Ключевые слова: allow, approve, change, changing, city life, color, concept, control, controller, copy, copy space, direction, electronic, equipment, go, green, guidance, illuminated, information, lamp, light, lighting, lighting equipment, permit, ready, regulate, regulation, right, road, road sign, roadsign, safety, semaphore, sign, signal, sky, sky background, space, start, stoplight, symbol, technology, text, traffic, traffic light, transport, transportation, urban, warning,