Ключевые слова: america, american, authority, bay, boston, car, city, commute, commuter, extension, gilman, glx, green, kinki, landmark, light, line, locomotive, ma, massachusetts, mbta, metro, passenger, public, rail, railroad, railway, sharyo, somerville, square, states, station, street, streetcar, subway, tour, tourism, traffic, train, tram, tramway, transit, transport, transportation, travel, trolley, united, urban, usa, vehicle,