They won't have a choice, actually. Emerging economies like China will eat this up to solve their traffic congestion problems in big cities, and are totalitarian enough to mandate it. Once it becomes a huge economic advantage, the other economies will have to follow just to keep up. Governments are lazy, they will want to push more traffic into their road systems at less cost because you hate traffic and taxes!
Hybrid solutions are also possible: there will be certain roads (controlled access interstates) where driverless is mandatory while certain streets where driver intervention is required. You still get most of the traffic optimization benefits if the driverless roads are congestion bottlenecks. However, the real benefit doesn't come until we have driverless cities, where people don't need to own cars and a roaming fleet of autonomous vehicles serve as pervasive taxis. You could even get rid of parking lots!
The system can easily trace what cars are bad actors and adapt accordingly (shut down traffic in a region with a bad actor until police arrive).
Hybrid solutions are also possible: there will be certain roads (controlled access interstates) where driverless is mandatory while certain streets where driver intervention is required. You still get most of the traffic optimization benefits if the driverless roads are congestion bottlenecks. However, the real benefit doesn't come until we have driverless cities, where people don't need to own cars and a roaming fleet of autonomous vehicles serve as pervasive taxis. You could even get rid of parking lots!
The system can easily trace what cars are bad actors and adapt accordingly (shut down traffic in a region with a bad actor until police arrive).