Some help from knot theorists would be appreciated. Here is a photoshopped picture of a freeway (based on a real one in Oakland, California) that needs to be untangled.
(Tip of the cap to Stanley Somers.)
Note: The original version of my post described the picture incorrectly as being an actual freeway. See this link. Also, this freeway is knotted up even more severely. :)
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