Ключевые слова: abstract, arrow, asphalt, background, barrier, beware, black, blank, careful, competition, concrete, construction, corner, development, dirty, equipment, graphic, ground, horizontal, hump, industrial, mark, material, old, outdoors, paint, race, risk, road, roadside, scene, shape, side, sign, site, space, speed, stop, street, striped, surface, texture, track, traffic, wall, wallpaper, warning, white, work, yellow,