In Delaware, the DuPont Highway was widened to with the addition of concrete shoulders from Selbyville to Georgetown in 1930 and from Georgetown to Milford in 1931. In 1931, the highway department identified the need to expand the highway to from Milford to Dover, and this widening was completed in 1933. In 1930, Governors Avenue was reconstructed as a concrete road and extended to become the new route of US 13 through Dover. US 113 was then extended north along State Street to a new terminus at the junction of State Street and Governors Avenue on the south side of Silver Lake.