I-41

About I-41

Also known as Lake Michigan to Lake Winnebago corridor.

From Illinois state line (I-94) to Green Bay, WI (I-43)

Interstate 41 is a north-south route running about 175 miles from the Illinois state line near the Wisconsin community of Russell north to Green Bay, Wisconsin. It enters Wisconsin as a continuation of US 41 from Illinois, passes through the western and southern fringes of the Milwaukee metropolitan area, and then turns north toward the Fox River Valley. The corridor links several of the most populated parts of eastern Wisconsin in a single numbered route.

Through the Milwaukee region the route runs concurrently with other Interstates, sharing pavement with I-894 and I-94 across the southern and western parts of the metro area before splitting away to continue north on its own. North of Milwaukee it follows the older US 41 alignment through Washington and Fond du Lac counties, skirts the western shore of Lake Winnebago, and serves the Oshkosh and Appleton areas. The northern third of the route ties together the Fox Cities before reaching Green Bay.

The road carries a mix of commuter, freight, and intercity traffic, connecting the manufacturing and paper-industry centers of the Fox River Valley with the larger Milwaukee economy to the south. Because it overlaps with the long-established US 41, the Interstate designation was added to a route that already functioned as a freeway for most of its length.

State-by-state mileage

State	Miles
Illinois	0.9
Wisconsin	174.1
Total	175

History

Interstate 41 was approved by AASHTO and signed in 2015, making it one of the newer two-digit Interstate designations. It was applied to an existing freeway corridor formed mostly by US 41 and portions of older Interstate routing around Milwaukee, rather than built as new highway.

Major cities and places

Notable features

• Lake Winnebago shoreline

Did you know

• Designated in 2015 along the existing US 41 and Milwaukee freeway corridors.
• Runs concurrently with I-94 and I-43 through parts of the Milwaukee area.
• Serves the Fox Cities region of Appleton, Neenah, and Oshkosh.
• Entirely within Wisconsin despite beginning at the Illinois state line.