Ключевые слова: ballast, bolt, brown, cargo, change, concrete, construction, direction, equipment, factory, gray, industry, infrastructure, iron, landscape, line, made, material, metal, new, outdoor, parallel, pattern, perspective, pile, produce, production, rail, railroad, railway, road, rust, rusty, screw, sleeper, sleepers, stack, station, steel, stone, store, straight, track, train, transport, transportation, travel, way, wheel, work,