Ключевые слова: blue, care, circuit, city, concept, confident, control, cross, danger, defense, digital, direction, drive, electronic, equipment, green, guard, highway, inspect, isolated, lamp, light, observe, outdoors, prevention, protect, protection, race, road, rush, safe, safety, secure, security, semaphore, set, sign, signal, sky, stand, still, stop, street, surveillance, symbol, technology, town, traffic, traffic light, trafficlight, transit, transportation, travel, urban, warning,