barricade barricades communicate flash flashing light lights orange street street sign warn warning white appropriate behavior appropriate behaviour black communicating communication directing direction directional directive give way indication indicator informing road sign rules safety sign traffic traffic flow cross crossing junction man pedestrian pedestrians road roadsign signs walk zebra car highlands narrow passing place scotland signpost single track vehicle winter advice alert announcement appropriate-behavior appropriate-behaviour be-careful beware care careful caution concern danger dangerous double-lines information island lookout observant reflective refuge risk risks risky road-sign security share sharing small-traffic-island traffic-flow traffic-island walkers walking warning-sign watch watch-out yellow animal dog groningen guard guard-dog pet shape vector dead end street end hidden its all over no way out over road rules sackgasse street yield sign the end traffic sign way avalanche beach cliffs cornwall England english falls Great Britain grunge grungy red rock sand stand barbeb barbed wire countryside fence fields hills keep out post private wire