US 301 replaced US 17 - 1 in the early 1930s .
US 301 was extended from Petersburg north along its current course into Maryland when the Potomac River Bridge was completed in 1940 .
US 301 replaced US 17 - 1 in the early 1930s and was extended from Petersburg north along its current course into Maryland when the Potomac River Bridge was completed in 1940 .