Forgive my ignorance, but what is the purpose of the cable slots that just end and/or don't follow the lineage of the track like at your copyright and on the right side?
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I'm not certain, and I haven't been able to find any answers online. Looking more closely at them, my educated guess is that they are not channels for the grip but rather flangeways for wheels. This would make the piece symmetrical, and allow it to be used in either side of the crossing rather than having two distinct parts.
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