Ключевые слова: allow, amber, architecture, background, beautiful, blue, branch, bulgaria, car, change, check, city, color, controler, cross, crossroad, drive, environment, green, information, lamp, light, ready, red, roof, safe, safety, semaphore, sign, signal, sky, sofia, space, stop, street, traffic light, trafficlight, transportation, travel, tree, urban, warning, way, winter, yellow,