That's an interesting point. I think you may see something similar to tourist districts today where the streets are closed to traffic outside of certain hours.

That's an interesting point. I think you may see something similar to tourist districts today where the streets are closed to traffic outside of certain hours. People drive near the area and continue on foot. Autonomous vehicles may be even better for this, as a person could be dropped off at the closest accessible point, then the vehicle retreats to a lower-density area.