Roads like the california 1 coastal highway, and the 89A from flagstaff to Sedona, sure people are going to want to drive those and while it may make it marginally more dangerous, it would be hard to make a case for mandatory computer control under good road conditions.

In areas with significant congestion however, such as the entire city of Seattle, requiring computers to do the driving and navigation could significantly improve commute times (by, like, an order of 10 during peak hours), but only if everyone is on board.