[notatoad]

neither are roads.

it doesn't matter how full the bus is when the road is empty, but the number of cars that a bus is taking off the road at peak road usage time is pretty close to the full capacity of the bus, in any bus system i've ever ridden.

[fatbob]

Good point - maybe buses will stay around just for peak usage, but will be replaced by rented, right-sized self-driving cars for the rest of the time.

[michaelmior]

This is assuming that everyone who is on the bus would be driving/riding in a car instead, which I'm not sure is true.