As luck , karma, etc. would have it, I will soon be building my own 1/32 home track, a replica of a real track I raced in the 60's, Austin Raceway Park, sourced through a kind member of the HRW forum. Two 4 lane tracks should just be enough.
But in my search for such gold, I came across mysterious posts and foreign youtube videos of an Artin 1/32 Digi Pro track system that allowed running 6 digitally chipped cars to run on a two lane track. I have not seen a review of Digi Pro and assume it was a marketing failure much like Artin 1/32 analogue.