I know it's a blogging no-no to just republish stuff if you don't have original commentary to add, but I was so floored by learning about this yesterday that I just have to share it with you:
[Antanas Mockus, the former mayor of Bogotá, used] mimes to improve both traffic and citizens' behavior. Initially 20 professional mimes shadowed pedestrians who didn't follow crossing rules: A pedestrian running across the road would be tracked by a mime who mocked his every move. Mimes also poked fun at reckless drivers. The program was so popular that another 400 people were trained as mimes.
NPR story—which is even more compelling than the above article—here, starting at 34:00.