
By: Anusha Nasrulai
The Washington state legislature is currently considering the Driver Privacy Act, a bill regulating automated license plate readers (ALPRs). ALPRs are cameras that capture license plate information of a vehicle along with location and time information. Currently, many agencies’ retention and sharing of ALPR data is subject only to internal policy, if any exists. The surveillance capabilities of ALPR systems have profound consequences, such as chilling the exercise of civil liberties and invading the privacy of vulnerable individuals, including immigrants or people who come to Washington to access reproductive or gender-affirming health care. The Driver Privacy Act presents the opportunity to raise the floor of privacy protections afforded by the Federal and Washington State Constitutions.
The Driver Privacy Act limits authorized uses of ALPRs to law enforcement, parking and toll enforcement, and transportation agencies. The current bill also puts forth warrant thresholds, a 21-day data retention period, and auditing requirements for agencies. Additionally, the bill places restrictions on accessing and sharing ALPR data and creates civil and criminal liability for violations under the Act. The bill puts specific prohibition on ALPR use around protected activities, including exercising First Amendment rights and accessing healthcare.
Advocates are calling on lawmakers to strengthen the bill by further limiting the data retention period and prohibiting third party vendors and agencies from sharing ALPR data without a warrant.
Eyes on Washington
ALPRs have faced increased scrutiny in Washington state in the past year. In October 2025, the UW Center for Human Rights released a report exposing how immigration enforcement and other out-of-state law enforcement access data from ALPR systems operated by Washington agencies. This is despite the Keep Washington Working Act and Shield Law that are intended to limit local law enforcement assisting federal immigration enforcement and “protect[] people in Washington from civil and criminal actions in other states that restrict or criminalize reproductive and gender-affirming care.” Many municipalities have halted their use or procurement of ALPRs, at least till the state passes guidance. Washington now is at a turning point, to either implement guardrails that protect individuals’ privacy from undue government surveillance, or pass legislation that sanctions expanded use of ALPRs across Washington state.
Flock Safety, a widely-adopted ALPR vendor in Washington, has faced “growing controversy” for enabling ALPR data operated by public agencies to be accessed by federal agencies and other jurisdictions. As of this June, Washington has 80 cities, six counties, and three tribes using Flock cameras. While Flock Safety has received nationwide attention recently, there are other prominent ALPR vendors used in Washington, including Vigilant Solutions (Motorola) and Axon (formerly Taser).
How ALPR data is used, stored, and shared matters because these cameras capture more than license plate information. Law enforcement use ALPRs during real-time investigations, by checking a vehicle’s license plate information against a “hot list” of vehicles associated with an investigation or reported crime. The information collected by ALPRs can be cross-referenced with other law enforcement or public agency databases to identify individuals which vehicles are registered to. Law enforcement can also search historic ALPR data to track the direction, speed, and travel patterns of a vehicle. In aggregate, ALPR data can reveal sensitive information about where an individual frequents and their travel patterns. Furthermore, ALPR photos can capture the likeness of drivers, passengers, and nearby surroundings.
Constitutional Concerns
The specific protections provided by the Driver Privacy Act are guided by Constitutional principles. The surveillance capabilities of ALPRs can have a “chilling effect” on the exercise of Constitutionally protected activities. Awareness of constant surveillance may alter or deter people from exercising their protected rights of expression, association, and religion. These concerns are valid given historic law enforcement surveillance of political rallies, protests, and places of worship.
ALPRs also implicate the Constitutional right to privacy. The Supreme Court has not required a warrant for law enforcement to collect and search license plate information because there is a diminished expectation of privacy due to the systematic regulation of vehicles and drivers’ movements taking place on public roads. Though, the Court has also addressed in United States v. Jones , Carpenter v. United States, and Kyllo v. United States, whether law enforcement’s use of emerging surveillance technologies infringes on Fourth Amendment protections.
The Supreme Court has found that a warrant is required before installing a GPS tracker or obtaining cell site location information (CSLI) to track an individual’s long-term movements. Justice Sotomayor wrote a concurring opinion in Jones highlighting how emerging technologies have enhanced law enforcement surveillance capabilities without physical intrusion: “GPS monitoring generates a precise, comprehensive record of a person’s public movements that reflects a wealth of detail about her familial, political, professional, religious, and sexual associations.” The aggregation of ALPR data to reveal historical travel patterns raise concerns similar to those articulated in the Jones concurrence. Similarly, the Court in Carpenter, was concerned by how CSLI time-stamped data provides an intimate view into a person’s life and is cheaper and more easily accessible compared to other surveillance strategies. This is comparable to retained, historical ALPR data.
The Supreme Court recognized in Kyllo that people’s Fourth Amendment protections should not be left to “the mercy of advancing technology.” Law enforcement use of sense-enhancing technology in the form of infrared scanners to collect information “that could not otherwise have been obtained without physical ‘intrusion into a constitutionally protected area,’” was found to be a search subject to Fourth Amendment protections. While cars have lesser Constitutional privacy protections than homes, modern ALPR systems with embedded AI also provide law enforcement with extra-sensory capabilities that may implicate the Fourth Amendment.
Federal courts have yet to conclude that police use of ALPRs violate Fourth Amendment search and seizure requirements. The Washington State Constitution provides an affirmative right to privacy, enshrined in Section 1, Article 7. Washington courts have interpreted this article to create a higher standard for lawful search and seizures. As of December 2024, 18 states already have ALPR laws, with more states considering passing ALPR legislation. Washington is now contemplating joining these states in passing ALPR regulations.
Where the Bill Stands Now
The Driver Privacy Act has already passed in the Senate with amendments. The House Civil Rights & Judiciary Committee will hold a public hearing in consideration of the amended bill on February 18th.
The Driver Privacy Act not only regulates the use of ALPRs in Washington state, but it can also create meaningful privacy protections for all Washingtonians.



