Vehicles can be made of a maximum of 31 individual pieces. Since that's not much, I wanted to see how little I could get away with and still have something recognizable, taking into account that in this virtual space, the wheels don't have to have a direct connection to any part of a vehicle.
Two rails, four tires, body tub, engine, radiator, and gas tank. Add a script that tells the system "this is a car" and you're set. Then you start playing with the numbers in that script, and interesting things start happening. Especially if the ground isn't perfectly level.

Shot taken in Skids Isle sandbox, back in January right before they finished remodeling.

Behind the wheel is my Luskwood raccoon avatar, wearing a shuttle booster backpack I made before I figured out how to integrate the flight controller into a heads-up display.

I'll try to post a regular 3/4 still shot of this car later.