ʌntˈɪl sɛptˈɛmbɚ nˈaɪntiːnhˈʌndɹɪd sˈɛvənti tˈuː, sˌʌm tɹˈeɪnz tˈɜːmᵻnˌeɪɾᵻd æɾ ˈoːɹiənt hˈaɪts ɹˈæðɚ ðɐn tə pɹəvˈaɪd mˈoːɹ fɹˈiːkwənt sˈɜːvɪs ɔnðɪ ˈɪnɚ pˈɑːɹt ʌvðə lˈaɪn.
Until September 1972, some trains terminated at Orient Heights rather than  to provide more frequent service on the inner part of the line.