alert car care concern prevent prevention protect protection red risk risk area risky safeguard security sign theft risk vehicle warning warning sign white area cigarettes danger direction environment health health risk no smoking no smoking in this area sign not allowed pollution prohibition unhealthy advice appropriate-behavior appropriate-behaviour black careful caution communicate communication information informing large-vehicles less-noise limitations limited message noise-reduction noise-restrictions Noisy outback residential-area restricted restriction restrictions risks rural-area semi-trailers signs symbols town-boundaries trailers transport transportation trucking trucks vehicles warning-sign watch watch-out words balustrade barrier church edge height high ledge paint paint roller painter painting roof roof area rooftop safety whitewash work working workman announcement be-careful beware carpark communicating dangerous directions Look looking lookout observant pedestrian pedestrian-speed reflective shared-area slow slow-down speed traffic health-risk no-smoking not-allowed not-permitted permission-denied prohibited children observance road school schools slower time times zone appreciated thanks