Near the Tennessee border in the City of Bristol, the Piedmont Avenue Boundary Increase enlarges the previously-listed Bristol Commercial Historic District by adding two blocks of Piedmont Avenue north of State Street. Bristol arose as a railroad town, but Piedmont Avenue marks the arrival of the automobile era to the city and reflects the surge in popularity of the auto and auto-centric lifestyle from 1930 through the 1950s. The boundary increase incorporates ten buildings including a former Streamline Moderne-style Greyhound Bus Station (1938), an Art Deco-influenced Bristol Masonic Temple (1931), a Neo-Classical-style U.S. Post Office (1933) of brick and limestone construction, and a Moderne-inspired Firestone tire and auto service building (1936). The district also boasts two early 1930s single-story Commercial-style buildings that housed various shops and hardware and department stores.