I-43 North-South (Glendale to Grafton)

Milwaukee and Ozaukee Counties

Project Overview

The Wisconsin Department of Transportation (WisDOT) has maintained and rehabilitated these ramps, bridges, pavements and other structures on I-43 for over 50 years. The North-South Freeway has exceeded its design life and it is no longer economical to maintain.

To modernize this corridor, improvements will be constructed along 14 miles of I-43, from Silver Spring Drive north to WIS 60, in Milwaukee and Ozaukee counties.

What kind of improvements?

  • expansion of I-43 from four to six lanes (three lanes in each direction)
  • reconstruction of five existing interchanges along the corridor
    • Good Hope Road
    • Brown Deer Road – constructing a new Diverging Diamond Interchange
    • County Line Road – constructing a new full-service interchange¬†
    • Mequon Road
    • Pioneer Road (County C)
  • construction of a brand new interchange at Highland Road
  • replacement of the Union Pacific railroad bridge over I-43 in Glendale
  • expansion of Port Washington Road in Glendale between Bender Road and Daphne Lane (expanding from two lanes to four lanes that will tie-in to the existing four lanes on each end of this roadway section.)

Why is it needed?

  • Accommodate existing and projected future traffic volumes.
  • Address pavement and structural needs.
  • Improve safety by modernizing the corridor using current design standards.

Want a recap on how the project got here?