alert appropriate behavior appropriate behaviour black care concern danger dangerous denied directions law legalities not allowed not permitted permission denied prohibited prohibition protect protection red rules safety sign signs vehicle warning warning sign white circle communicating communication directing direction directional directive informing no parking parking reflective road sign street sign traffic traffic flow verge access denied denying access denying entry forbidden multi-lingual protected restricted restricted area secure security serious stop area cigarettes environment health health risk no smoking no smoking in this area sign pollution unhealthy appreciated appropriate-behavior appropriate-behaviour health-risk no-smoking not-allowed not-permitted permission-denied symbols thanks no right turn black and white canine control controlled denial dog dogs-prohibited exception lead leash pets chinese dangers english no diving rain rain-drops risk risks swimmers swimming water wet advice be-careful beware blue careful caution conditions garden lookout raindrops visitors warning-sign