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What is this pink railroad tie for?
(lemmy.world)
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You can see 3-4 wires connected on either side of the plates.
I'm not sure if those particular plates are insulating connections though. Doesn't really look like it, but I'm no expert on rail connections.
good spot, those wires are smaller than I am used to seeing - so it is a track circuit boundary as well as whatever the pink means.