Metros (e.g. Paris) & bikes (e.g. most cities in the Netherlands) seem to work very well. Bikes are 5 times faster than walking, 2/3 as fast as a car and metros

Metros (e.g. Paris) & bikes (e.g. most cities in the Netherlands) seem to work very well. Bikes are 5 times faster than walking, 2/3 as fast as a car and metros are even faster (but you have the problem of getting to the metro station).