We'll just build the cars with parts that seldom fail. And we'll make them very strong, so that the only risk from hitting a deer or even a cow is a splash of gore.
That should help eliminate the need to turn. A loud horn and flashing lights will do pretty well for any errant humans that cross the path.
We can even reduce rolling resistance by using steel wheels instead of rubber, and we can make the road a surface of continuous steel for durability.
We can even hitch the cars together so they can't collide with eachother and they can collectively share the propulsion load. (Maybe even with automatic micro payments, so a car with low battery can pay the others to help it along.)
What would we call this thing?