Ok,so for us luddites, can someone give a short answer on why PN or PPN is limited to 6 lanes max.
In addition, there are the trivial cases for nCars = nLanes and nCars = nLanes+1. (I am saying the from very old memories, but I'm almost sure that it is true.) These charts are easily created manually for either PN or CPN configurations. And when nCars is less than nLanes, one or more spots in the chart can be a bye with only a small loss of accuracy.
As for searching out optimum PPN charts for 7 or more lanes, it was a matter of effort vs demand, i.e. a lot of work with no known demand. I just about overheated my PC searching out the cases covered in the PPN Chart Generation software!
So, how would I go about with a PPN for an eight lane track?
So, how would I go about with a PPN for an eight lane track? Actually, it is 2 -4 lane track.
If you want a PPN schedule for 8 lanes, you need first to know how many cars you want each 8-lane chart to serve.
Then you learn the PPN criteria and write a computer program to search out an optimum chart for each car count.
If you are running times instead of points, then you can go with a chart that is not optimum, relaxing the requirement that each racer face each other racer almost the same number of times with the maximum difference of 1.
Why aren't you just creating two 4 lane schedules since you have 4 lane tracks?
Sorry ... If it were not so difficult, we would probably have done it when we searched out the 3-6 lane varieties!
Consider asking a different question such as describe your resources, your population, and your competition goals and ask for suggestions.