Highway Engineer Pranks

We’ve been deeply into highway interchanges here recently — immersed in the task of identifying double trumpets and whirlpools and many other specimens in satellite photos. After seeing our pieces on the subject, a tipster sent us these more whimsical and theoretical examples of exchanges from the very clever comics site XKCD. The “Rotary Supercollider” is deliciously evil.

More after the jump.

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http://imgs.xkcd.com/comics/highway_engineer_pranks.png