Roads, Streets and Bridges

2008 Public Road Length - Miles by Ownership
Ownership	Miles
Iowa DOT	8,894*
Counties	89,957
Municipalities	14,702
Parks and institutions	549
Federal agencies	123
Total miles	114,225*

*Totals exclude ramps. The Iowa DOT maintains
9,404 miles of roadway, including 510 miles of ramps.

2008 Bridges - Number of Bridges
Ownership	Bridges
Iowa DOT	4,053
Counties	19,300
Municipalities	1,073
State parks	3
Local parks	1
Other state agencies	19
Private	4
Railroad	80
Local toll	3
Bureau of Indian Affairs	1
National Park Service	2
Corps of Engineers	2
Unknown	57
Total	24,598

• There are more public road miles in Iowa than interstate miles in the entire 50 states.
• Iowa ranks 13th in the nation in number of miles of roadway. (2007) 
• There are approximately 39 miles of road for every 1,000 people in Iowa.
• There are 2,664 bridge structures in Iowa that are made primarily of wood.