Iowa’s Interstate System - July 2005

I-35

From the Iowa-Missouri state line south of Lamoni, joining I-80 and skirting Des Moines on the west and north sides, north past Ankeny, Ames and Mason City, to the Iowa-Minnesota state line southeast of Albert Lea, Minnesota; joins the metropolitan centers of the upper Midwest-Kansas City, Des Moines and Minneapolis

I-74

From the Iowa-Illinois state line at Bettendorf and the Mississippi River, northeast of Davenport to I-80

I-80

From the Iowa-Nebraska state line northeasterly via Council Bluffs, Adair and West Des Moines, then easterly via Newton, Iowa City and the Davenport-Bettendorf area to the Iowa-Illinois state line; recognized as the Midwest connection between Omaha and Chicago

I-129

From a junction with I-29 south of Sioux City to the Iowa-Nebraska state line at the Missouri River en route to South Sioux City; the shortest Iowa interstate route

I-235

From a point on I-35 in West Des Moines (known as the west mixmaster) through the city of Des Moines, to another point on I-35 north of Des Moines (known as the northeast mixmaster)

I-280

From the Iowa-Illinois state line southwest of Davenport to a point on I-80 northwest of Davenport

I-380

From a junction with I-80 near Iowa City, via Cedar Rapids, to the junction with U.S. 20 in Waterloo

I-480

From the Iowa-Nebraska state line via Council Bluffs to a point on I-29 in Council Bluffs

I-680

Route consists of two sections:  first, from the Iowa-Nebraska state line north of Council Bluffs to a point on I-29; and second, from another point on I-29 south of Loveland to a point on

I-80 northeast of Neola