Governor Evers has approved a $68.1 million pavement replacement and improvement project along approximately 9.8 miles of Interstate 43 (I-43) from State Highway 83 to Bowers Road in Waukesha and Walworth counties. Musson Brothers Inc. is the prime contractor for the project. Preparation work is scheduled to begin the week of October 5, with major construction activities starting in spring 2027. 

Improvements 

2026 preparation work

• Construct temporary emergency pullouts
• Construct temporary widening of lanes and ramps

Spring 2027 to 2029

• Replace the entire pavement structure within project limits, including ramps
• Various structural improvements to bridges and retaining walls along the corridor
• Various culvert pipe repairs, replacements, and cleanings
• Replace guardrails
• Replace existing signing and pavement markings
   

Traffic Impacts

2026 

Overnight lane and ramp closures for preparation work.

2027 to 2029

 I-43 will remain open in both directions with staged construction. Crossovers will be utilized. Temporary ramp closures will be required to accommodate ramp construction. Various local road closures will be required for structure work. Detours will be posted during closures.

Local access will be maintained to businesses and residences.

Schedule

• Preparation work is scheduled to begin the week of October 5, 2026. Major construction activities will begin in spring 2027.
• The entire project is scheduled for completion in 2029.

All work is weather-dependent and subject to change.

Visit the project webpage.

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