A new report reveals how a major U.S. city has been quietly implementing a controversial surveillance program that tracks residents' movements through public transit data, raising concerns over privacy and civil liberties. Officials defend the system as a tool for optimizing transportation efficiency, but critics argue it could enable widespread monitoring without public oversight. The program’s expansion has sparked debates over the balance between urban planning and individual privacy in an era of advanced data collection. Details on how the data is stored, accessed, and protected remain unclear, leaving residents and advocacy groups demanding transparency.