And traffic planners all around the world have tried lots of different measures: dense cities or dispersed cities, lots of roads or lots of public transport or lots of bike lanes or more information, or lots of different things, but nothing seems to work.
Og trafikplanlæggere over hele verden har prøvet en masse virkemidler: tætte byer eller spredte byer, masser af vej, masser af offentlig transport, masser af cykelstier eller mere information, og en masse andre ting, men intet ser ud til at virke.