Interstate 39 (I-39) is a highway in the Midwestern United States. I-39 runs from Normal, Illinois at I-55 to Wisconsin Highway 29 (WIS 29) in Rib Mountain, Wisconsin, approximately six miles (9.7 km) southwest of Wausau. I-39 was designed to replace U.S. Route 51 (US 51), which in the early 1980s was one of the busiest two-lane highways in the United States. I-39 was built in the 1980s and 1990s. In Illinois, the route has a total length of 140.82 miles (226.63 km). In Wisconsin, I-39 has a distance of 182 miles (293 km). With the exception of an eight-mile (13 km) segment around Portage, the Interstate shares a route with at least one other route number in I-39's entirety. From Rockford to Portage, I-39 is concurrent with I-90. I-94 joins the pair in Madison until Portage. At 29 miles (47 km) in length, this concurrency of three Interstates is the longest in the country. From Portage northward, US 51 is co-signed with the Interstate and has exit numbers based on its mileage.
Interstate 43 (I-43) is a 191.55-mile-long (308.27 km) Interstate Highway located entirely within the U.S. state of Wisconsin, connecting I-39/I-90 in Beloit with Milwaukee and I-41, U.S. Highway 41 (US 41) and US 141 in Green Bay. Wisconsin Highway 32 (WIS 32) runs concurrently with I-43 in two sections and US 41, US 45, I-94, I-894, US 10, WIS 57, and WIS 42 overlap I-43 once each. There are no auxiliary or business routes connected to I-43; however, as of late 2015 there is a signed alternate route in Milwaukee County.
US Highway 141 (US 141) is a north–south United States Numbered Highway in the states of Wisconsin and Michigan. The highway runs north-northwesterly from an interchange with Interstate 43 (I-43) in Bellevue, Wisconsin, near Green Bay, to a junction with US 41/M-28 near Covington, Michigan. In between, it follows city streets in Green Bay and has a concurrent section with US 41 in Wisconsin. North of Green Bay, US 141 is either a freeway or an expressway into rural northern Wisconsin before downgrading to an undivided highway. In Michigan, US 141 is an undivided highway that runs through rural woodlands. The highway has two segments in each state; after running through Wisconsin for about 103 miles (166 km), it crosses into Michigan for approximately another eight miles (13 km). After that, it crosses back into Wisconsin for about 14 1⁄2 miles (23 km) before crossing the state line one last time. The northernmost Michigan section is about 43 1⁄2 miles (70 km), making the overall length about 169 miles (272 km).
U.S. Highway 151 (US 151) is a United States Numbered Highway that runs through the states of Iowa and Wisconsin. The southern terminus for US 151 is at a junction with Interstate 80 (I-80) in Iowa County, Iowa, and its northern terminus is at Manitowoc, Wisconsin. The route, from south to north follows a northeasterly path through the two states.
Interstate 894 (I-894) is a 9.3-mile (15.0 km) auxiliary Interstate Highway in Milwaukee County in the US state of Wisconsin. The route serves as a bypass of downtown Milwaukee, connecting with I-94 at the Zoo Interchange west of downtown and the Mitchell Interchange south of downtown. The route is concurrent with three other highways for its duration, following US Highway 45 (US 45) from the Zoo Interchange to Hale Interchange as the Zoo Freeway, where it separates from US 45 to follow I-43 heading east to the Mitchell Interchange as the Airport Freeway.
State Trunk Highway 29 is a state highway running east–west across central Wisconsin. It is a major east–west corridor connecting the Twin Cities and the Chippewa Valley with Wausau and Green Bay. A multi-year project to upgrade the corridor to a four-lane freeway or expressway from Elk Mound to Green Bay was completed in 2005. The expansion served to improve safety on the route, which was over capacity as a two-lane road. The remainder of WIS 29 is two-lane surface road or urban multi-lane road.
State Trunk Highway 16 is a Wisconsin state highway running from Pewaukee across the state to La Crosse. Much of its route in the state parallels the former mainline of the Chicago, Milwaukee, St. Paul and Pacific Railroad. The highway parallels Interstate 90 (I-90) or I-94 for most of its length in the state. It serves local traffic in nearby cities including La Crosse, Tomah, Wisconsin Dells, Portage, Columbus, Watertown, Oconomowoc and Waukesha. The highway is mainly two-lane surface road or urban multi-lane expressway from La Crosse to Oconomowoc, and it is a freeway east of Oconomowoc.
