Why not just install speed limiting software in the cars? You could literally make the cars incapable of getting a speeding ticket in a way that doesn't violate user privacy. Ford won't because they love selling murder machines and they know that with the culture around cars in the US nobody would buy them.
Speed-limits aren't uniform, so you'd have to have some kind of GPS connectivity as well as an up-to-date database that tracks what the current speed-limit is and where the user is (good bye privacy). Also better make sure the software doesn't think you are on the 30mph access road that is beside the 70mph highway.
It would be a terrible idea, but maybe not worse then what the article is describing.
Some Ford cars already have camera systems that can recognize speed limit signs and limit cruise control speeds. They could just use that instead of developing something that fines and jails people