Ключевые слова: airport, airport safety, airport security, alert, apron, asphalt, attention, aviation, background, barrier, boundary, caution, cone, construction, danger, divert, equipment, forbidden, hazard, highway, limit, lines, marking, object, orange, protection, red, repair, road, road cone, road traffic cone, safe, safety, security, sign, signal, stop, street, streetcone, stripe, striped, symbol, traffic, traffic cone, training, transport, transportation, warning, white, work,