The Australia Transport Accident Commission teamed with Naked Communications on this very personal road safety campaign that taps social media to remind drivers, in a very targeted way, to drive safely. Drivers are invited to send safety messages to their loved ones over Twitter, with the hashtag #Homesafely, and the TAC then uses those messages on billboards on specific drivers' commutes home, or in radio messages. The campaign will run until January 14, 2013, and according to Naked Communications Founder/Global Head of Behavioural Science Adam Ferrier, it's produced 3,000 messages in half a day. See more of the executions to the right.