access-denied advice advising alert apology appropriate-behavior appropriate-behaviour avoid behavior behaviour beware black care caution communicate communication concern construction construction-site danger dangerous entry-denied entry-prohibited inconvenience inconvenient information informing no-access no-entry not-allowed not-permitted permission-denied prohibited prohibition restricted restriction restrictions risk risks risky safety sign warning warning-sign yellow cars clearway denied directions keep-clear law legal no-parking no-standing no-temporary-parking red refusal road road-safety road-side signs unacceptable vehicles white asbestos communicating damage demolition destruction fence fencing hazard hazardous health-risks keep-out mesh message requirements unwanted parking asphalt barrel build building bulldozer caterpillar dig digger excavator lay machines not ready roller steam track work 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 directive 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 behave blue keep-off limited-access no-go secure security signage trespass trespassing unauthorised unauthorized