blue brown car caution open opportunity purse seat theft. risk unsecured advice alert announcement appropriate-behavior appropriate-behaviour be-careful beware black care communicating communication concern consumption danger dangerous faucet health informing listen Look looking lookout protect protection red risk risks risky rules safety sign signs tap undrinkable unhealthy warning warning-sign water white careful directions observant rail railway railway-station railway-tracks trains watch watch-out go green light lights pedestrian pedestrians trams authorisation authorised authorization avoid flammable gas gaseous no-ignition outlet potential stay-clear vapour vapours warned conditions garden garden-beds keep-out not-allowed not-permitted planter-beds prohibited prohibition watch-your-step electric electrical electrician electricity energy hazard high power security signal bait baits destruction elimination foxes information poison poisonous toxic toxicity toxins access-denied denied eroded erosion hillside no-access permission-denied Soil subsidence weathered banned cars rain rain-drops wet direction footpath pathway walk walkers walking yellow