banner

Roads, streets and bridges

  • There are more public road miles in Iowa than interstate miles in the entire 50 states.
  • Iowa ranks 14th in the nation in number of miles of roadway. (2009)
  • There are approximately 38 miles of road for every 1,000 people in Iowa.
  • There are 2,664 bridge structures in Iowa that are made primarily of wood.

2011 Public Road Length - Miles by Ownership
Ownership
Miles
Iowa DOT
8,892*
Counties
89,835
Municipalities
14,953
Parks and institutions
620
Federal agencies
138
Total miles
114,320*
*Totals exclude ramps. The Iowa DOT maintains
9,387 miles of roadway, including 528 miles of ramps.


2012 Bridges - Number of Bridges
Ownership
Bridges
Iowa DOT 4,097
Counties 19,114
Municipalities 1,124
State parks 4
Local parks 3
Other state agencies 18
Private 2
Railroad 363
Local toll 1
Bureau of Indian Affairs 3
Bureau of Fish and Wildlife 5
National Park Service 2
Corps of Engineers 6
Army 18
Unknown 0
Total 24,760

Bridge Rating Definitions
Primary Highway System - Age of Bridges by Decade
Primary Highway System Condition of Bridges
Primary Highway System and Interstate System Condition of Bridges
Primary Highway System Pavement Condition