There are many interesting options to explore and some of them being developed here in Europe. What I think we need is some sort of development and test environment where these "new" technologies could be tested in real life conditions and against each other, so as to understand the advantages/disadvantages of each. Maybe a program in a few cities where circulation of fossil fuel powered vehicles is abolished.
As you point, commuter traffic will likely move from individual to collective vehicles, mostly on rail. Still for inner-city freight and some jobs (e.g. mail distribution) self-powered, out-of-rail vehicles may still be required. On that chapter I'd like to point two technologies being developed in Europe:
Highly aerodynamic efficient, single passenger, human/electric powered:
Compressed air powered (still waiting for aerodynamic improvement):
Vencit omnia veritas.
Hyrban
"Open Source car" initiative.
He's aiming to provide the cars as a service, rather than in a conventional transaction model, and that's one of the reasons why the entity he is using is Riversimple Limited Liability Partnership "Any economic unit can emit money. The serious problem is to get it accepted" Hyman Minsky
We will pursue our purpose by working systematically towards the elimination of the environmental impact of personal mobility.
How is he going to do that using fossil based fuels is beyond me... Vencit omnia veritas.
