I found this ad to be very clever due to its unique way of showing that McDonalds is open at night with the spotlights that are shining the light to light up the display create the famous golden arches.
Nice little advert for Jeep by Dannish agency Bates Y&R. The Jeep parking space event took place over a few weeks in the spring of 2007 in Copenhagen. The main objective being to make the Jeep brand part of the urban enviroment in a surprising way.
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.