If they could automate vehicles this wouldn't be an issue. The current tech isn't there so what if we put them on tracks so they can't crash? We could make them bigger so lots of people could go at the same time and fewer vehicles would be on the road. You wouldn't even have to own it, they could have a regular schedule so you know where and when to ride in one!
Nah, that will never work. Beeping at a driver occasionally though, that will fix things.