I decided to disassemble my roadcourse and use parts of it to build an oval in my basement. It's really more of a tri-oval. Here's a couple of pics of the work in progress:
The track will end up being 18 feet end to end with a 6 foot wide turn at one end. It has four lanes spaced 3.5 inches. As you can see it was a tight fit between the pillar and the wall, but we had just enough room to squeeze it all in. I'll post more pics as the work progresses.