Office of Planning and Programming (2011). 2011 Average Daily Total Traffic(PDF) (Map). Scale not given. Illinois Department of Transportation. Archived from the original(PDF) on July 21, 2011. Retrieved December 30, 2013.
Office of Planning and Programming (2011). 2011 Average Daily Total Traffic(PDF) (Map). Scale not given. Illinois Department of Transportation. Archived from the original(PDF) on July 21, 2011. Retrieved December 30, 2013.