Ключевые слова: absence, accident, advice, asphalt, backgrounds, bitumen, black, care, chance, city, concrete, construction frame, danger, day, decelerate, driving, fifty fifty, flat, highway, km, maximum, miles, multiple lane highway, no people, number, on the move, pattern, protection, reduce, reduction, safety, sign, slow, slower, speed, speed limit sign, street, traffic, transportation, urban scene, warning sign, warning symbol, white, zero,