Interstate 39

Route information
Length	323 mi (520 km)
Major junctions
South end	I-55 / US 51 in Normal, IL
Major intersections	I-80 near La Salle, IL I-88 near Rochelle, IL I-90 near Rockford, IL I-43 near Beloit, WI I-94 near Madison, WI I-90 / I-94 near Portage, WI
North end	US 51 / WIS 29 in Rothschild, WI

Interstate 39 (I-39) is an interstate highway in the midwestern United States. I-39 runs from Normal, Illinois at Interstate 55 to Highway 29 in Rothschild, Wisconsin, approximately six miles south of Wausau, Wisconsin.

Interstate 39 is primarily used as a long-distance bypass for commercial vehicles around Chicago and was built in the 1980s and 1990s. Industries in Minneapolis, Eau Claire and other northern-tier cities may exchange goods with more southerly cities such as Cincinnati, Louisville and Indianapolis (via Interstate 74) without routing traffic through congestion-plagued Chicago.

As of 2008, Interstate 39 has no spur routes, nor are any planned.

Route description

Lengths

	mi	km
IL	141	227
WI	182	293
Total	323	520

Major cities> Bolded cities are officially-designated control cities for signs
Bloomington-Normal, Illinois La Salle-Peru, Illinois Rockford, Illinois Beloit, Wisconsin Janesville, Wisconsin Madison, Wisconsin Wausau, Wisconsin

Illinois

Main article: Interstate 39 in Illinois

In the state of Illinois, Interstate 39 runs from Interstate 55 north of the Bloomington-Normal, Illinois area alongside of Illinois 251. Interstate 39 joins I-90 near Rockford in the town of Cherry Valley and continues north to the Wisconsin state line as part of the Jane Addams Memorial Tollway. The only toll booth is located at South Beloit where $1.00 is collected from every automobile. ($.50 for those with I-Pass transponders).

Wisconsin

Main article: Interstate 39 in Wisconsin

Interstate 39, along with U.S. 51, in northern Wisconsin

I-39 enters Wisconsin with I-90 near Beloit and heads north. At Madison, I-39/90 is joined by I-94. I-39/90/94 from Madison to just south of Portage is the longest three-Interstate concurrency in the United States. I-39 departs at Portage heading north, almost entirely with U.S. Highway 51 and ends just south of Wausau, with the U.S. 51 freeway continuing north.

Major intersections

• Interstate 55 in Normal, Illinois
• Interstate 80 in La Salle, Illinois
• 20px Interstate 88 in Rochelle, Illinois
• Interstate 90 in Rockford, Illinois. They stay joined until Portage, Wisconsin
• Interstate 43 in Beloit, Wisconsin
• Interstate 94 in Madison, Wisconsin. They stay joined for 30 miles (48 km).

External links

• Illinois Highway Ends: Interstate 39

Browse numbered routes
← IL 38	IL	→
← WIS 38	WI	→ WIS 39