List of Interstate Highways in Iowa
Interstate Highways in Iowa form a network of freeways that cross the state.
Interstate Highways of the Iowa Primary Highway System | |
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![]() ![]() ![]() Highway markers for I-80, I-380, and I-35 Bus. Loop | |
System information | |
Formed | August 14, 1957[1] |
Highway names | |
Interstates | Interstate X (I-X) |
Business Loops: | Interstate X Business (I-X Bus.) |
System links | |
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System map
Primary Interstates
Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed |
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151.826 | 244.340 | I-29 at Hamburg | I-29 at Sioux City | 1958 | current |
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218.432 | 351.532 | I-35 near Lamoni | I-35 near Albert Lea, Minn. | 1958 | current |
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5.386 | 8.668 | I-80 at Davenport | I-74 / US 6 at Bettendorf | 1968 | current |
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306.268 | 492.891 | I-80 at Council Bluffs | I-80 at LeClaire | 1958 | current |
- Primary Interstates
- I-29 crossing over the mouth of the Floyd River
- I-35 approaching exit 182
- Exit 68 to Iowa Highway 5 on I-35 south of West Des Moines
- The Interstate 74 Bridge carrying I-74 across the Mississippi River
- I-80 in western Iowa near Walnut
Auxiliary Interstates
Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
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16.565 | 26.659 | I-29 at Loveland | I-80 near Neola | 1966 | 1973 | Became I-880 | |
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0.286 | 0.460 | I-129 / US 20 / US 75 at Sioux City | I-29 / US 20 / US 75 at Sioux City | 1976 | current | ||
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13.816 | 22.235 | I-35 / I-80 at West Des Moines | I-35 / I-80 at Des Moines | 1961 | current | ||
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9.581 | 15.419 | I-80 / US 6 at Davenport | I-280 at Rock Island, Ill. | 1973 | current | ||
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73.080 | 117.611 | I-80 / U.S. Route 218 / Iowa 27 near Coralville | US 218 at Waterloo | 1973 | current | ||
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0.721 | 1.160 | I-480 / US 6 at Council Bluffs | I-29 / US 6 at Council Bluffs | 1966 | current | ||
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3.169 | 5.100 | I-680 at Omaha, Neb. | I-29 near Crescent | 1966 | current | ||
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16.565 | 26.659 | I-29 at Loveland | I-80 near Neola | 2019 | current | Replaced I-80N | |
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- 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) | Length (km) | Southern or western terminus | Northern or eastern terminus | Cities | Formed | Removed |
---|---|---|---|---|---|---|---|
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— | — | I-35 / US 30 in Ames | I-35 in Ames | Ames | — | — |
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— | — | I-35 / US 18 in Clear Lake | I-35 / US 18 / Iowa 122 in Clear Lake | Clear Lake | — | — |
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References
- Official Route Numbering for the National System of Interstate and Defense Highways (Map). American Association of State Highway Officials. August 14, 1957.
External links
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Wikimedia Commons has media related to Interstate Highways in Iowa. |
- The Iowa Highways Page by Jason Hancock
- Interstate Guide
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