Sioux City
Woodbury County |
Intersection of Old Lakeport Road/Christy Road/Elk Creek Road |
One-lane roundabout with five approaches. Replaced an all way stop and stop on T-intersection |
2024 (currently wrapping up) |
| Linn County |
7th Ave/7th Street |
— |
2016 |
Marion
Linn County |
7th Ave/27th Street |
— |
2016 |
Marion
Linn County |
Royal Oak Ridge / Stags Leap Lane |
Mini-roundabout |
— |
Marion
Linn County |
29th Ave/35th Street |
Mini-roundabout |
2016 |
Altoona
Polk County |
Bass Pro Dr & Prairie Fire Blvd |
Multi-lane in new commercial development; only two legs open |
2009 |
| Cedar Rapids in Linn County |
Kirkwood Blvd & 76th Ave. SW |
Replacing all-way stop |
2017 |
Ankeny
Polk County |
Irvinedale Dr & Vintage Pkwy/Polk City Dr |
Replacing all-way stop |
2012-2013 |
Ankeny
Polk County |
SW Campustown Ct |
New construction on DMACC campus |
2012-2013 |
Ankeny
Polk County |
SW Cherry St & SW 11th St |
New roadway adjacent to new HS & MS |
2011 |
| Ankeny Polk County |
NW 5th Street & NW Abbie Drive |
New residential development |
2008 |
Ankeny
Polk County |
SW Snyder Blvd & SW Springfield |
New residential development |
2006 |
Ankeny
Polk County |
NW 13th Street & NW Boulder Drive |
New residential development |
2005 |
Ankeny
Polk County |
SW White Birch Dr & SW Braeburn St |
New residential development |
2005 |
Ankeny
Polk County |
SW Goodwin St & SW Springfield Dr |
One of three in a new residential development |
2004 |
Ankeny
Polk County |
SW Somersby Blvd & SW Springfield Dr |
One of three in a new residential development |
2004 |
Ankeny
Polk County |
SW Somersby Blvd & SW 46th St |
One of three in a new residential development |
2004 |
| Bettendorf in Scott County |
Middle Road & 53rd Avenue |
Designed to accommodate multiple lanes in the future |
2002 |
| Rural Black Hawk County |
Independence Ave (Iowa 281) & Raymond Rd (V49) |
First high-speed, rural roundabout in Iowa; 55mph approaches |
2008 |
| Rural Buchanan County |
C57 and V62 |
Rural, high-speed intersection; replaced two-way stop intersection |
2012 |
Cedar Falls
Black Hawk County |
Ridgeway Ave & Chancellor Dr |
Realigned north approach, replaced T-intersection |
2011 |
Cedar Falls
Black Hawk County |
Brandilynn Blvd & Prairie Pkwy |
In new commercial development |
2009 |
Cedar Falls
Black Hawk County |
Viking Road & Cedar Heights Drive |
One-lane/two-lane hybrid on new alignment; north leg may be added later |
2007 |
Cedar Rapids CC
Linn County |
Kirkwood CC Entrance & Training Rd |
One-lane/two-lane hybrid |
2011 |
Clive
Dallas County |
Berkshire Parkway & Boston Parkway |
In new residential development |
2005 |
Clive
Dallas County |
NW 156th Street & Boston Parkway |
Combination dual/single-lane |
2002 |
Clive
Dallas County |
Berkshire Parkway & Sheridan Avenue |
Three public approaches, fourth is private access |
2001 |
| Coralville in Johnson County |
Ridgeway Dr & University Ct |
New 3-leg intersection |
2013 |
| Coralville in Johnson County |
University Pkwy & University Ct |
New 3-leg intersection |
2013 |
| Coralville in Johnson County |
Heartland Dr & Heartland Place |
New 5-leg intersection |
2013 |
| Coralville in Johnson County |
Holiday Road & Corridor Way |
South approach is commercial access |
2007 |
Coralville
Johnson County |
E 9th St & Quarry Road |
Double-lane, three approaches, with hotel on east approach |
