historical major road markings mother road road road sign route 66 tarmac traffic travel usa 90 ahead blue limit limits major pole post red sign signpost signs sky speed speedlimit steel yellow autobahn automobile carriageway cars dual interstate lanes lorry main motorway route truck trunk bridge interchange intersection junction overpass ramps slip Friarton arab arabic cutout isolated roadsign roadsigns warning appearance Australia background bush central-Australia crossing driver freight freighter-trailer hazard hazardous lampposts large lights long movement moving outback rail road-train scene self-tracking-trailers supplies three-trailer trailers transport transportation triple trucking vehicle view views warning-lights angles appearances buildings city colorful colourful concrete contemporary contrast contrasting covered walkways decorative design distinctive elements exterior external foliage garden green greenery light linear lines low modern paved paving peace peaceful perspectives plants quality shapes shrubbery shrubs Sizes structures style styles sunlight supports tiled trees variety walkways along bare below conditions construction development direction empty empty of traffic highway highways lamp-posts landscape left-hand driving lined looking down main road no motor cars no motor vehicles no vehicles road rules roadwork roadworks stop stopped suburban suburbs traffic flow traffic lanes wide wide road