The National Road was to span from Maryland to the Mississippi River, but never made it—in part due to a political battle over the location of the new Illinois state capital in the 1830s.
"America’s First Interstate—The National Road and its Reach Toward St. Clair County, Illinois,"
The Confluence (2009-2020): Vol. 1
, Article 2.
Available at: https://digitalcommons.lindenwood.edu/confluence_2009/vol1/iss2/2