Automotionfx uses Glowforge draft board and likely the Glowforge to laser cut the roadway and engrave the underside groove for the ferrous rods. It appears that way from the roadway pieces I have.
I've laser cut the roadway and upper city parts. Next will be engraving the groove.
Not sure what maintenance issues Lee had. This roadway system in HO is used extensively in GB according to YouTube videos.
I guess I'll see.