
A recent strike in London forced many people to commute the old fashioned way: by foot or by bike. Substitute buses picked up the moving masses and many people remembered the fabulous idea of car sharing.
It gave us a glimpse into the future of mass transport: we eventually have to use our own bodies again or "share" more.
While oil prices going up again using a car will be unaffordable for many and even public transport will become more expensive as well.
Unless we change from a oil based transport system to a renewable energy transportation will become very expensive. But also urban planning has to be improved in the US and Europe to many cities have sprawled to far apart, making daily live more like a long commute / drive from home to work and back.
Cities and communities used to be more integrated: living, shopping, learning, entertainment and work much closer together.