Interstate highways in Iowa
29
35
74
80
129
235
280
380
480
680
For an explanation of the route listings, click here.

Interstate 80
Length in Iowa: 307 miles/494 kilometers
Western terminus: Nebraska state line (Missouri River) at Council Bluffs
Eastern terminus: Illinois state line (Mississippi River) at Le Claire
Entrance photos

Counties: Pottawattamie, Cass, Adair, Madison, Dallas, Polk, Jasper, Poweshiek, Iowa, Johnson, Cedar, Scott
Cities along route: Council Bluffs, Underwood, Neola, Minden, Shelby, Avoca, Walnut, Adair, Casey, Menlo, Stuart, Dexter, Earlham, De Soto, Van Meter, West Des Moines, Clive, Grimes, Urbandale, Johnston, Des Moines, Altoona, Bondurant, Mitchellville, Colfax, Newton, Kellogg, Oakland Acres, Grinnell, Malcom, Brooklyn, Guernsey, Victor, Williamsburg, Oxford, Tiffin, Coralville, Iowa City, West Branch, Durant, Walcott, Davenport, Eldridge, Bettendorf, Le Claire

Exit lists:
  • From Exit #1 to Exit #123 (I-35/235)
  • From Exit #123 to Exit #138 (multiplex with I-35)
  • From Exit #138 to Exit #239 (I-380/US 218)
  • From Exit #239 eastward into Illinois

  • Multiplexes:
  • 7 miles with US 6, from Exit #1A to Exit #8; this includes a 2½-mile triplex with I-29, between exits #1A and #4 through Council Bluffs
  • 50 miles with US 6 (again), from Exit #60 in Cass County to Exit #110 in Dallas County
  • 14 miles with I-35, from Exit #123 in West Des Moines to Exit #138 north of Des Moines. (In both Interstate multiplexes, I-80's exit numbers are used.)
  • 1½ miles with US 65, between exits #141 and #142 in Altoona
  • 22 miles with US 6 (yet again), from Exit #142 in Altoona to Exit #164 near Newton
  • 4 miles with IA 38, from Exit #267 to Exit #271 in Cedar County
  • 19 more miles with US 6, from Exit #271 north of Wilton to Exit #290 in Davenport
  • 5½ miles with US 61, from Exit #290 to Exit #295 in Davenport
  • History
  • 1954: Plans for a toll road roughly following I-80's present route -- including a new bridge from Le Claire into Port Byron, IL -- were approved. However, the passing of the Interstate Highway Act in 1956 shelved those plans.
  • September 21, 1958: First segment, from the future western split with I-35 and Douglas Avenue (now in Urbandale), opened (with I-35)
  • November 9, 1958: Segment between Douglas Avenue and Merle Hay Road (IA 401) opened (with I-35)
  • November 28, 1959: Segments between Merle Hay Road and US 69 north of Des Moines (with I-35), and between the Adair interchange and IA 25 opened
  • September 5, 1960: Segments between US 71 and Adair, and between IA 25 and the US 6 interchange east of Dexter, opened
  • November 17, 1960: Segment between US 69 and the US 6 exit between Colfax and Newton opened
  • December 1, 1960: Segment between the western split with IA 38 and US 61 in Davenport opened
  • August 24, 1962: Segment between old IA 1 (now the Hoover Highway) east of Iowa City and IA 38 completed
  • October 8, 1962: Segment between US 6 and IA 14 at Newton opened
  • November 16, 1962: Segments between IA 14 and IA 146 near Grinnell, and between IA 1 (formerly IA 261) and the old IA 1, opened
  • November 15, 1963: Segment between US 218 (later IA 965) and IA 1 in the Iowa City area opened
  • October 23, 1964: Segment between IA 146 and US 218 opened. William H. Thompson, author of the book Transportation in Iowa: A Historical Summary (1989), called the completion of this 56-mile segment "probably the most spectacular effort that Iowa has seen in fifty years of road building."
  • November 25, 1964: Segment between US 61 and US 67 at Le Claire opened
  • December 16, 1965: Segment between US 59 near Avoca and US 71 opened
  • October 27, 1966: Bridge between US 67 and Illinois opened
  • December 13, 1966: Segments between the future I-80/I-680 interchange and US 59, and between US 6 and the southwest I-35/80/235 junction, completed. (At that point, I-680 had been built from I-29 to I-80 and was designated as I-80N until 1973.)
  • July 22, 1968: Segment between Madison Avenue and US 6 in Council Bluffs opened
  • December 22, 1969: Segment between IA 192 and Madison Avenue in Council Bluffs, and between US 6 in Council Bluffs and the I-80/I-680 interchange, opened
  • November 1, 1970: Segment between I-29 and IA 192 in Council Bluffs completed
  • December 15, 1972: Last segment, from Nebraska over the Missouri River to I-29, completed.
  • 1995: Bridge over Mississippi River at Le Claire renamed for Fred Schwengel, a former congressman from Davenport who died in 1993; he was one of the driving forces behind the Interstate Highway Act.
  • Notes
  • I-80 between Earlham and I-35 was originally proposed to follow IA 90 (now County Road F90) closer to the Raccoon River, until the Highway Commission decided to move it to its present route on October 2, 1963. The interchange of I-35 and Grand Avenue was built as a cloverleaf because of the original plans. (The cloverleaf will eventually be eliminated as part of the I-35 widening project.)
  • The current transportation plan calls for improvements to I-80 (as well as I-29 and I-480) in Council Bluffs; more information is available here. The segment through Council Bluffs will involve construction of a "dual, divided freeway" for the I-29/80 multiplex (detailed here) with three local lanes and three express lanes in each direction.
  • Widening of I-80 between I-380 and IA 1 in the Iowa City area was completed in two segments: the segment through Coralville opened to six lanes in 2009, and the segment through Iowa City opened to six lanes in October 2012. The segment from the western I-35/I-235 interchange in West Des Moines to US 65 in Altoona, including all of the multiplex with I-35, was widened from four to six lanes by the end of 2000.
  • Interstate 80N
    Designated: December 13, 1966
    Decommissioned: January 9, 1974
    Original western terminus: I-29 near Loveland
    Original eastern terminus: I-80 near Neola
    Counties: Pottawattamie
    Replaced by: I-680. AASHTO approved the numbering change on November 9, 1973.
    Former terminus photos

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    © 1998-2017 by Jason Hancock / Last updated February 27, 2017