Race management system and track design software for slot racers. Ultimate Racer is a lap counter, lap timer and track layout editor It is based on many years of slot car experience and has been continuously upgraded according to user Download · Layout Editor · Layout Archive · Track Examples.
raccontidiviaggi.info provides extensive an extensive slection of HO scale slot and slotless track layout plans.
Here are some of the available software programs for figuring out your own slot car track design. I have linked directly the the developer's site.