To figure out average speed of a vehicle between two known points, you need to find when that specific vehicle was at point a and point b. Likely this would be done by automated license plate readers and storing when that car was where in some database. Great, now we're tracking the movement and location of vehicles (and people) with no reasonable suspicion of a crime. Surely this information won't be misused this time.
Don’t all modern cars have an always on cellular connection anyway?
I’ve got as big a tinfoil hat as anyone, but I think this battle was lost a long time ago. Automobiles transportation will become closer to flights, where everything is logged.
The majority of new cars probably do have driver tracking (always on cellular), but not all of them. The 24 model of the Subaru BRZ in low trim does not have a cellular modem. The high trims do. Because it's an option, you can easily remove the DCM (driver control module). I did. Most Subarus I've seen since 2015 use the same style of removable dcm and only need a passive adapter to remove.
In context, we should keep in mind that new cars may not be the majority of what's on the road.
