ZUG: Comedy Articles: Electronic Road Signs and Me
http://www.zug.com/gab/index.cgi?func=view_thread&head=1&sort=active&thread_id=64475
"With only a few minutes of road sign hacking, I had programmed an homage to the 1951 sci-fi film The Day The Earth Stood Still, the phrase that was used to stop Gort, the robot in the film, from taking over the world."