"Every time a piece of FasTrack is thrown out, an engineer blows his whistle- toot toot"!
With any luck, at best it makes it into a plastic pallet shipping our trains across the ocean.
That said, unless it's disassembled with the metal rails removed, that is just an accident waiting to happen when it hits a plastic shredder. Now I realize the industrial shredder / hammer mill might be able to handle it and it's not like the metal is that strong, but I just don't know what your municipality has for a machine. The track bed is an ABS blend but not marked hat I know of for what exact blend.
And sorry to go doom and gloom, but plastic recycling is somewhat of a myth. I'm not saying it never happens, but at least our local municipality just called it out, stopped lying to the public and just axed the program because it wasn't actually going anywhere but the landfill. I know hat sounds terrible and it is, but at least the lying and telling us it was being recycled and then clearly wasn't stopped.
Again, sorry, the realization that due to some specifics of what FasTrack is and how it's constructed, it might end up in a landfill VS the work required for mechanical separation of the metal and plastic components.
I just read this https://raleighnc.gov/trash-re.../recycling-residents
Again, my thought is, when that get to the sort process, and they see metal rails embedded in plastic, they don't want to jam the industrial shredder and then be cleaning those balled up metal rails wrapped around inside the shredder it sadly ends up in the landfill.
If you want to improve the chances, you could yourself remove the rails before putting into the system.