Globing warming should solve it for London. Venice style, with all the streets turned into canals. Much pleasanter.

Driving in a car in London is a mug's game. It just messes it up for everyone else, and doesn't really get you there any quicker. I once had some friends who lived in Ealing and worked in Camden. She used to take the tube, and he'd go by bike. Pushbike. He'd get there quicker than she did, and both of them were faster than anyone going by car.

Cars just don't belong in real cities, any more than horses do. Just a few for old times sake maybe, and to deliver beer (the horses I mean). And the cars for people with disabilities.

And big delivery vehicles don't belong there either, Nothing bigger than a brewers dray. I imagine that should apply to most big cities.