The good folks at the Ad Council recently help create the Speak Up Or Else campign to address reckless driving amongst teens. The site asks teens to use peer pressure to confront their friends' bad driving:
Why speak up? Because reckless driving is the #1 killer of 15-20 year olds. Speaking up could save your life. Look, we get it. You don’t want to make it a big deal when your friends are driving recklessly. But, you don’t have to seem like a downer, lecture them or sound like their mom. Speak up in your own way. Just remember, it doesn’t matter what you say, if your friends are driving recklessly, say something.
The site has several suprisingly fun PSA's, and teen-friendly features like videos that can be IM'ed (Instant Messaged) as pranks.