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US 12 project

US 12 is a major east-west arterial route that integrates local traffic into the state and national highway systems. Since its construction in the 1920s, this route has served local residents, farmers, tourists and commercial interests. 

For many years, this section of road was able to accommodate the mix of traffic, including an increasing amount of commuters from Sauk and Dane counties, in a reasonably safe manner. However, due to increasing traffic volumes and changes in design standards, this two-lane roadway no longer met capacity and other safety-related requirements.

To meet these growing demands, a four-lane divided highway from Middleton to Sauk City was constructed from April 2002 to November 2005. The 18-mile project included widening the Wisconsin River bridge crossing at Sauk City and constructing a bypass of the city of Middleton that connected with the US 14 interchange.

Finishing details and landscaping work will occur in spring 2006. Motorists may encounter occasional single-lane closures during non-peak hours as crews complete the work.

Project photographs

• Aerial photographs of ongoing construction - August 29, 2005

Questions about the content of this page:
Southwest Transportation Region, madison.dtd@dot.state.wi.us
Last modified: March 14, 2006