danger dangerous death electricity electrocute electrocution fence hazard keep out metal railings sign substation transformer warn warning yellow against circle letter mail mails many pictogram prohibition protest red road roadsign signs spam spammed stop beverage beware black cup drink hot pot round steam suppression symbol warm white access-denied advice advising alert apology appropriate-behavior appropriate-behaviour avoid behavior behaviour care caution communicate communication concern construction construction-site entry-denied entry-prohibited inconvenience inconvenient information informing no-access no-entry not-allowed not-permitted permission-denied prohibited restricted restriction restrictions risk risks risky safety warning-sign cars clearway denied directions keep-clear law legal no-parking no-standing no-temporary-parking refusal road-safety road-side unacceptable vehicles announcement be-careful careful cautious communicating conditions Look looking lookout observant road-conditions road-risks rural slippage slippery slow slow-down speed speed-reduction tractor tractors traffic watch watch-out parking deep health polluted pollution protect protection rules toxic toxicity unhealthy water water-pollution water-toxicity weathered alarm background copy copyspace electric electrical notice space textures wall wood