(Traffic Controller Bruce) Jones, who has one of only two keys to the locked access panels on the portable signs, said that the hacker broke into the panels [arguable] on each sign and bypassed the passwords before leaving five different zombie messages and even changing one of the passwords. Jones said he had to wait until 8 a.m. to call the manufacturing company to figure out how to override the hacker's work [Bruce, please see original article]. He speculated that the hacker could be a computer genius from UT.