Interstate 39 (I-39) is a highway in the Midwestern United States. I-39 runs from Normal, Illinois, at I-55 to State Trunk Highway 29 (WIS 29) in the town of Rib Mountain, Wisconsin, which is approximately six miles (9.7 km) south 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.
U.S. Highway 8 (US 8) is a United States Numbered Highway that runs primarily east–west for 280 miles (451 km), mostly within the state of Wisconsin. It connects Interstate 35 (I-35) in Forest Lake, Minnesota, to US 2 at Norway in the Upper Peninsula of Michigan near the border with Wisconsin. Except for the short freeway segment near Forest Lake, a section near the St. Croix River bridge, the interchange with US 51, and a three-mile (4.8 km) stretch west of Rhinelander, Wisconsin, it is mostly an undivided surface road. As a state highway in the three states, US 8 is maintained by the Minnesota, Wisconsin and Michigan departments of transportation.
U.S. Route 51 or U.S. Highway 51 is a major south–north United States highway that extends 1,277 miles (2,055 km) from the western suburbs of New Orleans, Louisiana, to within 150 feet (46 m) of the Wisconsin–Michigan state line. As most of the United States Numbered Highways ending with "1", it is a cross-country north–south route extending from the Gulf Coast region to the Great Lakes region. Much of the highway in northern Illinois and southern Wisconsin runs parallel to or is cosigned with Interstate 39 (I-39) and much of the route in several states also parallels the Illinois Central Railroad. From LaPlace, Louisiana, Mississippi, to Memphis, Tennessee, much of that portion of US 51 runs largely parallel or is concurrent with Interstate 55 (I-55). The highway's northern terminus is between Hurley, Wisconsin, and Ironwood, Michigan, where it ends with a Trumpet interchange at US 2. Its southern terminus is in Laplace, Louisiana, ending at US 61. US 51 is routed through the states of Louisiana, Mississippi, Tennessee, Kentucky, Illinois, and Wisconsin.
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 Milwaukee Road and current mainline of the Canadian Pacific Railway. Interstate 90 (I-90) or I-94 parallels Highway 16 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 an expressway bypass of Monroe, a multilane bypass of Janesville, a section where it is concurrent with I-39 and I-90, a combined freeway/divided highway bypass of Burlington to the south, where it is partially concurrent with WI 36 and WI 83, and urban multilane highway in the greater Racine area.
State Trunk Highway 17 is a state highway in the U.S. state of Wisconsin. The highway is a secondary route in northeastern Wisconsin that directly connects Rhinelander, Eagle River and the central and eastern parts of Michigan's Upper Peninsula with Wausau, Wisconsin and points south and west.
State Trunk Highway 30 is a state highway in the U.S. state of Wisconsin. It runs east–west in suburban Madison as a connector freeway between Interstate 39, Interstate 90, and Interstate 94 at the Badger Interchange to US 151 east of Downtown Madison. This section is all that remains of the highway that stood as of 1964 after I-94 was commissioned. This is the second alignment of the route number - the first beginning in Platteville and ending in Readstown.
State Trunk Highway 76 is a state highway in the U.S. state of Wisconsin. It runs north–south in east central Wisconsin from US Highway 45 near Bear Creek to a junction with US Highway 45 in downtown Oshkosh.
State Trunk Highway 77 is a state highway in the U.S. state of Wisconsin. It runs east–west in northwest Wisconsin from the Minnesota border near Danbury to the Michigan border in Hurley. The highway was first designated in 1920 and was extended to the current routing sometime between 1948 and 1956.
State Trunk Highway 91 is a state highway in the U.S. state of Wisconsin. It runs east–west in east-central Wisconsin from near Berlin to Oshkosh.
State Trunk Highway 104 is a state highway in the US state of Wisconsin. It runs in a north–south direction in south central Wisconsin from Brodhead to Brooklyn. It was first designated in 1919–1920 before being rerouted in 1923–1926 and extended in 1999.
State Trunk Highway 138 is a state highway in the U.S. state of Wisconsin. It runs west–east between Oregon and Stoughton and north–south between Stoughton and Cooksville.
State Trunk Highway 146 is a state highway in the U.S. state of Wisconsin. It runs north–south in central Wisconsin from Fall River to Cambria. It was designated in between 1923 and 1925.
U.S. Highway 18 (US 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 is paralleled by Interstate 94 (I-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.
State Trunk Highway 43 was a number assigned to two different state highways in the U.S. state of Wisconsin:
State Trunk Highway 45 was a number assigned to two different state highways in the U.S. state of Wisconsin:
The Wisconsin State Trunk Highway System is the state highway system of the U.S. state of Wisconsin, including Wisconsin's segments of the Interstate Highway System and the United States Numbered Highway System, in addition to its other state trunk highways. These separate types of highways are respectively designated with an I-, US, or STH- prefix. The system also includes minor roads designated as Scenic Byways, four routes intended to promote tourism to scenic and historic areas of the state; and as Rustic Roads, lightly traveled and often unpaved local roads which the state has deemed worthy of preservation and protection. The state highway system, altogether totaling 11,753 miles (18,915 km) across all of Wisconsin's 72 counties, is maintained by the Wisconsin Department of Transportation (WisDOT).
State Trunk Highway 135 (WIS 135) was a state highway in the U.S. state of Wisconsin. At its latest routing, it traveled from WIS 59 in Palmyra to WIS 106 near Hebron.
Several special routes exist for U.S. Route 51.
