Ключевые слова: accident, asia, asian, background, billboard, black, board, car, cctv, city, control, danger, detection, digital, display, electronic, equipment, expect, helmet, info, information, led, light, message, money, outdoor, panel, post, protect, protection, red, road, safe, safety, security, sign, signal, sky, skyline, speed, street, summer, surveillance, system, technology, traffic, transport, transportation, vehicle, warning,