The historical maps are in Adobe® Portable Document Format (PDF). In order to view these files, you will need Adobe® Reader®. The larger PDF files can be up to 10 MB in size and may take longer to download on computers with a slower Internet connection.
To obtain additional information about the historical maps, contact Mark Hansen at 515-239-1990 or email firstname.lastname@example.org.
Iowa registered highway routes, 1914-1925