3-D alert appropriate-behavior appropriate-behaviour area attention banned cigarettes communicating communication danger direction directive distinctive environment eye-catching glassy health health-risk location no-smoking not-allowed not-permitted permission-denied plastic pollution prohibited prohibition raised sign style surface surfaces surfacing symbol tactile texture textured textures thick thin unhealthy warning wording words access-limited advice advising allocated allocation approved authorised authorized automobiles behave black boom-gate communicate denied emergency emergency-vehicles entry-denied entry-prohibited information informing limited limited-access no-access no-entry red restricted restriction restrictions safety unauthorised unauthorized vehicles white blue care cars caution dangerous law legal no-standing penalties refusal risk risks risky road road-safety road-side signs sky unacceptable verge warning-sign access-denied apology avoid behavior behaviour beware concern construction construction-site inconvenience inconvenient yellow clearway directions keep-clear no-parking no-temporary-parking asbestos damage demolition destruction fence fencing hazard hazardous health-risks keep-out mesh message requirements unwanted parking announcement be-careful deep polluted protect protection rules toxic toxicity water water-pollution water-toxicity weathered lettering semi-transparent surfaced background keep-off no-go secure security signage trespass trespassing