Without government influence, auto manufacturers already have "black boxes" that record speed and other telemetry. I'm very conscious of the erosion of privacy, but I'm a 40-something computer nerd. People actively, deliberately record themselves doing crimes of all stripes and post it to public social networks.

In the states, there's rampant violation of vehicle-related laws and minimal enforcement (fake temporary tags, deliberate obstruction of real license plates, deeply tinted windshield and driver/passenger glass, not to mention rolling stops and speeding)

Modern cars record their speed today, no one bats an eye. Even before in-car tech could do this, you could passively enforce speeding by using toll booth data, but that doesn't happen. Neither side cares enough to bother.