Based on a previous model, I have added a rig for this 18-wheeler. Included is the truck, the plane which the tires stick to, and a curve for the truck to follow. I applied a lot of the modifiers (mostly mirror, but not subsurf) from the previous model, so the base poly count is high. I have included images of the subsurf'd and non-subsurf'd models.

Doors open, but there's nothing inside but a black void. The front wheels turn, and the rear mudflaps can blow in the wind (though this uses curves and empties, not the armature). No warranties about fitness for use.

[ed. note] About the video, the [original model](https://www.blendswap.com/blends/view/88192) is red, and my earliest tests were with a copy of it. The final (ha) rig is on the blue truck (this blend), and is in the images and seen at the end of the video.

https://youtu.be/JYeo4N9eNZg