List of Interstate Highways in Iowa
Interstate Highways of the Iowa Primary Highway System | |
---|---|
![]() ![]() ![]() Highway markers for I-80, I-380, and I-35 Bus. Loop | |
![]() Interstate Highways in Iowa highlighted in red | |
System information | |
Formed | August 14, 1957[1] |
Highway names | |
Interstates | Interstate X (I-X) |
Business Loops: | Interstate X Business (I-X Bus.) |
System links | |
Interstate Highways in Iowa form a network of freeways that cross the U.S. state of Iowa as part of the Interstate Highway System.
Primary Interstates
Number | Length (mi)[2] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | ||
---|---|---|---|---|---|---|---|---|
![]() | 151.941 | 244.525 | I-29 at Hamburg | I-29 at Sioux City | 01958-10-011958 | current | ||
![]() | 218.532 | 351.693 | I-35 near Lamoni | I-35 near Albert Lea, Minn. | 01958-09-211958 | current | ||
![]() | 5.399 | 8.689 | I-80 at Davenport | I-74 / US 6 at Bettendorf | 01968-08-301968 | current | ||
![]() | 306.392 | 493.090 | I-80 at Council Bluffs | I-80 at LeClaire | 01958-09-211958 | current | ||
- Primary Interstates
- I-29 as viewed from the Sergeant Floyd Monument
- I-35 approaching exit 182
- The Interstate 74 Bridge carrying I-74 across the Mississippi River
- I-80 in western Iowa near Walnut
- Traffic congestion on I‑35 / I‑80 during the Iowa flood of 2008
Auxiliary Interstates
Number | Length (mi)[2] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
---|---|---|---|---|---|---|---|---|
![]() | 17.102 | 27.523 | I-29 at Loveland | I-80 near Neola | 01966-01-011966 | 01973-01-011973 | Replaced by I-680; now I-880 | |
![]() | 0.286 | 0.460 | I-129 / US 20 / US 75 at Sioux City | I-29 / US 20 / US 75 at Sioux City | 01976-11-221976 | current | ||
![]() | 14.585 | 23.472 | I-35 / I-80 at West Des Moines | I-35 / I-80 at Des Moines | 01961-12-141961 | current | ||
![]() | 9.862 | 15.871 | I-80 / US 6 at Davenport | I-280 at Rock Island, Ill. | 01973-10-251973 | current | ||
![]() | 72.969 | 117.432 | I-80 / U.S. Route 218 / Iowa 27 near Coralville | US 218 at Waterloo | 01973-09-191973 | current | ||
![]() | 0.877 | 1.411 | I-480 / US 6 at Council Bluffs | I-29 / US 6 at Council Bluffs | 01966-09-211966 | current | ||
![]() | 3.353 | 5.396 | I-680 at Omaha, Neb. | I-29 near Crescent | 01966-12-131966 | current | ||
![]() | 17.102 | 27.523 | I-29 at Loveland | I-80 near Neola | 02019-10-052019 | current | Replaced a portion of I-680 | |
|
- Auxiliary Interstates
- I‑235 crossing the Des Moines River in Des Moines, Iowa
- The Edna M. Griffin Memorial Bridge carrying I‑235 across the Des Moines River
-
- I‑280 crosses the Mississippi River over the Baker Bridge.
Business routes
Number | Length (mi)[2] | Length (km) | Southern or western terminus | Northern or eastern terminus | Cities | Formed | Removed | |
---|---|---|---|---|---|---|---|---|
![]() | 6.927 | 11.148 | I-35 / US 30 in Ames | I-35 in Ames | Ames | 01995-10-271995 | current | |
![]() | 2.979 | 4.794 | I-35 / US 18 in Clear Lake | I-35 / US 18 / Iowa 122 in Clear Lake | Clear Lake | 01999-04-171999 | current | |
References
- ^ Official Route Numbering for the National System of Interstate and Defense Highways (Map). American Association of State Highway Officials. August 14, 1957.
- ^ a b c "Road Network (Portal)" (ESRI shapefile). Ames: Iowa Department of Transportation. April 9, 2021. Retrieved April 19, 2021.
External links
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- The Iowa Highways Page by Jason Hancock
- Interstate Guide