advice alert appropriate behavior appropriate behaviour black blue care chinese colors colours concern danger dangerous directions emergencies emergency english languages protect protection rain rain-drops safety sign signs slip slippery slippery floor slippery surface slipping warning warning sign wet wet surface white yellow avoid denied not allowed not permitted permission denied polluted pollution prohibited prohibition red rules toxic toxicity water pollution water toxicity weathered worn crossroads junction minor road roadsign roadsigns side side-road sideways announcement appropriate-behavior appropriate-behaviour be-careful beware careful caution children communicating communication informing kids Look looking lookout observant risk risks slow slow-down slower warning-sign watch watch-out bricks death fork omen pitchfork. hay shadow wall access-denied access-limitations authorise authorised authority building electricity electricity-supply exceptions limitations limited limited-entry not-allowed not-permitted power power-supply regulations responsible restricted restrictions traffic vehicles cars monitored monitoring noted observed site-regulations speed advising behave behavior behaviour communicate illegal information legal-matters lettering no-tree-cutting no-wood-collecting offence prohibitation prosecution restriction signage timber unauthorised unauthorized wood 70 car post