access-denied access-limited advice advising alert appropriate-behavior appropriate-behaviour authorised-entry-only authorized-entry-only behave behavior behaviour black care caution communicate communication concern construction construction-site danger dangerous entry-denied entry-prohibited information informing limited-access no-access no-entry not-allowed not-permitted permission-denied prohibited prohibition red restricted restriction restrictions risk risks risky safety sign unauthorised unauthorized warning warning-sign white avoid communicating denied directions exceptions limitations limited limited-entry regulations responsible rules signs vehicles compound police police-only board car overtakin street traffic ban staff only trespassers zoo 2014 camera media no photography deny fence permission prohibit allow allowed banned dog dogs roadsign 2016 mobile phone no flash no photo phone 2015 do not vector directive no-golf signage