U.S. Route 12 in Wisconsin

US Highway 12
Route information
Maintained by WisDOT
Length:	339.40 mi (546.21 km)
Existed:	1926 – present
History:	Designated in 1917 as WIS 12
Major junctions
West end:	I-94 / US 12 in Hudson
	I-94 in Hudson I-94 in Elk Mound I-94 in Black River Falls I-94 in Tomah I-90 in Tomah I-90 / I-94 in Wis. Dells I-90 / I-94 in Lake Delton I-39 / I-90 in Madison I-43 in Elkhorn
East end:	US 12 in Genoa City
Location
Counties:	St. Croix, Dunn, Chippewa, Eau Claire, Clark, Jackson, Monroe, Juneau, Sauk, Dane, Jefferson, Rock, Walworth
Highway system
United States Numbered Highway System List Special Divided Replaced Wisconsin State Trunk Highway System Interstate U.S. State Scenic Rustic ← WIS 11 WIS 13 →

U.S. Highway 12 (US 12 or Highway 12) in the U.S. state of Wisconsin runs east–west across the western to southeast portions of the state. It enters from Minnesota running concurrently with Interstate 94 (I-94) at Hudson, parallels the Interstate to Wisconsin Dells, and provides local access to cities such as Menomonie, Eau Claire, Black River Falls, Tomah and Mauston. It then provides an alternative route for traffic between northwestern Wisconsin and Madison and is the anchor route for the West Beltline Highway around Madison. Finally, it serves southeastern Wisconsin, connecting Madison with Whitewater, Elkhorn and Lake Geneva. The West Beltline Highway and the segment between Elkhorn and Lake Geneva are freeways, and the segment between Sauk City and Middleton is an expressway. The remainder of the road is a two-lane surface road or an urban multi-lane arterial. Between Hudson and west of Warrens, the road closely parallels the former main line of the Omaha Road, now operated by Union Pacific Railroad.

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Wikipedia