Illinois Route 66 References

           Bates Experimental Road - Illinois Highway Department - 1922

           ASCE Transactions 1924 - Highway Research in Illinois - Clifford Older, Chief Highway Engineer

           Illinois Route 66 Corridor Management Plan Illinois Route 66 Heritage Project

           The Rational Planning by a State of a Public Highway System - Frank T. Sheets, Chief Highway Engineer - FHA Part 2 of 7

           Surface Oiling of Earth Roads - B.H. Piepmeier, Maintenance Engineer, Illinois State Highway Department, 1915

           Manual On Road Construction - B.H. Piepmeier, Engineer of Construction, Illinois Division of Highways, 1921

           Highway Officials of Illinois in 1917 - Illinois Highway Improvement Association

           Brick Paved Segments of Route 66 - The Route 66.com

           Illinois Highway Improvement Bluebook 1919 - Illinois Highway Improvement Association

           Historic Drawbridges on Route 66 - (Various authors)

           Route 66 in Madison County - By Cheryl Eichar Jett

           Database of Historic Bridges in Illinois - By Jim Ross