cliff coast danger edge England english Great Britain Seaford sign Sussex top warning wooden car cars drive driving forbidden overtake overtaking road traffic ah1n1 animal epidemic epidemy flu H1N1 ill illness lethal man pig piglet roadsign sick sickness signs swine swine flu virus communication electricity power red safety security symbol symbolic voltage volts white wording advice alert appropriate-behavior appropriate-behaviour clearway communicate dangerous denied directions information informing keep-clear law legal no-parking no-standing no-temporary-parking not-allowed not-permitted permission-denied prohibited prohibition refusal restricted restriction restrictions risk risks risky road-safety road-side unacceptable vehicles warning-sign announcement be-careful beware black care careful caution cautious communicating concern conditions Look looking lookout observant road-conditions road-risks rural slippage slippery slow slow-down speed speed-reduction tractor tractors watch watch-out access-denied parking avoid deep health polluted pollution protect protection rules toxic toxicity unhealthy water water-pollution water-toxicity weathered