State Trunk Highway 30 is a state highway in the U.S. state

U.S. state

A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of Wisconsin

Wisconsin

Wisconsin is a U.S. state located in the north-central United States and is part of the Midwest. It is bordered by Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michigan to the east, Michigan to the northeast, and Lake Superior to the north. Wisconsin's capital is...

. It runs east–west in suburban Madison

Madison, Wisconsin

Madison is the capital of the U.S. state of Wisconsin and the county seat of Dane County. It is also home to the University of Wisconsin–Madison....

 as a connector freeway. This section is all that remains of the highway that stood as of 1964 after I-94

Interstate 94

Interstate 94 is the northernmost east–west Interstate Highway, connecting the Great Lakes and Intermountain regions of the United States. I-94's western terminus is in Billings, Montana at a junction with Interstate 90; its eastern terminus is the U.S...

 was commissioned. This is the second alignment of the route number - the first beginning in Platteville

Platteville, Wisconsin

Platteville is the largest city in Grant County in southwestern Wisconsin. The population was 11,224 at the 2010 census, growing 12% since the 2000 Census. Much of this growth is likely due to the enrollment increase of the University of Wisconsin–Platteville...

 and ending in Readstown.

Route description

WIS 30 is a freeway for its entire length and lies completely within the city of Madison. It junctions with US 151 at a folded diamond interchange. West of the terminus, the road becomes Aberg Avenue which provides a shortcut to WIS 113 north. WIS 30 has two interchanges between termini, one at Stoughton Road (US 51) and a half-diamond at North Thompson Drive. The Thompson Drive interchange features roundabouts at the ramp junctions with the crossing street. WIS 30 ends at its junction with Interstates 39, 90 and 94 at what is commonly known as the Badger Interchange. The interchanges are not numbered.

History

From 1924 until the completion of I-94

Interstate 94

Interstate 94 is the northernmost east–west Interstate Highway, connecting the Great Lakes and Intermountain regions of the United States. I-94's western terminus is in Billings, Montana at a junction with Interstate 90; its eastern terminus is the U.S...

 between Madison

Madison, Wisconsin

Madison is the capital of the U.S. state of Wisconsin and the county seat of Dane County. It is also home to the University of Wisconsin–Madison....

 and Milwaukee

Milwaukee, Wisconsin

Milwaukee is the largest city in the U.S. state of Wisconsin, the 28th most populous city in the United States and 39th most populous region in the United States. It is the county seat of Milwaukee County and is located on the southwestern shore of Lake Michigan. According to 2010 census data, the...

, WIS 30 ran from the Wisconsin

Wisconsin

Wisconsin is a U.S. state located in the north-central United States and is part of the Midwest. It is bordered by Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michigan to the east, Michigan to the northeast, and Lake Superior to the north. Wisconsin's capital is...

 state capitol to Wisconsin Avenue in downtown Milwaukee

Milwaukee, Wisconsin

Milwaukee is the largest city in the U.S. state of Wisconsin, the 28th most populous city in the United States and 39th most populous region in the United States. It is the county seat of Milwaukee County and is located on the southwestern shore of Lake Michigan. According to 2010 census data, the...

, along with WIS 19

Highway 19 (Wisconsin)

State Trunk Highway 19 is a state highway in the U.S. state of Wisconsin. It provides a more direct route from U.S. Highway 14 near Mazomanie east to Highway 16 at Watertown, passing around the north side of Madison. WIS 19 is a local connector route that links the communities of Waunakee, Sun...

. The route of WIS 30 had several different alignments during that time, all which generally parallel the current routing of I-94

Interstate 94

Interstate 94 is the northernmost east–west Interstate Highway, connecting the Great Lakes and Intermountain regions of the United States. I-94's western terminus is in Billings, Montana at a junction with Interstate 90; its eastern terminus is the U.S...

.

WIS 30 was the main route between the two largest cities in the state until I-94

Interstate 94

Interstate 94 is the northernmost east–west Interstate Highway, connecting the Great Lakes and Intermountain regions of the United States. I-94's western terminus is in Billings, Montana at a junction with Interstate 90; its eastern terminus is the U.S...

's completion in the late 1960s.

Interchanges

County	Location	Mile	# Exit number An exit number is a number assigned to a road junction, usually an exit from a freeway. It is usually marked on the same sign as the destinations of the exit, as well as a sign in the gore....	Destinations	Notes
ends - road continues to Waunakee as north
Dane Dane County, Wisconsin As of the census of 2000, there were 426,526 people, 173,484 households, and 100,794 families residing in the county. The population density was 355 people per square mile . There were 180,398 housing units at an average density of 150 per square mile...	Madison Madison, Wisconsin Madison is the capital of the U.S. state of Wisconsin and the county seat of Dane County. It is also home to the University of Wisconsin–Madison....	0.5		US 151 - Washington Ave
		1.0		US 51 - Stoughton Rd
		1.9		North Thompson Dr
		2.6		I-39, I-90 - Chicago
		2.8		I-39, I-90, I-94 - Wis Dells Wisconsin Dells, Wisconsin Wisconsin Dells is a city in south-central Wisconsin, with a population of 2,418 as of the 2000 census. It straddles four counties: Adams, Columbia, Juneau, and Sauk. The city takes its name from the dells of the Wisconsin River, a scenic, glacially formed gorge that features striking sandstone...
ends - road continues to Milwaukee as east