But there is a middle ground solution between large buses and trains and single occupant vehicles. Here is another thought experiment, stand by a busy road or

But there is a middle ground solution between large buses and trains and single occupant vehicles. Here is another thought experiment, stand by a busy road or highway for a few minutes. Notice all the single occupant vehicles and how they are all traveling in the same direction. Now picture if some of those occupants were grouped together in the same vehicle and how much more efficient that would be. Lyft line, for example, works pretty well. Wider adoption would make it work better. It should be noted that the U.S., according to recent census data, is "gradually" shifting back to urban core living.