 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.
