When the [[U.S. Highway System]] was created in 1926, what is now DE&nbsp;202 was designated as the southernmost part of [[U.S. Route 122 in Delaware|US&nbsp;122]], a U.S. highway that ran from [[U.S. Route 13 in Delaware|US&nbsp;13]] in Wilmington north to [[New Jersey]].<ref name="USHM">{{cite map |author1= [[Bureau of Public Roads]] |author2= [[American Association of State Highway Officials]] |date= November 11, 1926 |title= United States System of Highways Adopted for Uniform Marking by the American Association of State Highway Officials |url= https://commons.wikimedia.org/wiki/File:United_States_System_of_Highways_Adopted_for_Uniform_Marking_by_the_American_Association_of_State_Highway_Officials.jpg |scale= 1:7,000,000 |location= Washington, DC |publisher= [[United States Geological Survey]] |oclc= 32889555 |access-date= November 7, 2013 |via= [[Wikimedia Commons]] |name-list-style= amp}}</ref><ref name="DE 1931 map">{{Delaware road map|year=1931|access-date=November 24, 2015}}</ref> By the mid-1930s, the US&nbsp;122 designation was replaced with US&nbsp;202, and the route was shifted to head southwest from Concord Avenue and continue into downtown Wilmington on WashingtonBaynard Boulevard.<ref name="DE 1936 map">{{Delaware road map|year=1936|access-date=November 24, 2015}}</ref> By 1959, US&nbsp;202 was moved onto a [[one-way pair]] through downtown Wilmington, with the southbound direction splitting from Concord Avenue to follow Baynard Boulevard to Washington Street and the northbound direction turning onto Concord Avenue at Market Street (US&nbsp;13).<ref name="DE 1959 map">{{Delaware road map|year=1959|access-date=November 24, 2015}}</ref> In 1970, the southern terminus of US&nbsp;202 was cut back to the I-95 interchange, leaving Concord Avenue unnumbered.<ref name=aasho1970>{{AASHTO minutes |year=1970A |page=397 |access-date=October 15, 2014 |link= |quote=}}</ref><ref name="DE 1971 map">{{Delaware road map|year=1971|access-date=November 24, 2015}}</ref> DE&nbsp;202 was designated along Concord Avenue between US&nbsp;13 Bus. and I-95/US&nbsp;202 by 1981.<ref name="DE 1981 map">{{Delaware road map|year=1981|access-date=November 24, 2015}}</ref>