Ключевые слова: american, car, caution, conveyance, copyspace, crossing, curve, danger, diesel, engine, fast, freight, gate, highway, industry, infrastructure, junction, lifestyle, locomotive, motion, motor, public, rail, railroad, railway, road, rural, safety, shipping, sign, signal, speed, street, track, traffic, train, train crossing, transport, transportation, travel, usa, velocity, warning,