Ключевые слова: ahead, american, arrow, background, bus, car, caution, concept, danger, design, direction, drive, element, graphic, highway, icon, illustration, information, isolated, lane, light, limit, pedestrian, road, roundabout, safety, set, sign, signal, silhouette, slow, speed, stop, street, symbol, template, traffic, transportation, triangle, truck, turn, usa, vehicle, warning, way, white, yellow, yield, zone,