texas77U.S. Route 77 (US 77) is a major north–south United States Numbered Hhway which extends for 1,305 miles (2,100 km) in the central United States.As of 2005, Its southern terminus is inU.S. Route 77 (US 77) is a major hhway that is part of the United States Numbered Hhway System that runs from the Veterans International Bridge in Brownsville to Sioux City, Iowa.In