High Quality Content by WIKIPEDIA articles! U.S. Route 80 is an east–west United States highway, much of which was once part of the early auto trail known as the Dixie Overland Highway. As the "0" in the route number indicates, it was originally a cross-country route, from the Atlantic to the Pacific. However, the entire segment west of Dallas, Texas, has been decommissioned in favor of various Interstate highways and state highways. Currently, the highway`s eastern terminus is in Tybee Island, Georgia, at the Atlantic Ocean. Its western terminus is at the border of Dallas and Mesquite, Texas, at an intersection with Interstate 30.