aircraft airplane beware black caution danger fly plane red road security sign travel triangle warning yellow ban banned entry human illegal man no prohibit prohibition roadsign signs tresspass woman alert forbidden plate prohibited street traffic transport way blue fish fishing fishing port forbid harbor harbour sea signal white bar barrier crossing cutout fence isolated rail railroad railway Railway crossing roadsigns arrow city direct direction directions graphic grid honeycomb inform orange point reflect reflective warn atlantic fjord hills islands islets lighthouse norway ocean rock sky tower water appropriate-behavior appropriate-behaviour care communicating communication concern dangerous denied disapproval disapproved information informing no-standing not-allowed not-permitted permission-denied prohibitions protect protection restricted restrictions risks risky roadside rules safety sun-rays sunlight sunlit symbols warning-sign children circus England english funny Great Britain humorous humour joke London sell slavery sold break broken cold crack fissure fracture glacier ice melt melting nature