Seems like such a great idea on paper. I've seen these parked in various spots in SF. Why do you think they failed? Too asset heavy? I am guessing the cost of vehicles and maintenance, parking spots, regulations etc. was too much? A similar service based on uber model might be more successful, where the company doesn't own the vehicles? Not sure how to provide reliable service that way, though. Perhaps a hybrid?
I think you answered your own question inadvertently! Uber has something called Express Pool, which is about the same service/cost but more convenient. And Uber Pool / Lyft Line are only slightly more expensive but deliver you directly door to door.
