acceptable advice advising allocated allocation appropriate-behavior appropriate-behaviour approved blue communicating communication directing direction directional indication indicator letter lettering off-road parking parking-bay public pullover roadside sign signs symbol symbols arrow green information informing white word wording arid bare barren bay china compound desert dry dune empty gazebo hut lot park sand shade stand Tengger tracks arch architecture architecture styles bays bow cars classic decoration decorative glasgow idyllic scotland street scenery streets tranquil windows gray grey parallel