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List of Interstate Highways in Iowa

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From Wikipedia, the free encyclopedia

"Iowa Interstate" redirects here. For the railroad, seeIowa Interstate Railroad.

A request that this article title be changed toList of interstate highways in Iowa isunder discussion. Pleasedo not move this article until the discussion is closed.

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
Iowa Primary Highway System Interstate US State Secondary Scenic

Interstate Highways in Iowa form a network offreeways that cross the U.S. state ofIowa as part of theInterstate Highway System.

Primary Interstates

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Number	Length (mi)^[2]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed
I-29	151.941	244.525	I-29 atHamburg	I-29 atSioux City	01958-10-011958	current
I-35	218.532	351.693	I-35 nearLamoni	I-35 nearAlbert Lea, Minn.	01958-09-211958	current
I-74	5.399	8.689	I-80 atDavenport	I-74 /US 6 atBettendorf	01968-08-301968	current
I-80	306.392	493.090	I-80 atCouncil Bluffs	I-80 atLeClaire	01958-09-211958	current

Primary Interstates
I-29 as viewed from theSergeant Floyd Monument
I-35 approaching exit 182
The Interstate 74 Bridge carrying I-74 across theMississippi River
I-80 in western Iowa nearWalnut
Traffic congestion on I‑35 / I‑80 during theIowa flood of 2008

Auxiliary Interstates

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Number	Length (mi)^[2]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
I-80N	17.102	27.523	I-29 atLoveland	I-80 nearNeola	01966-01-011966	01973-01-011973	Replaced by I-680; now I-880
I-129	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
I-235	14.585	23.472	I-35 /I-80 atWest Des Moines	I-35 / I-80 atDes Moines	01961-12-141961	current
I-280	9.862	15.871	I-80 /US 6 at Davenport	I-280 atRock Island, Ill.	01973-10-251973	current
I-380	72.969	117.432	I-80 /U.S. Route 218 /Iowa 27 nearCoralville	US 218 atWaterloo	01973-09-191973	current
I-480	0.877	1.411	I-480 /US 6 at Council Bluffs	I-29 /US 6 at Council Bluffs	01966-09-211966	current
I-680	3.353	5.396	I-680 atOmaha, Neb.	I-29 nearCrescent	01966-12-131966	current
I-880	17.102	27.523	I-29 atLoveland	I-80 nearNeola	02019-10-052019	current	Replaced a portion of I-680
Former

Auxiliary Interstates
I‑235 crossing theDes Moines River inDes Moines, Iowa
The Edna M. Griffin Memorial Bridge carrying I‑235 across the Des Moines River
The I‑480 bridge over theMissouri River betweenCouncil Bluffs, Iowa and DowntownOmaha, Nebraska
I‑280 crosses the Mississippi River over the Baker Bridge.

Business routes

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Number	Length (mi)^[2]	Length (km)	Southern or western terminus	Northern or eastern terminus	Cities	Formed	Removed
I-35 Business Loop	6.927	11.148	I-35 /US 30 inAmes	I-35 in Ames	Ames	01995-10-271995	current
I-35 Business Loop	2.979	4.794	I-35 /US 18 inClear Lake	I-35 / US 18 /Iowa 122 in Clear Lake	Clear Lake	01999-04-171999	current