Turning movement diagrams
The turning movement diagrams available on this page are in Adobe® Portable Document Format (PDF) accessed through a Google Earth™ KMZ file. In order to view these files, you must have the Adobe® Acrobat® Reader® and Google Earth™ applications. Click on the links to install them if necessary.
After downloading and opening the KMZ file, please note the turning movements are organized by year.
- Zoom in to the intersection you are seeking. The number in the colored hexagon symbol indicates the year that turning movement data is available.
- Click on the hexagon and a pop-up dialog will appear with summary information about the intersection. Some intersections may have multiple years of data and clicking on a hexagon will result in a symbol for each year that data is available.
- Click on the link at the bottom of the dialog window to view a PDF diagram of the intersection with turning movement data. New roadway and intersection relocations may cause dots for older turning movements to appear off the current location of the roadway. Google Earth's historical imagery tool may allow you to view the former alignment of the roadway.
To obtain additional traffic information or if you have questions regarding this data, call Ronald Bunting at 515-239-1323 or email firstname.lastname@example.org.
View the turning movement diagrams through our new online map interface
View the county and city traffic maps
View the state traffic maps
Help for printing PDF files