Interstate 380

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Looking north at Interstate 380, U.S. 218 & Iowa 27 from the 120th Street overpass at Shueyville. The freeway crosses the Linn County line one mile to the north. Photo taken 12/31/14.

Interstate 380 spurs northwest from Interstate 80 at Coralville, 73 miles to Waterloo. The freeway doubles as the Avenue of the Saints (Iowa 27), a four-lane corridor linking St. Louis, Missouri with the Twin Cities in Minnesota. Construction along I-380 started in the early 1970s, with the freeway opened from I-80 to Cedar Rapids by 1976, and from Cedar Rapids to Waterloo in 1985.

Interstate 380 Iowa Guides

Four sets of speed cameras operate along Interstate 380 through the city of Cedar Rapids. These were positioned where the speed limit reduces to 55 miles per hour, with the initial one installed along northbound at Diagonal Drive SW in May 2010.1 Cameras commenced operation along southbound at H Avenue NE in October 2010.2 The last installation took place in December 2010, with cameras attached to a sign bridge along I-380 south at the 1st Avenue West exit.3

Interstate 380 at Boyson Road in the city of Hiawatha. Photo taken 03/30/16.

Violations were scaled upwards depending upon how fast a vehicle was clocked, with citations issued at 67 MPH (12 over the posted limit). Two of the four cameras eventually came under review, as they violated DOT regulations due to their placement within 1,000 feet of a speed limit change.4

A Polk County District Court judge eventually ruled that the Iowa DOT camera rules were established properly and that the state had final say over devices used on primary highways. The court decision made on April 27, 2017 ordered that the speed cameras in Cedar Rapids were to turn off or be relocated.5 A subsequent court decision by the Iowa Supreme Court on April 27, 2018 reversed the lower court ruling, clearing the way for Cedar Rapids, Des Moines and Muscatine to restart their respective camera programs. Cameras in Ceda Rapids remained in place during the intervening period, collecting data but not issuing traffic tickets. The city of Cedar Rapids is conducting a follow up analysis on the camera program.6

A $350 million project started in July 2017 upgrades the exchange joining Interstate 380 with I-80 and U.S. 218 in Johnson County. With construction extending through 2024, work replaces the cloverleaf into a systems interchange. The changes will improve safety by eliminating weaving traffic patterns on both freeways and improving the ramp geometry for heavy truck traffic. Coupled with the project is the addition of a new interchange with Forevergreen Road along I-380.7

Interstate 380 scenes
County Road F28 (250th Street) eastbound meets Interstate 380, U.S. 218 & Iowa 27 at a diamond interchange on the west side of North Liberty. This exit serves a pair of industrial parks and newer apartments. Photo taken 09/04/05.
33rd Avenue west at the diamond interchange with Interstate 380 & Iowa 27 in Cedar Rapids. Photo taken 05/23/08.
The southbound on-ramp to I-380 & IA 27 toward Coralville and Iowa City departs 33rd Avenue westbound. The arterial winds southwest by a number of lodging establishments and other traveler services to an adjacent industrial park west of old U.S. 218 (6th Street SW). Photo taken 05/23/08.
Interstate 380 shields posted along 33rd Avenue eastbound in Cedar Rapids. Photo taken 05/23/08.
33rd Avenue east at I-380/Iowa 27 south. The arterial transitions into a two lane residential street beyond J Street nearby. Photo taken 05/23/08.
42nd Street NE connects with I-380/Iowa 27 at the south end of a split diamond interchange with Blairs Ferry Road. Photo taken 05/26/18.
The entrance ramp for I-380 north from NE 42nd Street forms a collector distributor roadway through the adjacent three-level interchange with Iowa 100. A CN Railroad parallels to the east. Photo taken 05/26/18.
Blairs Ferry Road west at Interstate 380 in north Cedar Rapids Photo taken 05/26/18.
A c/d roadway system runs south from Blairs Ferry Road through the exchange with Iowa 100 to 42nd Street NE. Photo taken 05/26/18.
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Boyson Road west at the diamond interchange with Interstate 380/Iowa 27 in Hiawatha. Photos taken 03/30/16.

  1. "Speeders on I-380 to start receiving tickets." Gazette, The (Cedar Rapids-Iowa City, IA), June 12, 2010.
  2. "Southbound I-380 speed cameras in C.R. to be in operation by midmonth." Gazette, The (Cedar Rapids-Iowa City, IA), October 1, 2010.
  3. "Last speed cameras go up on Interstate 380." Gazette, The (Cedar Rapids-Iowa City, IA), December 4, 2010.
  4. "C.R. not budging on speed cameras - DOT suggests I-380 cameras will need to move to comply with new state law." Gazette, The (Cedar Rapids-Iowa City, IA), September 9, 2014.
  5. "Judge: Iowa DOT has authority to turn off traffic cameras." The Gazette (Cedar Rapids, IA), April 27, 2017.
  6. "No new tickets from Interstate 380 speed cameras yet." The Gazette (Cedar Rapids, IA), May 17, 2018.
  7. "Construction timeline for I-380/80 Interchange." KCRG-TV9 (Cedar Rapids), April 23, 2018.

Photo Credits:

  • 09/04/05 by AARoads.
  • 05/23/08 by AARoads.
  • 03/30/16 by AARoads.
  • 05/26/18 by AARoads and Jeff Morrison.

Connect with:
Interstate 80
U.S. 20
U.S. 30
U.S. 151
U.S. 218
Highway 27 - Avenue of the Saints

Page Updated 12-17-2019.