[npunt]

On the other hand, Lyft Line and Uber Pool seem quite efficient.

Supershuttle was concentrated pickup but distributed dropoff, whereas with network effects leading to more vehicles & considerably more efficient routing, you can even that equation out a bit more.

[kbenson]

I was thinking along the lines of alternating between a distributed pickup and concentrated drop off and concentrated pickup and distributed drop off. That is, you use these for last mile travel at either end of a commute artery.

Given there are many different bus/rail stops along a route (and many routes for buses), there's a relatively small geographic area to pick up in and drop of to when the other side of the trip is bus/rail. So you might have an automated van drive through an area and make a quick 4-6 pickups in a few block area, drive to a bus stop or rail station, drop those people off, and pick up 4-8 people for drop-off in close geographic proximity. Rinse and repeat.

The point doesn't have to be that they solve the last mile by replacing current mass transit, but by supplementing it in a way that allows for people that were far enough away that it was hard to use previously now have an easy and cheap way to do so, because you've expanded the coverage area of mass transit stations.