area backdrop black building construction copy copyspace danger emergency graphic hazard illustration.background industry restricted restriction road roadside roadwork roadworks rust safety security sign site space wallpaper warning yellow ah1n1 animal epidemic epidemy flu H1N1 ill illness lethal man pig piglet roadsign sick sickness signs swine swine flu virus barred bars caution communicate communication control do not do not enter forbidden impede locked notice pipes posted prevent prevented Restrict advice alert announcement assistance be-careful beware buoyancy care circle circular communicating flotation-device information informing kisby-ring lettering life-preserver life-saving-buoy lifebelt lifebuoy lifering lifesaver message no-lifeguard perry-buoy personal-protective-equipment pool red rescue-aid rescue-device ring-buoy risk risks risky safety-device signage swim swimming swimming-pool warning-sign water white access-denied access-limited appropriate-behavior appropriate-behaviour ban banned bicycles-prohibited bylaws concern dangerous denied directions law legal no-wheels not-allowed not-permitted parking pedestrian-care pedestrian-safety permission-denied prohibited prohibition prohibitions restrictions rollerskates-prohibited rules skateboards-prohibited watch watch-out arrow attention electricity energy german germany Greek high voltage industrial lightning Multilingual ocher pictogram power russian turkish cycling-prohibited no-bikes no-cycling symbol advising authorised-entry-only authorized-entry-only behave behavior behaviour construction-site entry-denied entry-prohibited limited-access no-access no-entry unauthorised unauthorized