 The first upgrades to US 11 occurred when Williamsport Pike and Middleburg Pike were rebuilt and widened in the late 1920s and early 1930s, respectively. Williamsport Pike was rebuilt again in 1948, with the highway widened using the right-of-way of the Williamsport – Hagerstown interurban that had ceased service in 1947. By 1950, US 11 in Hagerstown followed a one-way pair: the northbound direction followed Summit Avenue and Jonathan Street between Virginia Avenue and Pennsylvania Avenue and the southbound direction used Prospect Street through the downtown area. The first relief from long-distance traffic came to US 11 when the first section of I-81 was completed from US 40 to the Pennsylvania state line in 1958. Following the completion of I-81 from US 40 south to the Potomac River in 1966, US 11 became a highway mainly for local traffic. US 11's bridge across the Potomac River was rebuilt in 1979. In addition, the highway's name south of Hagerstown was changed from Williamsport Pike to Virginia Avenue around 1995.
