I-43 Rock Freeway (WIS 83 to WIS 164) – Waukesha County

Location

Proposed Improvements

The project scope includes replacing the pavement along I-43 between WIS 83 and WIS 164, and reconstruction of the I-43 and WIS 164 interchange with the WisDOT recommended alternative being a new Diverging Diamond Interchange (DDI) layout.

Learn more about the Diverging Diamond Interchange (DDI) here.

Additional project elements include:

• Improvements to the Big Bend Park and Ride (southeast quadrant of WIS 164 interchange)
• Replace guardrail
• Culvert pipe repair/replacement and cleaning
• Drainage improvements at the northwest quadrant of I-43 and WIS 164
• Replace existing signing and pavement marking
• Structure repairs to many of the bridges along the corridor

Public Involvement

Public Involvement Meeting #2

WisDOT hosted a second in-person public involvement meeting for this project on Thursday, March 13, 2025, at the Vernon Fire Department. Below are the exhibits that were available for viewing at the meeting.

• Meeting Handout
• Overview Roll Plot (larger files may take a moment to load)
• DDI Overview (larger files may take a moment to load0
• I-43 Typical Section
• WIS 164 Typical Section
• Staging Typical Section
• Comment Form

Public Involvement Meeting #1

WisDOT hosted a public involvement meeting on October 26, 2022 at the town of Vernon Fire Department to discuss the proposed improvements. Materials and exhibits shared at the meeting are posted below to help give more opportunity for public feedback.

• Meeting Handout
• Corridor Overview

Diverging Diamond Interchanges:

• What is a Diverging Diamond Interchange?
• I-43 and WIS 164 Proposed DDI Exhibit

Traffic Staging

Traffic along I-43 and WIS 164 will be reduced to a single lane in both directions and work will be staged with a crossover where traffic will be shifted to the opposite direction. It is anticipated that most of the work would occur during daytime hours. Access for residents, businesses, and emergency services will be coordinated and maintained throughout the project limits during construction.

Schedule

Construction is scheduled to begin in 2026 and continue through 2027.

Project Status

Design phase - Do you have any comments or questions? We'd like to hear from you! Please feel free to contact the project representatives below.

Contacts

Evan Limberatos, PE
Design Project Manager
(262) 548-8797
evan.limberatos@dot.wi.gov

Dan Sellers
Regional Communications Manager
(262) 548-6702
daniel.sellers@dot.wi.gov