nˈoʊ pˈɑːɹt ʌv lˈɛdʒɪslətˌɪv ɹˈaʊt fˈoːɹɾi sˈɪks wʌz ɐsˈaɪnd ɐ pˈoʊstᵻd dˌɛzɪɡnˈeɪʃən wɛn ðə fˈɜːst sˈɛt ʌv pˈoʊstᵻd ɹˈaʊts ɪn nˈuː jˈɔːɹk wɜːɹ ɐsˈaɪnd ɪn nˈaɪntiːnhˈʌndɹɪd twˈɛnti fˈoːɹ; haʊˈɛvɚ, ðɪ ɛntˈaɪɚ ɹˈaʊt ɹᵻsˈiːvd ɐ nˈʌmbɚɹ æz pˈɑːɹt ʌvðə nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi ɹᵻnˈʌmbɚɹɪŋ ʌv stˈeɪt hˈaɪweɪz ɪn nˈuː jˈɔːɹk.
No part of legislative Route 46 was assigned a posted designation when the first set of posted routes in New York were assigned in 1924; however, the entire route received a number as part of the 1930 renumbering of state highways in New York.