United Kingdom Considers Placing Cameras on Cars to Spy on Other Drivers
Under a British scheme being proposed to enforce nationwide congestion charging, more than a million vehicles would be fitted with cameras to photograph the numberplates of those who failed to pay. The �spy cars� would use radio signals to check whether the car driving in front had paid the toll for the road on which they were travelling.
Camera spies in million cars to trap toll cheats, Times UK, September 19, 2005.