ðə plˈænd ɛkstˈɛnʃən tə sˈændɚsən wʌz tɹænsfˈɜːd tə nˈuːli dˈɛzɪɡnˌeɪɾᵻd jˈuː.ˈɛs. hˈaɪweɪ tˈuːhˈʌndɹɪd ˈeɪɾi fˈaɪv kˈɑːsaɪnd sˈɪns nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi fˈaɪv ˌɔn sɛptˈɛmbɚ twˈɛnti sˈɪks, nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi nˈaɪn.
The planned extension to Sanderson was transferred to newly designated U.S. Highway 285 (cosigned since 1935) on September 26, 1939.