This is my question too. Is this a proven thing, or is it just the author's opinion or intuition? How do you even measure "better citizens"? Lots of drivers wi

This is my question too. Is this a proven thing, or is it just the author's opinion or intuition? How do you even measure "better citizens"? Lots of drivers will say we should build more and wider roads, more motorways, and so on. But there are some arguments for not doing that. The obvious thing or the intuitive thing is not always the right thing to do.