acceptable advice advising allocated allocation appropriate-behavior appropriate-behaviour approved blue communicating communication directing direction directional indication indicator letter lettering off-road parking parking-bay public pullover roadside sign signs symbol symbols cutout isolated mountains paths road roads roadsign trails wooden alert announcement avoid be-careful beware black care caution concern contaminated contamination danger dangerous deep denied directions health information informing not-allowed not-permitted permission-denied polluted pollution prohibited prohibition protect protection red risk risks risky rules safety toxic toxicity unhealthy warning warning-sign water water-pollution water-toxicity white Athens berlin board Cairo cities compas cross crossroads distance indicate janeiro lennestadt London name path pedestrian point pointing pole rio roadsigns rome signboard street traffic Sydney Tokyo Vilnius warsaw camera cctv constant continuous electronic lookout notice observation observe protected secure security surveillance under-observation video watch watched environment expectorate expectorating health-risk historic-sign no-spitting old railway-platform spit spitting ban banned cease cigar cigarette cigarettes death die disease forbidden kill kills lung lungs nicotine no smoking prohibit quit smoke smokers smoking stop stop tobacco tobacco area conservation area environmental protection forest german germany integral nature reserve landscape nature nature protection area nature-sanctuary owl pictogram preserve area protected area reserve trees wooden sign