A field guide to spotting Seattle's hidden surveillance infrastructure

A 2020 community workshop turned walking tour maps the layers of “smart city” surveillance woven into downtown Seattle, from ubiquitous cameras to Amazon Go stores that track shoppers via overhead vision systems and tie in-store behavior back to online purchase history. The guide treats each technology as a specimen to identify in the wild, documenting its appearance, function, and the policy vacuum around it.

The core case study is the automated license plate reader. Seattle’s Department of Transportation runs at least 99 stationary ALPRs for traffic timing, while SPD operates 19 mobile units for parking and law enforcement, with retention periods stretching to 90 days for police data. The authors highlight how OCR-based plate capture, combined with rampant inter-agency data sharing and private brokers like Thomson Reuters CLEAR, enables de facto movement tracking despite official denials — a textbook case of scope creep absent meaningful regulation.

The piece is less a technical exposé than a civic primer. By pairing each device with discussion prompts about consent, disparate impact, and alternatives, it pushes readers to question whether convenience gains like travel-time estimates justify the privacy surface they create, and points to California and Minnesota’s ALPR data-sharing limits as evidence that legislative pushback is possible.