Hoping someone can use this roadbed. Don't know it's name but it's common commercial use is carpet underlayment for airports and other high traffic areas. It is rubber-based, heavy but cuttable with a sharp utility knife and a steady hand. The piece draped over my traffic cone shows the flexibility. Some precut curves appear to be 054 (the short piece of track in the picture) and 063 (longer track piece) . It is about 5/16" thick and was lightly glued down to it's prior layout. Email in profile. As they say, Free to a good (or bad) home !