Quick progress report: Commented all the code relating to detecting when the car is off-road. Figured out the memory location that determined which wheel was off. Established the memory location that determined the width of the road, and handles splitting the road between number of lanes and individual roads. Commented some slightly less interesting code relating to lap times, output lamps and various other areas.
Amusing OutRun link: Unbelievable. I have found someone with a more insane project than my own. A real world OutRun cabinet containing a golf-cart... The mind boggles?