characters for edge crossing/edge casing

Matt Rice ratmice at
Sun May 17 03:04:52 CDT 2020

I had looked, but couldn't find any characters suitable for edge crossing/casing
such as tunnel's, bridges in the following paper, suitable for
orthogonal graph layouts.
e.g. vertical/horizontal crossing, somwhat similar to the characters
⤫, ⤫ U+292B-U+292C, but at 90 degrees.

Or another style of crossing which I forget the name of,

Have characters for this purpose been proposed before?

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