A small, city-friendly car (say a Citroen or Smart Car) is covered from nose to tail with a colorful, large advert depicting some well-known consumer product or service. In exchange for driving around their (usually large) city in this mobile billboard, drivers pay little to nothing for the use of a completely maintained vehicle.
Carvertising is not a bad bet for students or young professionals who need a vehicle, cannot easily afford the accompanying costs, and don't mind advertising impotency medication or cellular service while driving to the grocery store.
And now, a word to our sponsors:
Oh, large and clever corporations of the world, please get with the program. See what a viable and powerful advertising vehicle (pun intended) carvertising could be in the U.S. Bring it, and we broke-but-brilliant twenty-somethings will come!