Someone's been hacking into roadside traffic signs and changing the messages.
Tuesday morning, a sign on southbound I-255 in Collinsville, Illinois, read "Daily Lane Closures Due To Zombies!" On Monday in Carmel, Indiana, a sign was changed to say "Raptors Ahead -- Caution!" And signs in Austin, Texas, recently flashed "Nazi Zombies! Run!!" and "Zombies In Area! Run!"
Authorities have no suspects yet, but are checking Michael Jackson's "Thriller" video for clues as to who the hacker zombies are.