Interstate 43 in Wisconsin


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End Green Bay
Length 191 mi
Length 308 km
  • 1 → Chicago / Minneapolis2 Hart Road
  • 6 Clinton
  • 15 Darien
  • 17 Delavan
  • 21 Delavan
  • 25 Elkhorn
  • 27 → Lake Geneva
  • 29 State Route 11
  • 33 Troy
  • 36 East Troy
  • 38 East Troy
  • 43 Mukwonago
  • 50 Big Bend
  • 54 Muskego
  • 57 New Berlin
  • 59 Layton Avenue
  • 4 → Milwaukee Bypass
  • 5 Forest Home Avenue
  • 6 60th Street
  • 8 Loomis Road
  • 10 → Chicago
  • 314 Howard Avenue
  • 314A Holt Avenue
  • 312 Bay Street
  • 311 National Avenue
  • 72A → Madison / Downtown
  • 72B Downtown Milwaukee
  • 73A Fond Du Lac Avenue
  • 73B Halyard Street
  • 74 Locust Street
  • 75 Keefe Avenue
  • 76 Capitol Drive
  • 77 Hampton Avenue
  • 78 Silver Spring Drive
  • 80 Good Hope Road
  • 82 Brown Deer Road
  • 83 County Line ROad
  • 85 Mequon Road
  • 89 Pioneer Road
  • 92 Grafton
  • 93 Port Washington
  • 96 Saukville
  • 97 Fredonia
  • 100 Port Washington
  • 107 Belgium
  • 113 Cedar Grove
  • 116 Oostburg
  • 120 South Sheboygan
  • 123 Sheboygan Falls
  • 126 Sheboygan
  • 128 North Sheboygan
  • 137 Cleveland
  • 144 St. Nazianz
  • 149 Manitowoc
  • 152 Manitowoc
  • 154 Whitelaw
  • 157 Francis Creek
  • 160 Kellnersville
  • 164 Maribel
  • 171 Denmark
  • 178 Green Bay
  • 180 → Green Bay
  • 181 Manitowoc Road
  • 183 Mason Street
  • 185 Sturgeon Bay Road
  • 187 Shore Drive
  • 189 Atkinson Drive
  • 192 → Appleton / Marinette

Interstate 43 or I -43 is an Interstate Highway in the United States, located entirely in the state of Wisconsin. The highway runs from Beloit in the south, via the largest city of Milwaukee along Lake Michigan to Green Bay. Interstate 43 is 308 kilometers long.

  • Features what is the best time to travel to the state of Wisconsin.

Travel directions

I-43 at Milwaukee.

I-43 at Green Bay.

Southern Wisconsin

Interstate 43 begins in Beloit, the border town with Illinois, at Interstate 90, which runs from Madison to Chicago. The highway runs northeast through the Wisconsin countryside and has 2×2 lanes. At Darien you cross the US 14, the main road between Chicago and Madison. In Elkhorn one crosses US 12, a short highway from Chicago to Madison, more or less parallel to US 14. The countryside is slightly hilly, the road network is not a grid pattern as seen in other states in the Midwest. There is also quite a lot of forest in this part of Wisconsin, through which the I-43 runs regularly. This part of Wisconsin is also fairly densely populated, with frequent small towns.

  • FINDJOBDESCRIPTIONS: Weather by month for the state of Wisconsin, covering average temperatures for all 12 months.


The first suburb of Milwaukee is New Berlin, a sparsely built suburb with 35,000 inhabitants. The road surface is very bad in some parts. Milwaukee’s suburbs consist of spacious detached homes, surrounded by greenery, resulting in low building density. In Greenfield , one crosses Interstate 894, Milwaukee ‘s western bypass. From here, the highway has 2×3 lanes, and the road is known as the Rock Freeway. You get a little closer to Milwaukee itself, and the residential areas are a little more built-up here too. In Greenfield you pass an unfinished junction.

