Interstate 37 is an intrastate interstate highway located within the state of Texas, United States. Its southern terminus is in Corpus Christi, Texas at United States Highway 181; its northern terminus is in San Antonio, Texas at Interstate 35, where the road turns into US 281, continuing to northern San Antonio as a major freeway.
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I-37 ends at the only place in the country where an interstate, US highway, and a state highway terminate simultaneously, in Corpus Christi, TX.
