atlantic danger fluid horizon lane liquid marker norway ocean sea Sea lane sign sky tower warning water blue boat coast coastline hazard lighthouse norwegian promontory rock shore speedboat advice alert appropriate-behavior appropriate-behaviour be-careful beware care careful caution cliff cliffside colors colours communicate communication concern dangerous deterioration fading-sign fall falling information informing light lookout observant restricted restriction restrictions risk risks risky river riverside safety shadows shapes shrubs signs sunlight textures trees warning-sign watch watch-out attention falling rocks germany isolated mountains pictogram rock fall rock slide rockfall stones traffic announcement black cars cautious communicating conditions directions Look looking red road-conditions slippage slippery slow slow-down speed speed-reduction vehicles wet white yellow aged aging crossing elderly old pedestrians road-sign security seniors signage street-sign symbol traffic-flow walk walkers walking denied law legal no-standing not-allowed not-permitted penalties permission-denied prohibited prohibition refusal road road-safety road-side unacceptable verge block computer email firewall illegal inbox internet mail phish phishing screen theft unsafe web access denied no standing no temporary parking not allowed not permitted permission denied building decay haunted notices private prohibit property rules spooky trespass trespassing wall window blade cerated cut knife pocket protect protection sharp sveres tool tools weapon