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