Unfortunately, all of those brown road pieces from that set (as well as the Elizabeth station crossing set that reuses the same molds but in normal road grey) are made out of a different more brittle plastic than regular straight and curved road and are very, very prone to cracking now that they are somewhere north of 15 years old (it may be a similar plastic mix to the blue road switches, which are also more brittle than normal road and turn green with heat and sun exposure) Any you find intact are probably already living on borrowed time.
As for replacing them... hmm, any reliable way to lock into the notch in the connecting protrusion that usually gets locked by the clip is probably a good place to start. A more robust insert that replaces the clip and is braced against the outer wall surrounding the cutout for the clip may hold up better. I'll dig out a copy of that set and see if I can design a 3D printed insert, I'd be interested in them for my own sets
As for replacing them... hmm, any reliable way to lock into the notch in the connecting protrusion that usually gets locked by the clip is probably a good place to start. A more robust insert that replaces the clip and is braced against the outer wall surrounding the cutout for the clip may hold up better. I'll dig out a copy of that set and see if I can design a 3D printed insert, I'd be interested in them for my own sets
I have a website where I have been writing about and photographing many of the sets and pieces that I find interesting.
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