Not only cars....aircraft as well. Here, take a look at this. There are seven videos in all related to this and the miniature airport these guys rigged up - list available at the end of each video. It is amazing how they control not only the aircraft bit also the airfield traffic (cars, tractors, coaches, tow-trucks, luggage vehicles...you name it. And hangar doors, taxiway and general lighting etc....simply amazing. Even the aircraft strobe lights are so real with double strobes for airbus etc.
I really admired the way the aircraft taxi and turn around so realistically. It;s a pity that the commentary (which is very prolific - even more than that of Nannu PecLou's I think
) is in German - I could only make out a word here and there, but the visuals are great. Look out for the A380.
Everything is scratch built, as you'll see in the videos.
Enjoy it...I surely did.