Recently I ranted about Bangalore traffic and the need to plonk offenders up for public 'applause'.
Apparently there's a group of professionals here who had the same rant, but took a more genuine Gandhigiri-type approach. They've set up Smiling Drivers - focused on trying to avoid road rage and encouraging a more friendly driving discipline.
Have a looksee at their stuff. For now they've only got stickers and an Orkut community lamenting Bangalore traffic, but will be interesting to see if the folks can sustain this through.