142nd Street & Douglas Parkway Roundabout Improvements
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 continuing the week of September 24th, with sidewalk and trail work the following week. Weather permitting, the north half of the intersection will be completed by the beginning of October. 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.
This project will construct the approaches to better align 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.
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.
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 entering vehicles with the roundabout lanes.
- Visit the Iowa DOT Roundabout Page for more information, including Roundabout Safety and Efficiency and How to Drive a Roundabout.
- Watch Navigating a Multi-Lane Roundabout from the Minnesota Local Roads Research Agency.
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 Agency
Image courtesy of Wisconsin DOT