appropriate behavior appropriate behaviour cigarettes direction environment health health risk no smoking no smoking sign not allowed not permitted penalties permission denied pollution prohibited prohibition sign unhealthy warning black care communication danger dangers denied red risk risks signs swimmers swimming water white access accessibility allocated allocation allowed available awareness blue designated designation letter lettering location official parking parking-area parking-lot parking-sign permission permitted wall alert appropriate-behavior appropriate-behaviour area communicating health-risk no-smoking not-allowed not-permitted permission-denied access-limited behave behavior behaviour communicate keep-off limited-access members membership prosecution restricted restriction restrictions safety trespassing ban banned fishing ground ground-level no-fishing pier symbols waterside directing directional directive informing purple road-sign stop street-sign traffic traffic-flow verge reflective road sign street sign traffic flow fines information no-parking advice directions inform message signage