State Trunk Highway 11 is a state highway running east–west across southern Wisconsin. The highway connects Dubuque, Iowa with the cities of Janesville, Racine and Elkhorn. Most of the route is two-lane road with the exception of a freeway bypass of Monroe, a multilane bypass of Janesville, a section where it is concurrent with I-39 and I-90 and urban multilane highway in the greater Racine area.
State Trunk Highway 20 is a 42.95-mile (69.12 km) state highway in Walworth and Racine counties in southeastern Wisconsin, United States. The route is a short connector that bridges the city of Whitewater and points west via U.S. Highway 12 (US 12) with East Troy, Waterford and Racine. WIS 20 is a two-lane surface road with various four-lane roads within cities.
State Trunk Highway 42 is a state highway in the U.S. state of Wisconsin. It runs for about 138 miles (222 km) north–south in northeast Wisconsin from Sheboygan to the ferry dock in Northport. Much of the highway is part of the Lake Michigan Circle Tour from the eastern junction with U.S. Highway 10 (US 10) in Manitowoc to its junction with WIS 57 in Sister Bay. WIS 42 parallels I-43 from Sheboygan to Manitowoc, and parallels WIS 57 throughout much of the route, particularly from Manitowoc to Sturgeon Bay, meeting the northern terminus of WIS 57 in Sister Bay.
State Trunk Highway 50 is a 44.43-mile (71.50 km) state highway in Walworth and Kenosha counties in Wisconsin, United States, that runs from Wisconsin Highway 11 (WIS 11) in Delavan east to Wisconsin Highway 32 (WIS 32) in Kenosha. The highway is maintained by the Wisconsin Department of Transportation.
State Trunk Highway 164 is a Wisconsin state highway running from Slinger, around the city of Waukesha, to Waterford.
Wisconsin Highway 57 is a 191.82-mile-long (308.70 km) state highway Wisconsin, United States. It runs from its southern terminus at Wisconsin Highway 59 in Milwaukee to its northern terminus at Wisconsin Highway 42 in Sister Bay. Much of WIS 57 parallels Interstate 43 and WIS 42, particularly from Saukville to its northern terminus in Sister Bay. The highway is concurrent with I-43 for 12 miles (19 km) in Ozaukee County. Like most Wisconsin state highways, WIS 57 is maintained by the Wisconsin Department of Transportation (WisDOT).
State Trunk Highway 75 is a 12.10-mile (19.5 km) state highway in the southeastern part of U.S. state of Wisconsin. The highway runs from Wisconsin Highway 50 and Wisconsin Highway 83 in Paddock Lake north to Wisconsin Highway 20 east of Waterford. WIS 75 serves Kenosha and Racine Counties. The highway is maintained by the Wisconsin Department of Transportation.
State Trunk Highway 81 is a state highway in the U.S. state of Wisconsin. It runs east–west in southwest and south central Wisconsin from Beloit to Cassville. Between Brodhead and Monroe it run concurrently with WIS 11 for 13 miles (21 km). The route was originally designated as a state highway in the early 1920s, but there were three different designations along the route. It was not signed as WIS 81 along the entire route until 1934.
State Trunk Highway 83 is a state highway in the U.S. state of Wisconsin. It runs north–south in southeast Wisconsin from Hartford to the Illinois border near the town of Salem.
U.S. Highway 51 (US 51) in the U.S. state of Wisconsin runs north–south through the central part of the state. It enters from Illinois at Beloit, and runs north to its northern terminus in Hurley where it meets US 2. Much of the route of US 51 runs concurrently with Interstate 39 (I-39).
U.S. Highway 41 (US 41) is a north–south highway United States Numbered Highway in eastern Wisconsin. It runs from Pleasant Prairie on the Illinois border north to Marinette on the Michigan border. Most of the route is concurrent with Interstate 41 in the state, with the exception of the portion between Howard, a suburb of Green Bay, and Marinette.
US Highway 18 in the state of Wisconsin runs east–west across the southern part of the state. The highway serves as major connecting route between Madison and the southwest corner of the state. East of Madison, the route parallels Interstate 94 and serves as a local connection route to the communities along the interstate. US 18 enters Wisconsin at Prairie du Chien and ends in downtown Milwaukee at Lincoln Memorial Drive, across from the Milwaukee Art Museum.
Interstate 94 (I-94) runs east–west through the western, central and southeastern portions of the U.S. state of Wisconsin. A total of 348.23 miles (560.42 km) of I-94 lie in the state.
