No offence b r, but people seem to lack so much imagination when ideas like this are discussed. There seems to be a collective refusal to wonder at just what the implications of a change such as largely removing private cars from our society might be.
Maybe we could fund far more buses, amazing and safe cycleways, extend the train network, compress and diversify cities, removing the zoning concept that creates the epic commute. Maybe we could localise energy production and democratise public transport, de-privatising it and reinvest all that money that subsidises motorways. Maybe children could safely walk to school on their own, empowering parents to work more, levelling gender inequality. Maybe there would be less of a discrepancy between poverty in urban and rural areas, as the cost of private motoring wouldn't be unduly forced on the rural dwellers.
Call me a dreamer, but my god, it could be amazing!