wˌɛn nᵻvˈædə əfˈɪʃəlz bɪɡˈæn ðə pɹˈɑːsɛs ʌv ɹᵻnˈʌmbɚɹɪŋ ðə stˈeɪtz hˈaɪweɪz ɪn nˈaɪntiːnhˈʌndɹɪd sˈɛvənti sˈɪks, ˌɛsˈɑːɹ wˈʌnhˈʌndɹɪd fˈoːɹɾi wʌz plˈænd təbi ɹˌiːdˈɛzɪɡnˌeɪɾᵻd æz stˈeɪt ɹˈaʊt tˈuːhˈʌndɹɪd nˈaɪnti wˈʌn.
When Nevada officials began the process of renumbering the state's highways in 1976, SR 140 was planned to be redesignated as State Route 291.