Ключевые слова: background, blue, circle, clouds, communication, concept, craft, creative, creativity, danger, design, go, go sign, green, halt, highway, horizontal, idea, isolated, label, learn, limit, notice, object, outdoor, post, road, road sign, safety, sign, sky, slow, space, speed, street, symbol, toy, traffic, transport, transportation, travel, trip, vintage, warning, white,