Ключевые слова: accident, alert, background, break, breakdown, bright, car, catching, color, concept, construction, emergency, emphatic, failure, geometric, hazard, hazardous, isolated, isosceles, nobody, notice, precaution, problem, red, reflector, rendered, road, safety, security, sign, signal, site, symbol, traffic, transportation, travel, triangle, triangular, urgency, vehicle, vibrant, warning, watchful, web, white,