i-Hacked offers this handy tip for the next time you find yourself rummaging in the bowels of a Addco roadside sign: Should it will ask you for a password. Try “DOTS”, the default password.
In all likelihood, the crew will not have changed it. However if they did, never fear. Hold “Control” and “Shift” and while holding, enter “DIPY”. This will reset the sign and reset the password to “DOTS” in the process. You’re in!