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.

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?

• Visit wisconsindot.gov/43corridor for project history, design elements and more.