WIS 27 (I-90 Exit 25 Interchange area), Sparta

Project location | Project overview | Schedule | Traffic impacts/detours | Status/phase | Contact information

Project location

WIS 27 (I-90 Exit 25 Interchange area), Sparta - Monroe County

Map legend

Orange = Area being reconstructed

Blue = Detour route

Red = Closed section during bridge repairs

Project overview

This project extends just south of the interchange to just north of the interchange. The purpose of this project is to preserve and improve the existing highway pavement for WIS 27 over I-90 and associated on/exit ramps for the I-90/WIS 27 interchange area. WIS 27 bridges over the railroad/bike trail and the river will also be repaired during this project. 

Improvements include:

  • Milling and overlaying the existing asphalt pavement.
  • Guardrail will be updated to current standards.
  • Shoulders south of the I-90 interchange will be widened to 5 feet paved.
  • Lane configuration will be redone to have only one lane of traffic in each direction through the divided section of roadway.
  • Right turn from the I-90 eastbound off ramp will be turned into an auxiliary lane.
  • Eastbound ramp intersection will be upgraded to signals.


  • December 11, 2019 - Public involvement meeting (PIM)
    • 4:30 - 6 p.m.
    • Sparta City Hall, 201 W. Oak Street, Sparta WI
  • 2022 - Construction anticipated

Traffic impacts/detours

The divided roadway section will have single lane closures. The two lane sections south of I-90 will be constructed during night time flagging and north of Avon Road will be closed to traffic with a detour.

Detour will be as follows:

  • Take I-90 to WIS 16 interchange
  • Exit onto WIS 16
  • Follow WIS 16 back to WIS 27 in Sparta
The ramps will be constructed one at a time during a single night closure for each. Dates yet to be determined. 



Contact information

Brian Meyer, P.E., WisDOT Project Manager
(608) 785-9462

Michael Bie, WisDOT Southwest Region Communications Manager
(608) 246-7928

Wisconsin Department of Transportation (WisDOT)
Southwest Region, La Crosse Office
3550 Mormon Coulee Road
La Crosse, WI 54601
Phone: (608) 785-9022
Fax: (608) 785-9969
TTY: 711
Email: swr.dtsd@dot.wi.gov