Hacking electronic road signs.
When the zombiepocalypse comes: don't be a moron like the protagonist of Dead Rising, and decide to seek shelter in the local mall. A shopping mall is just about the worst place to be.
Well, Someone Has To Warn Us About the Zombie Menace
The best one of these was still the Rose Bowl where the Caltech guys changed the scoreboard during the middle of the game from "UCLA" and "Illinois" to "Caltech" and "MIT".
In the face of a zombie attack, I think I'd go for something with a little more stopping power.
2600 had an article a few years back explaining how to do this on the major road-sign models, even some of the large fixed DOT ones. Some do have security features that can be overcome. Track it down if you want to know more.
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