Coral Ridge Avenue Improvements

News: Construction re-started in April 2019.
For more information, see "Updates" below.

Coral Ridge Avenue Improvements: Oakdale Boulevard to Forevergreen Road

Coral Ridge Avenue from Oakdale Boulevard to Forevergreen Road underwent total reconstruction in 2018 and will continue in spring 2019. This is the final section of Coral Ridge Avenue that needs to be improved.
  1. Highlights
  2. Cost
  3. Timeline


After work is complete, this widened one mile stretch of Coral Ridge Avenue will feature:
  • Four lanes (widened from the current two lanes), with a raised center median and dedicated turn lanes at all intersections
  • Upgraded traffic signals at both Oakdale Boulevard and Forevergreen Road
  • New traffic signals at both University Parkway and Wheaton Road
  • New pedestrian tunnel just north of Oakdale Boulevard
  • New 10' trail along the west side of Coral Ridge Avenue
  • New storm sewer system and stormwater quality enhancements
  • Roadway lighting and landscaping
Coral Ridge Ave Improvements

Contact Us

  1. Dan Holderness

    City Engineer

    Scott Larson

    Assistant City Engineer

    1512 7th St.
    P.O. Box 5127
    Coralville, IA  52241

    Ph: 319.248.1720
    Fx: 319.248.1894

    Staff Directory

At a Glance

Final improvements to be completed in spring 2019:

  • The initial focus is to complete final street, median, and sidewalk construction on the east half of Coral Ridge Avenue between University Parkway and Forevergreen Road
  • Roadway lighting
  • Remaining intersection paving at University Parkway, Wheaton Road, and Forevergreen Road
  • Streetscaping at all intersections
  • Sidewalk and trail connections, including through the new pedestrian underpass north of Oakdale Boulevard
  • Stormwater bio-retention cells along both sides of Coral Ridge Avenue to help remove pollutants from street runoff
  • Final landscaping, including street trees
Spring 2019 traffic impact:
  • Expect lane closures, with efforts to minimize traffic impact
  • Traffic runs head-to-head on the west half of Coral Ridge Avenue between University Parkway and Forevergreen, similar to the traffic control setup last fall, from April until mid-to-late May. The speed limit is reduced to 35 MPH where traffic control devices are installed.
  • From mid-to-late May until the project is substantially complete in late June, Coral Ridge Avenue traffic will shift to single lanes northbound and southbound, but on the correct side of the center median.  Northbound and southbound Coral Ridge Avenue will generally remain one lane until project completion to give contractors room to work beyond the curbs or within the center median. 
Side street closures (see image below)
  • The east and west legs of Coral Ridge Avenue & University Parkway (including IMCC’s northerly entrance) are closed.  
  • Wheaton Road is closed between Coral Ridge Avenue and Crosspark Road.

Side street closures

Coral Ridge Ave access closed at University Pkwy and at Wheaton Rd.


Current & Upcoming Work*

Work May 9-16 included:
  • Continued concrete pours on the east legs of Wheaton Road and University Parkway.  The east leg of Wheaton Road still needs the crosswalk subslab. Crews poured concrete in the southeast quadrant of the University Parkway intersection on May 16.
  • Working on east-west crosswalk banding through the northbound lanes of Coral Ridge Avenue at Forevergreen Road, Wheaton Road, and University Parkway.
  • Completed light pole installation along the east side of Coral Ridge Avenue from Oakdale Boulevard to Forevergreen Road.  Light poles will be set along the west side of Coral Ridge Avenue between University Parkway and Forevergreen after the next traffic shift scheduled for later in May. 
  • Intermittent rains hampered progress on grading the remaining bio-retention cells, completing additional sidewalk construction, and completing final seeding in areas that are substantially complete.
Progress expected May 16-23, weather permitting:
  • On May 17, the contractor is scheduled to grind rectangular areas over each of the old chevron markings within northbound Coral Ridge Avenue approaching Oakdale Boulevard. This will obscure the old chevrons enough that more drivers will feel comfortable using the second northbound through lane. 
  • Complete street connections at the Wheaton Road and University Parkway intersections.
  • Complete east-west crosswalk subslabs and pavers through the northbound lanes of Coral Ridge Avenue. 
  • Continue center median brick pavers and landscaping.
  • We continue to push for the completion of sidewalks and corner areas at the Coral Ridge Avenue & Oakdale Boulevard intersection, and the shared use path connection to the new underpass tunnel just north of Oakdale Boulevard.  
Looking ahead
  • The current traffic setup is expected to remain in place until late May and then northbound Coral Ridge Avenue traffic will move to correct side of the center median through the entire project corridor.  Traffic will be restricted to one lane in each direction through most of the project corridor until the project nears completion.   
  • The Coral Ridge Ave project has a substantial completion date of June 28, 2019. 
*Updated May 16, 2019

Merging Traffic

How to Merge Efficiently on Coral Ridge Avenue

When traffic is slow and heavy, merging too early can create traffic backups. During peak traffic times on Coral Ridge Avenue, using a "zipper merge" can keep traffic moving and reduce traffic backups.

A "zipper merge" is when drivers use both lanes of traffic until they reach the defined merge area, and then alternate in "zipper" style into the open lane. This maximizes road space, reduces congestion, and allows both lanes to move at similar speeds.

How to "Zipper Merge"
  1. Watch for signs giving drivers notice that there is a merge ahead
  2. Stay in your lane up to the point of merge
  3. Take turns with drivers to safely ease into the remaining lane
  4. Always merge when it is safe

Merging FAQs

When is it best to use the zipper merge?

When traffic is congested and traveling at slower speeds, it is best to remain in your lane until the point where traffic can take turns merging, which is indicated by a "BEGIN MERGE" sign.

When is it best to merge early?
When traffic conditions are light and vehicles are traveling at highway speeds, it is best to merge as soon as safely possible.

Zipper Merge Resources

Take Turns sign

Pre-Project Planning

Duct Banks

In anticipation of the 
project, underground duct banks were proactively constructed in 2017. These duct banks provided places for the private utilities companies to relocate their overhead and underground facilities to be out of the way before the 2018 improvement projects. The duct banks should minimize delays caused by private utility relocations, which can be common during street projects.

Stay Informed

  1. Construction to Resume on Coral Ridge Avenue

    Construction on Coral Ridge Ave. between Oakdale Blvd. and Forevergreen Rd. will start again on April 2 Read on...
  1. Construction to Resume on 1st Avenue

    Work on the final remaining improvements for 1st Avenue from 6th Street to 9th Street will start again on April 1 Read on...
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