 The Wilmington and Great Valley Turnpike Company was chartered on January 23 , 1811 to build a turnpike running north from Wilmington along the Concord road , continuing to West Chester and Great Valley in Pennsylvania . Construction on the turnpike progressed throughout the 1810s . The Wilmington and Great Valley Turnpike was known in Delaware as the Concord Pike . The Concord Pike was taken over by New Castle County in 1911 , at which point the tolls were removed . A portion of the Concord Pike near Talleyville was incorporated into the state highway system by 1920 , with the remainder of the road proposed to become a state highway . By 1924 , the Concord Pike between Blue Ball and Talleyville was a state highway , with the remainder remaining a county road . A year later , what is now US 202 along Basin Road was completed as a state highway . When the US Highway System was established in 1926 , US 122 was designated to follow the Concord Pike between US 13 ( Philadelphia Pike ) in Wilmington and the Pennsylvania border , heading north into that state and continuing to US 22 at Whitehouse , New Jersey . On July 1 , 1935 , the portion of the route between Talleyville and the Pennsylvania border was taken over by the state . 
