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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. (2013)
  • 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.

2014 Public Road Length - Miles by Ownership
Ownership
Miles
Iowa DOT
8,871*
Counties
89,818
Municipalities
15,037
Parks and institutions
622
Federal agencies
138
Total miles
114,486*
*Totals exclude ramps. The Iowa DOT maintains
9,403 miles of roadway, including 532 miles of ramps.


2014 Bridges - Number of Bridges
Ownership
Bridges
Iowa DOT 4,101
Counties 18,930
Municipalities 1,147
State parks 6
Local parks 3
Other state agencies 15
Private 1
Railroad 360
Local toll 1
Bureau of Indian Affairs 3
Bureau of Fish and Wildlife 5
National Park Service 2
Corps of Engineers 6
Army 18
Total 24,598

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