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


I-43 Rock Freeway (WIS 164 to WIS 83) Map 

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.​​

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

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.

​​Diverging Diamond Interchanges:

​Traffic Staging

​Traffic staging alternatives that are being considered include staging with inside/outside construction, staging with a crossover where traffic will be shifted to the opposite direction, or a full-time closure and detour to complete the work. The two staging alternatives will likely require long-term single lane closures and ramp closures. It is anticipated that most of the work would occur during daytime hours.


​Construction is scheduled for 2026.

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.


Evan Limberatos, PE
Design Project Manager
(262) 548-8797

Dan Sellers
Regional Communications Manager
(262) 548-6702