>
> Am I the only one that has seen, and is somewhat confused by, road signs that say "resume legal speed" after a construction zone, etc?

I think it's because people never really slow down in reduced-speed construction zones, so their speed is illegal there. When they leave the construction zone, their speed resumes being legal. The sign is just to tell them that's happening, so they don't have to feel guilty anymore.

^v^:)^v^
F"a crackpot theory for everything"B