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List of state highways in Iowa

alt1=Primary Road 6 route markeralt2=1926 Iowa 16 route markeralt3=1961 Iowa 136 route marker route markeralt4=Iowa 330 route marker
Highway markers from different years
Highway names
Interstates: Interstate nn (I-nn)
US Highways: U.S. Highway nn (US nn)
State: Iowa nn
System links

State highways in the U.S. state of Iowa are owned and maintained by the Iowa Department of Transportation.


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