Here is something which will definitely work in Indian driving conditions. A Belgian road safety organization has come up with an amazing advertisement that features an iPhone app that plays music, and adapts the pace of the song to the driver's speed.
As you can see in the video below, the song you select slows down if you are slightly above the speed limit, and stops completely if you decide to flout the rules and ignore the speed limit. It does seem like a very good method to stop motorists from speeding, since quite a few drivers listen to music while on the go.
Do you think this will work, or is it just something that looks good in a video? Do let us know in the comments section.