This is brilliant. A March article from the March 2004 Harvard University Gazette has a great profile of mayor of Bogota, Colombia. He's a former academic and has been using mimes to encourage people not to jaywalk or behave irresponsibly in public.
Another innovative idea was to use 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.
UPDATE:
Octavio Isaac Rojas Orduña sez: "Antanas Mockus was Bogota's mayor for the 2001-2003 period. Luis Eduardo Garzón is in his place now. So, this news originally took place during 2003."