US 1 was rebuilt, and originally there were plans to upgrade US 1 to Interstate 595 (I-595) southward to the connector road with Ronald Reagan Washington National Airport. However, the upgrade as proposed was never built. Instead, US 1 is elevated with a diamond interchange over 15th Street South but is a surface road with signaled intersections at 20th Street South and further south. The modern US 1 corridor was added to the state highway system as follows: Major intersections See also Spurs of US 1 in Virginia US 301 The 1925 plan for US 301 became part of US 17 in 1926. US 401 (now part of US 58) The 1925 plan for US 401 became part of US 15 in 1926. US 501 Spurs of SR 31 between 1923 and 1928 SR 311, Ashland east and north to Corbin, now SR 54 and SR 2 SR 312, Gum Tree west, north, and northeast to Four Mile Fork, now SR 738 and part of SR 208 SR 313, Chimney Corner west to Chesterfield, now SR 145 SR 314, South Hill northeast toward McKenney, now US 1; later a short spur south to Mount Vernon, now part of SR 235 SR 316, Chester east toward Hopewell, now part of SR 10 References External links 01 1 Virginia U.S. Route 001 U.S. Route 001 U.S. Route 001 U.S. Route 001 U.S. Route 001 U.S. Route 001 U.S. Route 001 U.S. Route 001 U.S. Route 001 U.S. Route 001 U.S. Route 001 U.S. Route 001 U.S. Route 001 U.S. Route 001 U.S. Route 001 U.S. Route 001 U.S. Route 001