Wisconsin Department of Transportation

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US 12 Corridor, aka Baraboo Bypass
Baraboo, Sauk County

View US 12 Corridor, aka Baraboo Bypass in a larger map.
Map key - Thick orange line is the project overview/location, thin purple and green lines are project segments, and the blue tear drop with dot in center are the project limits.
Wisconsin 511 travel information

Location | Overview | Status/phase

Project location

US 12, I-90/94 (Lake Delton) to Ski Hi Road (south of Baraboo), in Sauk County.

Project overview

The project involves 11.1 miles of construction.

South section (green line on map)

  • 5.4 miles of proposed four-lane bypass from Terrytown Road south to Ski Hi Road around the city of Baraboo.
  • Interchanges scheduled to be constructed at WIS 136 and County W.
  • South of Baraboo, freeway will change to an expressway with limited access to some businesses/homes and full access to the Lehman Road and Ski Hi Road intersections.

Bike/pedestrian accommodation (yellow line on map)

  • Starts at the US 12 bypass along Fern Dell Road and ends at Frontage Road West (near the intersection of Wisconsin Dells Parkway South and N. Gasser Road) in the village of Lake Delton.
  • Located adjacent to north section of the US 12 bypass.
  • Will connect to north section bypass project just west of the Giebel Court/Moon Road/Fern Dell Road roundabout.

North section (purple line on map) - Construction completed

  • 5.7 miles of a four-lane bypass - I-90/94 (just north of Fern Dell Road) south to Terrytown Road.
  • Interchanges constructed near Fern Dell Road, at North Reedsburg Road and at WIS 33.
  • New US 12 passes over Fern Dell Road, North Reedsburg Road and Terrytown Road and passes under Shady Lane, WIS 33 and Old WIS 33.

US 12 is a principal east-west connector route across south central Wisconsin and connects Dane and Sauk counties to the interstate system.

This section of US 12 serves as a prime tourism center with the various natural areas Ė Devilís Lake and Mirror Lake State Parks, the many attractions in Lake Delton, Baraboo and Wisconsin Dells, and the Ho-Chunk Nation Casino.

Construction on north section started spring 2009 and was completed fall 2011.

Construction on south section scheduled to start spring 2015 or later with a scheduled completion date of fall 2017 or later.

Project cost estimated at $200 million (including design, real estate and construction).

Status/phase

  • South section - Design work with construction scheduled for 2015 or later.
  • Bike/pedestrian accommodations - Design work with construction scheduled for 2014.
  • North section - Construction completed.

Questions about the content of this page, contact:
WisDOT Southwest Region Office-Madison, swr.dtsd@dot.wi.gov
Last modified: June 19, 2013

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