There are a few very big benefits compared to buses: - The car carries fewer people at any given time, so needs to stop in fewer places. - The cars are smalle

There are a few very big benefits compared to buses: - The car carries fewer people at any given time, so needs to stop in fewer places. - The cars are smaller and cheaper, so can be more numerous (hence more frequent/available). - The car has dynamic routing, so instead of carrying you along a predetermined route, it can carry you anywhere you want to go and you don't need to wait for the "right" car.