Ключевые слова: america, american, antique, building, cable, cablecar, car, center, city, downtown, green, historic, historical, history, landmark, line, lowell, ma, massachusetts, museum, national, new, old, open, park, passenger, rail, railway, retro, route, service, states, street, streetcar, tour, tourism, tourist, traffic, train, tram, tramway, transit, transport, transportation, travel, trolley, united, usa, vehicle, vintage,