Ключевые слова: america, american, authority, ball, bay, boston, card, cash, city, commute, commuter, extension, fare, glx, green, landmark, light, line, ma, machine, massachusetts, mbta, medford, metro, money, old, passenger, price, rail, railroad, railway, receipt, somerville, square, states, station, subway, ticket, tour, traffic, train, tram, transit, transport, transportation, travel, united, urban, usa, vending,