This is a clever Idea that I though worth sharing. This truck isn’t real, unfortunately, it’s photoshopped. You can see more like it here.
While this looks brilliant on paper, it would work very poorly in reality. In order for the illusion to work, it would need to be seen from a very specific angle and in very specific lighting. Moreover, any relative motion between the observer and the truck would break the illusion. Unfortunate, but still a neat idea.
Reminds me of Julian Beever’s sidewalk illusions — he uses the same concept: http://www.julianbeever.net/index.php?option=com_phocagallery&view=category&id=2&Itemid=8
These trucks from Office Max essentially do this: http://farm3.static.flickr.com/2400/2419615538_5f054b72c6.jpg
http://www.couponingtodisney.com/wp-content/uploads/2011/07/office-max-truck-hidden-mickey-300×220.jpg
I’ve actually seen them on the road. The effect isn’t as impressive as the photo in your post, but it comes across better than you might think.