A network of automated license plate readers (ALPRs) mounted on police cars, streetlights, and highway overpasses captures billions of license plate scans annually, building detailed movement profiles of virtually every driver. Private company Flock Safety has created a de facto nationwide surveillance system, running all plates against FBI databases. NYPD used ALPRs to spy on Muslims at mosques. Data shows disproportionate deployment in communities of color. 100% of departments serving 1M+ residents use the technology.