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A comment on Playing with model trains and calling it graph theory. Parent comment

Re:Playing with model trains and calling it graph theory by d_j_b on Friday May 03, 2019 @12:47PM (#19820005)
I've been doing this too, with mine! A recent discovery is that if you keep all the Y pieces pointing in the same compass direction you seem to end up with a track which is always 100% traversable in either forward or reverse.
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Re:Playing with model trains and calling it graph theory by Someone on Friday May 03, 2019 @08:51PM (#19823537)
That can’t be true, can it?

Traversable doesn’t change if you bend parts of a track, and that can change the compass direction the switches point at.

For example, if part of the track containing a switch has an S shape, moving the switch from the center horizontal to the top or bottom one turns it by 180 degrees without affecting traversability.

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