3-D alert appropriate-behavior appropriate-behaviour area attention banned cigarettes communicating communication danger direction directive distinctive environment eye-catching glassy health health-risk lettering location no-smoking not-allowed not-permitted permission-denied plastic pollution prohibited prohibition raised semi-transparent sign style surface surfaced surfaces surfacing symbol tactile texture textured textures thick thin unhealthy warning wording words asphalt barrel build building bulldozer caterpillar construction dig digger excavator lay machines not ready road roller steam track work access-denied advice background behave behavior behaviour blue communicate denied directions entry-denied entry-prohibited fencing information informing keep-off limited-access mesh no-access no-entry no-go red restricted restriction restrictions safety secure security signage trespass trespassing unauthorised unauthorized white acceptable access-limited advising allocated allocation approved authorised authorized automobiles black horses horses-not-allowed horses-not-permitted limited motor-cars parking permitted signs vehicles business closed no entry not open shop shop sign care cars caution dangerous law legal no-standing no-temporary-parking refusal risk risks risky road-safety road-side unacceptable warning-sign bonfire circle do not fire illegal no bonfire prohibit quit roadsign roadsigns stop