Rigs of Rods

I watched the lengthy slideshow. The graphics are rather crude and the lack of scenery is disappointing.
But I'm always curious about new things so I downloaded the latest copy.
Tell me, what is the point of the ROR, what do you do when using it.

I have know idea. I have downloaded it but haven't tried it yet, as it's on my other hard drive. i will check it tonight when I get in from work.