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.
A concurrency in a road network is an instance of one physical roadway bearing two or more different route numbers. When two roadways share the same right-of-way, it is sometimes called a common section or commons. Other terminology for a concurrency includes overlap, coincidence, duplex, triplex, multiplex, dual routing or triple routing.
A county highway is a road in the United States and in the Canadian province of Ontario that is designated and/or maintained by the county highway department. Route numbering can be determined by each county alone, by mutual agreement among counties, or by a statewide pattern.
A supplemental route is a state secondary road in the U.S. state of Missouri, designated with letters. Supplemental routes were various roads within the state which the Missouri Department of Transportation was given in 1952 to maintain in addition to the regular routes, though lettered routes had been in use from at least 1932. The four types of roads designated as Routes are:
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 36 is a state highway in the U.S. state of Wisconsin. It runs in a diagonal southwest–northeast direction across southeastern Wisconsin from Springfield which is north of Lake Geneva to Milwaukee.
State Trunk Highway 42 is a state highway in the U.S. state of Wisconsin. It runs for 135 miles (217 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 66 is a state highway in the U.S. state of Wisconsin. It runs east–west in central Wisconsin from Rosholt to Stevens Point and along what used to be County Trunk Highway P (CTH-P) to Wisconsin Rapids. The entire length of this highway is designated the Polish Heritage Highway.
State Trunk Highway 70 is a state highway in the U.S. state of Wisconsin. It runs east–west in northern Wisconsin from a shared terminus with WIS 101 at US Highway 2 (US 2) and US 141 near Florence to a connection with Minnesota State Highway 70 (MN 70) at the St. Croix River five miles (8.0 km) west of Grantsburg in Burnett County. It serves the communities of Grantsburg, Siren, Spooner, and the resort areas of Minocqua, Woodruff and Eagle River along its route. WIS 70 is the third-most northern route to almost completely cross Wisconsin, stretching from Minnesota to within four miles (6.4 km) of the Michigan border.
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 Cassville to Beloit. 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 87 is a state highway in Polk and Burnett counties in the US state of Wisconsin that runs north–south in the northwestern portion of the state from St. Croix Falls to Grantsburg. It was first designated as a state highway in 1924.
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 113 is a state highway in the U.S. state of Wisconsin. It runs in north–south in south central Wisconsin from Madison to Baraboo, following the Chicago and North Western Railway. The highway uses the Merrimac Ferry, the last ferry in the Wisconsin state highway system, to cross the Wisconsin River at Merrimac. Over the length of the road, it runs through Dane, Columbia, and Sauk counties.
State Trunk Highway 136 is a state highway in the U.S. state of Wisconsin. It runs east–west in southwest Wisconsin from near Reedsburg to Baraboo. The route was first designated in 1917 but not as WIS 136 until 1935. The route was extended in 2017.
State Trunk Highway 153 is a 61.25 miles (98.57 km) state highway in Marathon and Shawano counties in central Wisconsin, United States, that runs in east–west from Spencer to Tigerton, passing through Mosinee and Stratford. The highway was originally designated in 1925 between WIS 97 in Stratford and WIS 10 in Mosinee. It was extended west to its present western terminus and east to WIS 49 in 1947. It was extended again to its present eastern terminus in the early 1960s.
State Trunk Highway 167 is a 24.96-mile (40.17 km) state highway in southern Washington and Ozaukee counties in the US state of Wisconsin. It runs east–west in the southeastern part of the state from Hartford to Mequon and runs concurrently with Interstate 41/US Highway 41/US Highway 45 (I-41/US 41/US 45) in Germantown. The highway was first numbered west of then-US 41 between 1939 and 1944 then extended to Mequon between 1948 and 1956. It initially had a concurrency with WIS 145 but was rerouted to its current one with I-41/US 41/US 45 in 1983.
State Trunk Highway 171 is a state highway in the U.S. state of Wisconsin. It runs east–west in southwest Wisconsin from near Ferryville to Boaz. A section of the route was initially designated as WIS 131 in 1924, but it was not signed as WIS 171 until sometime between 1948 and 1956, when the highway was extended east to US 14 near Boaz.
State Trunk Highway 441, and also called the Tri-County Expressway or Highway 441 is a state highway in the US state of Wisconsin. Together with Interstate 41/US Highway 41 (I-41/US 41), the highway forms a beltway around the greater Appleton area, and is a freeway for the entire length of its route. It connects at both ends to its parent highway, I-41/US 41. It runs east–west and north–south in east central Wisconsin from near Neenah around Appleton to near Little Chute through Winnebago, Outagamie and Calumet counties. The Roland Kampo Memorial Bridge spans Little Lake Butte des Morts near the highway's southwest terminus.
An unsigned highway is a highway that has been assigned a route number, but does not bear road markings that would conventionally be used to identify the route with that number. Highways are left unsigned for a variety of reasons, and examples are found throughout the world. Depending on the policy of the agency that maintains the highway, and the reason for not signing the route, the route may instead be signed a different designation from its actual number, with small inventory markers for internal use, or with nothing at all.
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).
