Ключевые слова: alertness, arranging, authority, backgrounds, black, blue, car, change, city, cloud, colors, control, crossing, electric, entering, equipment, forward, horizontal, illuminated, industrial, life, light, lighting, natural, no, objects, protection, recycling, red, render, road, safety, sign, single, sky, space, stop, stoplight, street, symbol, technology, traffic, transportation, travel, warning, way, yes,