I-43 North-South (Silver Spring Dr. to WIS 60), Glendale to Grafton - Milwaukee and Ozaukee counties

Construction Has Begun

WisDOT's Construction Project websites are located on 511wi.gov. For construction information and progress, as well as real-time traffic conditions, visit the I-43 North-South Construction Website.​​​

---- Design Engineering Information Listed ​Below ---- 

Purpose and need | Contacts 

​​​Project location

I-43, Silver Spring Dr. to WIS 60, Glendale to Grafton, in Milwaukee and Ozaukee counties.

Project overview

The I-43 North-South Freeway is among the busiest routes in Wisconsin and is a critical Interstate link between southeast Wisconsin and the entire state. I-43 provides access to manufacturers, merchants, commuters and tourists within southeast Wisconsin, the Milwaukee metropolitan area, and other areas including Green Bay, Sheboygan, Manitowoc and Chicago.

WisDOT has maintained and rehabilitated the ramps, bridges, pavements and other structures on I-43 for 50 years. The North-South Freeway has exceeded its design life and it is no longer economical to maintain.

This project includes the expansion of I-43 from four to six lanes, the reconstruction of five existing interchanges along the corridor, ​a new interchange at Highland Road, and the replacement of the Union Pacific railroad bridge over I-43 in Glendale. The project also includes the expansion of a section of Port Washington Road in Glendale from two lanes to four lanes. During construction, the project will work to keep two lanes open in each direction - similar to existing conditions.

Congestion and crashes

I-43 carries 53,300 vehicles per day south of WIS 60 and 96,700 vehicles per day north of Silver Spring Drive.

There is regular and significant congestion in the corridor today. Future projections show traffic growing to 63,000 vehicles per day south of WIS 60 and 111,700 vehicles per day north of Silver Spring Drive by 2045.

The purpose of the project is to address:

  • Emerging pavement and structural needs
  • Safety issues
  • Design deficiencies, including clearance at bridges, visibility, and merging and weaving distances
  • Existing and projected traffic volumes

Purpose and need document

This design evaluated:

  • Replacing deteriorating pavement and bridges
  • Reducing congestion and improving safety
  • Providing efficient freeway operations
  • Improving or replacing existing interchanges
  • Proposed new interchange at Highland Road
  • Minimizing impacts to natural and built environments



Steve Hoff, P.E. Project Manager
(262) 548-6718

Dan Sellers, WisDOT SE Region Communications
(262) 548-6702

Wisconsin Department of Transportation (WisDOT)
Southeast Region
141 NW Barstow St.
P.O. Box 798
Waukesha, WI 53187-0798
Phone: (262) 548-5902
Fax: (262) 548-5662
TDD: 711