142nd Street & Douglas Parkway Roundabout Improvements

Description

The City of Urbandale is reconstructing the approaches to the roundabout at Douglas Parkway and 142nd Street.  The reconstruction will provide for safer and more efficient roundabout operations.

The City of Urbandale also completed a project along Aurora Avenue this summer, installing a sidewalk connection to Webster Elementary School, which required Aurora Avenue to be closed.  The Roundabout project was scheduled after the Aurora Avenue project so as to stagger road closures in the area.  Work on roundabout began Monday, August 13, 2018, and has been delayed due to frequent rains.

Detours will be posted.  It is anticipated the project will be entirely completed by the end of November. The City of Urbandale appreciates the public's understanding and patience as we complete this project.

Project Status Update

The north half of the intersection, including westbound Douglas and the North leg of 142nd Street, is currently closed.  Paving on this portion is anticipated the week of September 17th, with sidewalk and trail work the following week.  Weather permitting, the north half of the intersection will be completed by the end of September.  At that time, westbound Douglas will re-open, and eastbound Douglas and the south leg of 142nd Street will close in order to reconstruct the south half of the intersection.  See Project Status Map

Intersection Improvements

This project will reconfigure the approach alignment with the lanes of the Roundabout.  This will improve safety by providing a better vehicle path through the intersection, and improve efficiency by maximizing the use of both lanes.

BEFORE
Today's guidelines for Roundabout Design recommend a layout similar to a pinwheel.  The current intersection is shaped more like a plus sign.  The proposed changes will improve safety and efficiency.
AFTER
Changes to the approaches will ease the angle of the entry into and exit from the roundabout.  This will reduce the risk of broadside collisions, and improve efficiency by aligning the vehicles with the roundabout lanes.
ExistingProposed

Roundabouts

Remember, choose your lane at a multi-lane roundabout just as you would at a multi-lane traditional intersection.  Yield to vehicles already in the intersection, then proceed through.

Image courtesy of Minnesota Local Roads Research AgencyRoundabout Signs

Image courtesy of Wisconsin DOTMulti-Lane Roundabouts

Contact Us

  1. Engineering & Public Works


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    3600 86th Street
    Urbandale, IA 50322
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    Phone: 515-278-3950
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