ɪn nˈaɪntiːnhˈʌndɹɪd sˈɪksti wˈʌn, hˈaɪweɪ twˈɛnti fˈoːɹ wʌz ɛkstˈɛndᵻd ɐlˈɔŋ wʌt wʌz pɹˈiːviəsli stˈeɪt hˈaɪweɪ tˈuːhˈʌndɹɪd fˈoːɹɾi fɹʌm ˈænəndˌeɪl əkɹˌɑːs ðə mˌɪsɪsˈɪpi ɹˈɪvɚ tə klˈɪɹ lˈeɪk, ˌoʊvɚlˈæpɪŋ wɪð hˈaɪweɪz fˈɪftiːn ænd fˈɪfti fˈaɪv tə kənˈɛkt tʊ ɪts ɚɹˈɪdʒɪnəl ɛkstˈɛnt.
In 1961, Highway 24 was extended along what was previously State Highway 240 from Annandale across the Mississippi River to Clear Lake, overlapping with Highways 15 and 55 to connect to its original extent.