rolling surveillance devices

Fitted with cameras, microphones, and sophisticated sensors,
self-driving cars have long raised flags among privacy advocates.
Matthew Guariglia, a policy analyst at the digital rights nonprofit
Electronic Frontier Foundation, called self-driving cars "rolling
surveillance devices" that passively collect massive amounts of
information on Americans in plain sight.

https://fortune.com/2024/07/08/chinese-self-driving-cars-us-roads-data-collection-surveillance-national-security-concerns-investigation/