black circle communicating communication denied directing direction directional directive informing no right turn not allowed not permitted parking permission denied prohibited prohibition red reflective road sign sign street sign traffic traffic flow verge warning white appropriate-behavior appropriate-behaviour black and white canine control controlled denial dog dogs-prohibited exception lead leash not-allowed not-permitted permission-denied pets rules appropriate behavior appropriate behaviour care chinese danger dangers english no diving rain rain-drops risk risks signs swimmers swimming water wet alert appreciated area black-&-white cigarettes environment gray grey greyscale health health-risk no-smoking pollution thanks unhealthy alcohol ban banned concern directions law legalities protect protection restricted restriction safety warning sign access-denied barrier closed dutch enrty-denied Gangplank mixed no-entry pier rope ropes sealed ship symbols advice avoid bright limitations limited limited-entry restrictions vehicles yellow exceptions regulations responsible warning-sign beach black-and-white fine no-dogs penalty seashore unwelcome green dangerous inform information prohibitions public-park vehicle