SB 408 amends Georgia's call-before-you-dig law and allows counties to replace existing traffic control devices without having to call, wait and have all utilities locate and designate their underground utilities.  For example, if a stop sign is knocked down and has to be replaced, it could pose a public safety hazard having to wait for all utilities to be located by their respective owners.  The replacement would have to be within a radius of 18 inches from the device's previous location and to a depth that does not exceed 30 inches below the existing grade.