In south Milwaukee, I-43 merges with Interstate 94, the highway to Chicago. Here too, 2×3 lanes are available. One turns north here, and crosses Milwaukee. The highway is sunken at first, but later crosses the Menomonee River with a large viaduct. There are 4+3 lanes available here. At the Marquette Interchange, I-94 turns west to Madison and Minneapolis, and east is Interstate 794, a short highway along Lake Michigan. One passes right past downtown Milwaukee.

North of the center you return to the residential areas, and 2×3 lanes are available. The highway is deepened here. The highway here runs about a mile from Lake Michigan. Already in northern Milwaukee, the highway narrows to 2×2 lanes. After Milwaukee one enters the suburb of Mequon, a large suburb in area, but thinly built, so that the population does not exceed 24,000. The people here all have large houses with large gardens around them. The last suburb is Grafton

Lake Michigan Shore

North of Milwaukee, the highway runs close to the shore of Lake Michigan, one of the great lakes of the United States. Signs of Dutch immigration are visible here, the highway passes by Oostburg. The first major city north of Milwaukee is Sheboygan, a city of 51,000 residents on Lake Michigan. The highway then runs due north across the countryside. The second somewhat larger city is Manitowoc, with 34,000 inhabitants, also on Lake Michigan. After Manitowoc, the road turns further away from Lake Michigan, and you arrive at Green Bay, a city of 100,000 inhabitants. One crosses SR-172, a highway south of Green Bay. At the north end of Green Bay, the highway ends at US 41, an alternate highway between Milwaukeeand Green Bay.



The original Interstate Highways program provided only two routes in Wisconsin, I-90 and I-94. In 1953, a request was made to add a third route between Milwaukee and Green Bay, but this was rejected. In 1963, a plan was proposed by the Wisconsin Turnpike Commission to build a toll road from Milwaukee to Superior. Ultimately, only the southern portion between Milwaukee and Green Bay was approved.

The plan proposed the number Interstate 57, which would then have to be extended northward through the Chicago area, with a long double numbering with I-94 between Chicago and Milwaukee. This was ultimately rejected. When construction began on the highway in 1963, it was numbered US 141.

In 1973, an application was made for an Interstate Highway between Beloit and Milwaukee, but it was rejected. This section was originally constructed as State Route 15. I-43 was not assigned to the route until 1988, and the first signposts with this number appeared the following year.

Rock Freeway

The highway between Beloit and Milwaukee was constructed between 1966 and 1976. In 2019-2021, the interchange with I-39/94 at Beloit was reconstructed from a cloverleaf to a interchange with flyovers. On November 10, 2021, the longest flyover for traffic from Milwaukee to Rockford opened to traffic.

Airport Freeway

In 1966, the Airport Freeway section in south Milwaukee opened to traffic.

North – South Freeway

The first section of the North – South Freeway in Milwaukee opened in 1963 to traffic between Exits 76 and 80 in the north of the city. In 1964 this section was extended 1.5 kilometers south to just north of downtown. In 1966, the portion that is double-numbered with I-94 opened in south Milwaukee. In early 1969, the immense Marquette Interchange opened in downtown Milwaukee, where I-43 exits from I-94. This completed I-43 through Milwaukee.

Milwaukee – Green Bay

The highway between Milwaukee and Green Bay was completed in 1981.

Traffic intensities

17,000 to 19,000 vehicles drive daily between Beloit and the Milwaukee region, rising to 40,000 vehicles near Waukesha. Through south Milwaukee, 133,000 vehicles on the dual-number I-41 and 123,000 to 157,000 vehicles on the dual-numbered I-94 south of downtown Milwaukee. About 100,000 vehicles per day pass through the northern suburbs, dropping to 50,000 vehicles at Port Washington and 20,000 vehicles between Sheboygan and Manitowoc. This remains stable at 20,000 vehicles between Manitowoc and Green Bay, rising to 35,000 vehicles in Green Bay.

Lane Configuration

From Unpleasant Lanes Comments
Exit 0 exit 61 2×2
exit 61 Exit 72 2×3 Milwaukee
Exit 72 Exit 73 4+3 Milwaukee
Exit 73 exit 80 2×3 Milwaukee
Exit 80 Exit 192 2×2

Interstate 43 in Wisconsin

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