[aninhumer]

Makes more sense in what way? Sure a bus is more efficient, but it's less convenient.

Getting people to take a train for the majority of their journey is far more efficient than having them drive because the bus doesn't stop outside their door exactly when they want it.

Although I can't help wondering if it would eventually become worthwhile to run a full size bus as a carpool taxi vehicle.

[honkhonkpants]

Uber doesn't stop outside your door exactly when you want it, either. Especially not Uber Pool.