County Highway K


County Highway K
Village of Sussex, Village of Lisbon, Village of Menomonee Falls

Welcome to Waukesha County Public Works' info page for the 2026 project on CTH K.

Please find regular updates on project impacts to residents, businesses, and Waukesha County drivers.  Thank you!

Questions and comments?  Contact us!

Nate Beth
Project Manager
262-548-4720

Project Form

Project Updates

February 25, 2025

Project Overview - work to be completed:

  • The CTH K project will examine a 5-mile segment from CTH JK (Lunndale Rd) to CTH Y (Lannon Rd).  The project will address safety, pavement conditions, traffic operations, and railroad crossings.
  • Preliminary planning study to evaluate reconstruction alternatives which includes reconstruction without additional capacity and a future 4-lane expansion of CTH K.
  • Study to reevaluate whether a grade separation over the Canadian National Railroad is feasible and cost effective.  This will be updating the previous study done in 2007.

Project Schedule:

  • Corridor Crash and Traffic Report - March 2025
  • Corridor Environmental Scan - March 2025
  • Public Involvement Meeting - May 2025
  • Final Destination Alternatives, Impacts and Cost Estimates - October 2025
  • Public Involvement Meeting - December 2025
  • Final CTH K Program Report - March 2026

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