If you truly cared about this you'd be fighting for smaller cars, pedestrian friendly roads, both technological and administrative enforcement of speed limits,

If you truly cared about this you'd be fighting for smaller cars, pedestrian friendly roads, both technological and administrative enforcement of speed limits, open firmwares, repairability and documentation on cars. Technical speed limit enforcement absolutely can be done in a way that respects autonomy and privacy. A car can have a camera, a one way data link for maps, a gps, and/or a transponder for signals from speed limit signs preventing it from exceeding the default speed limit without a positive signal/mapped limit or active intervention from the user. None of these things require an uplink, and if you cared about autonomy, privacy, cost, and safety you'd be pushing for such a solution as well as actually caring about the telemetry in almost all new cars without these features. Cars are costly primarily because they are much bigger, much heavier, and much harder to maintain than they need to be. If one didn't have to deal with the near certainty of getting t-boned by a ford ranger or suv doing 20 over the limit in one's lifetime then a microcar capable of 40km/h with a simple lap belt would be safer than the average 1.5t sedan full of airbags (and the requisite limitations on user maintenance) is now. Additionally with options other than lugging around 2-4t of steel and plastic and covering half the city in vast seas of asphalt available, 80% of people would get to their destinations faster.