities.

Technology Overview

ALPRs utilize a combination of high-speed cameras and optical character recognition technology to capture the license plates of vehicles. These systems can scan up to 2,000 plates per minute, recording details such as time, date, and GPS coordinates. Unlike traditional traffic cameras, which monitor specific violations, ALPRs indiscriminately photograph all passing vehicles, creating a comprehensive database of vehicle movements.

According to a 2024 Congressional Research Service report, nearly 90% of sheriffs’ offices with over 500 sworn deputies utilize ALPR technology. The Bureau of Justice Statistics indicates that 100% of police departments serving populations over one million employ these systems. This widespread adoption raises significant Fourth Amendment concerns, as the data collected can be accessed by law enforcement without warrants, leading to potential abuses of power and violations of privacy.

Real-World Implications

The dangers of ALPR technology were underscored by a high-profile incident in August 2020, where Colorado police mistakenly arrested Brittney Gilliam after an ALPR flagged her vehicle as stolen, despite it being legally registered. This incident exemplifies the risks associated with the technology, which can lead to wrongful detentions and a general atmosphere of surveillance that undermines public trust and freedom.

In response to privacy concerns, some communities have begun terminating contracts with ALPR providers like Flock Safety, reflecting a growing backlash against intrusive surveillance practices. The I.J. has filed lawsuits challenging the legality of ALPR usage, asserting that accessing this data without a warrant constitutes an unlawful search. The ongoing legal battles and increasing public awareness signal a potential shift towards greater privacy protections.

Notable Quotes & Data

  • “These cameras photograph every vehicle that drives by… creating an atmosphere where everyone knows they are being watched and tracked whenever they hit the road.” - Institute for Justice
  • “According to the Bureau of Justice Statistics’ 2020 Law Enforcement Management and Administrative Statistics Survey, nearly 90% of sheriffs’ offices with 500 or more sworn deputies reported using the technology.”

Context & Implications

The Plate Privacy Project highlights a critical juncture in the debate over surveillance and privacy rights in the United States. As technology evolves and becomes more integrated into law enforcement practices, the need for robust legal frameworks to protect citizens’ rights becomes increasingly urgent. The campaign’s success may pave the way for stronger legislative measures to safeguard privacy and limit unwarranted surveillance, reflecting a broader societal demand for accountability and transparency in policing practices. ctices.

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