Ключевые слова: alarm, alert, ambulance, attention, beacon, border, bulb, cargo, color, colorful, danger, emergency, end, equipment, flasher, freight, icon, illustration, industrial, industry, isolated, light, limit, locomotive, medical, old, pattern, police, rail, railroad, railway, random, seamless, security, set, sign, station, stop, track, traffic, train, transport, transportation, urgency, wagon, wooden,