Ключевые слова: alert, arrow, asphalt, attention, background, barrier, beware, blue, building, caution, color, communication, concept, construction, danger, design, direction, exclamation, hazard, icon, industry, information, mark, pictogram, red, repair, road, safety, security, sign, signage, signal, slow, stop, street, symbol, traffic, transit, transport, transportation, travel, triangle, trip, under, vintage, warn, warning, white, work, yellow,