ˌɛmˈɛs nˈaɪn dˈʌbəljˌuː wʌz dˈɛzɪɡnˌeɪɾᵻd tə fˈɑːloʊ ɪts kˈɜːɹənt ɐlˈaɪnmənt ɪn nˈaɪntiːnhˈʌndɹɪd fˈɪfti sˈɪks ænd wʌz fˈʊli pˈeɪvd fɹʌm ɐ ɡɹˈævəl ɹˈoʊd baɪ nˈaɪntiːnhˈʌndɹɪd sˈɪksti.
MS 9W was designated to follow its current alignment in 1956 and was fully paved from a gravel road by 1960.