146th St. & Allisonville Rd. Interchange

Project Information

Current Status

2/27/2024:  Please see below for a schedule of our upcoming 90-day closure of Allisonville Road. Remember, eastbound and westbound 146th Street will not be closed nor will the intersection. We currently utilize lane restrictions, which will still be needed from time-to-time along 146th Street. Allisonville Road between 146th Street and Kensington Drive (north of 146th Street), and between 146th Street and Helmsley Court (south of 146th Street) are the closure limits. The posted detour route will be 131st Street, SR-37, and Greenfield Avenue.

146th & Allisonville Closure Map

Thursday, February 29 into Friday, March 1: Our contractor will be completing work in preparation of the upcoming Allisonville Road closure throughout the project limits and along the detour route. At or after midnight, barricades will be put in place along Allisonville Road to close the road for 90 days. Be prepared for lane restrictions or short-duration lane closures along 146th Street after the closure of Allisonville Road is in place, so that the removal of the overhead signal equipment and other work associated with the traffic switch may be completed. 

 Friday, March 1 into Saturday, March 2: Between the hours of 9:00pm and 6:00am, 146th Street traffic should be prepared for lane restrictions or short-duration closures to complete any remaining signal equipment removal and other work associated with this traffic switch.

 Please use extreme caution and reduced speeds while driving through this construction zone.

Project Newsletter - February 7, 2024

flickr photo album

Reason for Project

This project is needed in order to reduce congestion at the existing intersection.

Project Scope

The existing intersection will be converted into a grade-separated interchange. 

Construction Details

  • Design Firm: United Consulting / Butler, Fairman & Seufert 
  • Inspection Firm: United Consulting / Lochmueller Group
  • Contractor: Superior Construction
  • Construction Start Date: Spring 2023
  • Construction Completion: Summer 2025
  • Construction Cost: $44 Million est.


Design costs will be funded locally. This project has been awarded $9.5M in federal funds for construction ($4.25M in CMAQ & $4.25M in STBG). The balance of construction costs will be funded locally.

Allisonville Rd. & 146th St. Interchange