2006 |
Coralville
Johnson County |
12th Ave & Forevergreen Rd |
North approach is middle school entrance |
2005 |
| Coralville in Johnson County |
1st Ave & Holiday Rd |
Hybrid dual/single-lane with three approaches |
2002 |
Des Moines
Polk County |
SW 28th St & Rittenhouse St & Gannett Ave |
In the Airport Business Park, just south of Army Post Road |
2000 |
| Rural Fayette County |
Iowa 3 & Iowa 187 |
Rural, high-speed, adjacent to Starmont HS |
2009 |
Fort Dodge
Webster County |
10th Ave N & N 32nd St |
Replaced two "T" intersections |
2009 |
Gilbert
Story County |
E23 & Matthews Dr |
Between three schools; replacing all-way stop |
2013 |
Iowa City
Johnson County |
Grand Ave & S Grand Ave |
Three approaches; on U of Iowa campus |
2007 |
Iowa City
Johnson County |
Kennedy Parkway & Meadowlark Dr |
In new residential development |
2006 |
Janesville
Bremer County |
US 218 southbound ramp terminal at C50 |
Diamond interchange ramp terminal with 5th leg for frontage road |
2012 |
Janesville
Bremer County |
US 218 northbound ramp terminal at C50 |
Diamond interchange ramp terminal |
2012 |
Johnston
Polk County |
NW 62nd Ave & Pioneer Campus |
1 of 4 on 62nd Ave corridor |
2012 |
Johnston
Polk County |
NW 62nd Ave Corridor |
2 of 4 on 62nd Ave corridor |
2012 |
Johnston
Polk County |
NW 62nd Ave Corridor |
3 of 4 on 62nd Ave corridor |
2012 |
Johnston
Polk County |
NW 62nd Ave Corridor |
4 of 4 on 62nd Ave corridor |
2012 |
Marion
Linn County |
35th St & Tower Terrace |
Two-lane and one-lane roundabout on new road |
2011 |
Marion
Linn County |
Tower Terrace & Alburnett Rd |
New intersection on Alburnett Rd |
2013 |
Mason City /
Cerro Gordo County |
Mason City High School |
Reconfigured intersection adjacent to new entrance |
2013 |
Mount Vernon
Linn County |
US 30 & Iowa 1 |
Replaced 4-way stop |
2013 |
Mount Vernon
Linn County |
US 30 & 10th Ave S |
Three-approaches replacement for 1-way stop |
2013 |
Oskaloosa
Mahaska County |
Orchard Ave & Old Pella Rd/Old 163 |
Includes pedestrian underpass and open center |
2003 |
Ottumwa
Wapello County |
S Jct US 34 & US 63 |
Three approaches; includes right turn bypass lanes |
2006 |
Peosta
Dubuque County |
Peosta St & NICC entrance |
Single-lane, new entrance into college |
2012 |
Urbandale
Dallas County |
NW 142nd St & Douglas Parkway |
Double-lane; south approach realigned to create four approaches |
2004 |
Waverly
Bremer County |
1st Ave NW & 8th St NW |
Replaced "T" intersection at entry to Wartburg College |
2004/5 |
West Des Moines
Dallas County |
Blue Stem Cir; Village View Dr & S Prairie View Dr |
New residential/commercial development on former Ponderosa Golf Course |
2007 |
West Des Moines
Dallas County |
Stagecoach Dr & S Crescent Way |
Intersection of two private residential streets on former Ponderosa Golf Course |
2007 |
West Des Moines
Dallas County |
S Crescent Way & S Ridgefield Way & Fairway Dr |
Intersection of two private residential streets on former Ponderosa Golf Course |
2007 |
West Des Moines
Dallas County |
West Access & W Wells Fargo Trail |
In new Wells Fargo development |
2006 |
West Des Moines
Dallas County |
W Wells Fargo Trail & Wells Fargo Terrace |
In new Wells Fargo development |
2005 |
West Des Moines
Dallas County |
W Wells Fargo Trail & E Wells Fargo Terrace |
In new Wells Fargo development |
2005 |