Ogilvy & Mather, Beijing, did this guerilla advertisement for DHL. The vans were meant to get the word out about DHL's Online Tracking. I like that they actually constructed an arrow and attached it to the van, opposed to just creating a sticker. The 3D-ness definitely gives it a better, more realistic effect. Watch a video of the van in action here.
Found the article at Ads of the World.
Found the article at Ads of the World.