Ключевые слова: asphalt, black, bump, bumpy, caution, color, danger, direction, drop, empty, gray, ground, hazard, hump, image, lights, limit, line, motion, nobody, norrland, outdoors, parking, peter ekvall, protection, risk, road, roadway, rubber, safety, sign, speed, stop, street, strip, stripe, striped, surface, sweden, symbol, tarmac, texture, traffic, transport, transportation, umea, urban, vertical, warning, yellow,