This is actually completely backwards. You can't control people's minds, and you can't have traffic cops on every street corner at all times; enforcement is extremely limited in what it can accomplish.

But you can build infrastructure that makes it harder to drive dangerously -- and this works on people no matter how erratically they want to drive. People don't want to wreck their cars -- if you build infrastructure where unsafe driving is very likely to lead you to smash into a curb or median or divider, even really dickish drivers will drive safer.