These trucks are a great example of how to push traditional advertising and make it something fresh and eye-catching. I think this might be concept work rather than actual ads, but the idea could be a great way to utilize semis, buses, and more.
Check out this satirical advertising campaign for the Charity Cordaid. The items are not for sale. The purpose of the advert is to highlight the difference between how consumers in the Western World look at material products. Oh the shame of it.