Absolutely. It's just not viable in every situation and every lifestyle. Sparse rural areas, for example, are always going to be extremely difficult to remove cars from since the population is too dispersed for things like a central bus line or trains that reach everyone. I think cars will be impossible to remove from rural areas until automated cars are common. If people can call a public automated car within 5-10 minutes, they'll give them up, but until then, it's going to be very difficult to get people to give up individual cars.

Now, cities, on the other hand, they should be able to ramp up public transportation and eliminate a LOT of cars. Make every bus, every train, every whatever, run every 5 minutes, 10 absolute tops. Make it so people don't even bother to check schedules, they just walk out to the bus stop whenever because they know they'll get where they're going pretty soon. Every time someone sits at a train or bus stop for 15 minutes trying to go get groceries or other every day tasks, they get a chance to sit and dwell on how useful a car would be.