(The mayor) realised that the people of Bogotá were more concerned about social disapproval than traffic fines, and so hired mimes to playfully reproach drivers that crossed red lights, blocked junctions and ignored pedestrian crossings. One cannot police by mimes alone, and in a further measure to address driving behaviour, the mayor’s office brought in flashcards to allow social feedback. Each citizen was given a red card to signal to someone that their driving was poor and a white card to signal that the person who been particularly courteous or considerate.
The reason the mimes and cards worked, Bell argues, is that people learn “collegiate behaviour by social feedback,” and that the best methods of such feedback offend us the least. One other advantage that this system has over, say a “How’s My Driving?” bumper sticker, is that the feedback is instant — although not cataloged for other drivers in an Ebay style feedback system. This advantage comes at the risk of prompting more road rage incidents in other countries. Still, giving someone a red card is kinder than flipping them the bird.
Addendum: An online forum for calling out bad drivers.
Hat tip: Rory Sutherland