ðɪs ɹˈaʊt wʌz dˈɛzɪɡnˌeɪɾᵻd ˌɔn ˈɔːɡəst twˈɛnti wˈʌn, nˈaɪntiːnhˈʌndɹɪd twˈɛnti θɹˈiː æz ðə ɹᵻnˈʌmbɚd ˌɛsˈeɪtʃ fˈaɪv ˈeɪ. ˌɔn sɛptˈɛmbɚ sˈɛvəntˌiːn, nˈaɪntiːnhˈʌndɹɪd twˈɛnti θɹˈiː, ðə sˈɛkʃən fɹʌm ˈɛstɪlˌaɪn tə tˈɜːki wʌz kˈænsəld, æz ˌɛsˈeɪtʃ ˈeɪtiːn ɛkstˈɛndᵻd nˈɔːɹθiːst fɹʌm tˈɜːki tə mˈɛmfɪs.
This route was designated on August 21, 1923 as the renumbered SH 5A. On September 17, 1923, the section from Estelline to Turkey was cancelled, as SH 18 extended northeast from Turkey to Memphis.