Ключевые слова: arch, ben, benjamin, big, blue, boat, bridge, building, cable, delaware, expressway, franklin, freeway, high, highway, landmark, large, mass, ocean, pa, pennsylvania, philadelphia, pylon, rail, railway, river, road, sea, ship, span, steel, support, suspension, toll, tower, traffic, train, transit, transport, transportation, urban, usa, vertical, water, way,