1st Avenue Improvements

1st Avenue Improvements: 6th Street to 9th Street


1st Avenue between 6th Street and 9th Street began total reconstruction in 2018 and is finishing in spring 2019. This is the final section of 1st Avenue to be improved south of Interstate 80.


Highlights


Reconstruction on this stretch of 1st Avenue featured:
  • Four through lanes and one continuous center turn lane
  • 10 foot wide sidewalks and brick paver treatments on both sides
  • Upgraded traffic signals at E. 7th Street
  • Northbound 1st Avenue right turn lane onto E. 7th Street
  • New traffic signals at 6th Street with a new four-leg intersection at 1st Avenue and 6th Street to accommodate a future connection of E. 2nd Avenue on the east leg
  • Railroad crossing signals and gates at 1st Avenue & 6th Street
  • New public utilities (storm sewer, sanitary sewer, and water main)
  • Lighting and streetscaping, including trees


Updates


Current & Upcoming Work*


Work May 16-24 included:
  • All lanes on 1st Avenue are open. The speed limit is 25 MPH.
  • Crews are finished the day on May 24 with minor brick paver work, sign installations, and general cleanup.
  • The sidewalk along the east side of 1st Avenue between Super 8 and E. 7th Street will remain closed while work continues on the west façade of the Latitude residential development.   
Looking ahead:
  • The project is not 100% finished. There is a list of items the contractor needs to address before the City can accept the project. That work will take place over the next few weeks. Some of this work will require lane closures, but the length and duration of the lane closures will be minimized. 
*Updated May 24, 2019

About the Project

  1. Cost
  2. Timeline
  3. Traffic Impact
  4. Resources
  5. Videos

Cost


  • Bid in January 2018 IDOT letting
  • Low bid: $7,186,554.84 (Langman Construction of Rock Island, Illinois) 
  • Funding: $5.1 million of Surface Transportation Program funds, and local funds

Finishing 1st logo

Contact Us

  1. Dan Holderness


    City Engineer
    Email

    Scott Larson


    Assistant City Engineer
    Email

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

    Ph: 319.248.1720
    Fx: 319.248.1894

    Staff Directory
1st Ave Construction Map 2018

Merging Traffic


How to Merge Efficiently on 1st Avenue


When traffic is slow and heavy, merging too early can create traffic backups. During peak traffic times on 1st 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 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 minimized delays caused by private utility relocations, which can be common during street projects.


How We Keep Traffic Moving


To reduce traffic delays during construction:
  • Staff monitored traffic times and adjusted the timing of traffic signals as needed to help the traffic flow on 1st Avenue
  • Installed fiber optic communications at the 1st Avenue/E. 9th Street traffic signal
  • Installed pan/tilt/zoom cameras on 1st Avenue at both 5th Street and E. 9th Street, along with existing cameras at 1st Avenue/Highway 6, to remotely monitor traffic for the project corridor and beyond
  • Repositioned the traffic detection cameras at 1st Avenue/E. 9th Street to minimize false detections
  • Installed traffic detection cameras at the 1st Avenue/Interstate 80 traffic signals to replace the in-pavement traffic detection wire loops


Stay Informed


  1. Lane Closure on E. 9th Street from E. 2nd Avenue to Quarry Road

    Eastbound E. 9th St. reduced to one lane near Xtream Arena, August 19-28 Read on...
  2. West Leg of University Parkway at Coral Ridge Avenue Reopens

    This is the main entrance for the Iowa Medical and Classification Center Read on...
  3. Northbound 1st Avenue Lane Reduction

    Northbound 1st Avenue will be reduced to one lane August 15-21. Read on...
  1. Southbound 1st Avenue Lane Reduction

    Southbound 1st Avenue will be reduced to one lane August 5-14. Read on...
  2. Lane Closures: 12th Avenue and Oakdale Boulevard Pavement Repair

    12th Avenue is expected to re-open to traffic by Tuesday, August 20 Read on...
  3. 6th Street Closure: 10th Avenue to 11th Avenue

    6th Street is expected to re-open to traffic by Tuesday, August 20. Read on...
More News