The next major upgrade to US 13 was the construction of the limited-access Salisbury Bypass beginning from the northern end around 1973. The Salisbury Bypass was completed south to MD 12, including the interchange with US 50, in 1975. The US 13 portion of the bypass was completed in 1981; US 13 Bus. was assigned to the bypassed highway through Fruitland and Salisbury by 1983. The interchange at the northern end of US 13's part of the Salisbury Bypass had several ramps added during the extension of the bypass west to US 50 between 2000 and 2002, which was completed on October 19, 2002, six months before it was originally planned to open. The extension of the bypass resulted in US 50 running concurrent with US 13 to the northeast of the city. This concurrent section features separate mile markers for both US 13 and US 50, with shields on the mile markers to differentiate between the two routes.