Interstate 43, WisconsinRoads of the Mid-South & West > Highways of the State of Wisconsin > Interstate 43, Wisconsin

Interstate 43

Interstate 43 is a north-south highway that spends about half its life going east-west. This route runs from Green Bay to Beloit, via. Milwaukee. Originally, plans were for either I-57 or I-794 to run from Chicago to Green Bay. While planning got staled and Interstate 43 was designated between Green Bay and Milwaukee. Later the highway was extended to Beloit.

In Wisconsin, I-43 is multi-plexed.

I-43 is multi-plexed with...

...U.S. Rt. 45, at Greenfield.

...Interstate 41, at Milwaukee.
...Interstate 894, at Milwaukee.

...U.S. Rt. 41, at Milwaukee.

...Interstate 94, at Milwaukee.

...Wisconsin State Route 32, from Milwaukee to near Port Washington.

...Wisconsin State Route 57, from Milwaukee to near Fredonia.

...Wisconsin State Route 32, from near Port Washington to near Cedar Grove.

Interstates that I-43 crosses in Wisconsin.

Interstate 90, at Beloit.
Interstate 39, at Beloit.

NB I-39/90 at I-43.

NB I-43 at SB I-39/EB I-90.

NB I-43 at NB I-39/WB I-90.

A BGS on SB I-43 for I-39/90.

SB I-43 at NB I-39/WB I-90.

SB I-43 at SB I-39/EB I-90.

...Interstate 41, at Milwaukee.
Interstate 894, at Milwaukee.

BGS on SB I-43/WB I-894 in Greenfield.

BGS on SB I-43/WB I-894.

SB I-43/WB I-894 at their split in Greenfield.

A BGS on NB I-41/U.S. Rt. 41; SB I-43; WB I-894.

A BGS on NB I-41/U.S. Rt. 41; SB I-43; WB I-894.

NB I-41/U.S. Rt. 41; SB I-43; WB I-894 near the Hale Interchange.

Overhead guide markers on NB I-43/U.S. Rt. 45.

NB I-43/U.S. Rt. 45 at I-894.

Overhead sign on NB I-43.

A BGS on NB I-43 over one mile from I-894. (July, 2015)

NB I-43 near I-894. (July, 2015)

NB I-43 at I-894. (July, 2015)

...Interstate 41, at Milwaukee.
Interstate 94, at Milwaukee.
Interstate 894, at Milwaukee.

NB I-43/I-894 near I-94 in Milwaukee. (DEC. 2002)

NB I-43 at I-94 in Milwaukee. (DEC. 2002)

BGS on NB I-43/EB I-894. (Sept. 2003)

Overhead sign on NB I-43/EB I-894. (Sept. 2003)

NB I-43/EB I-894 at I-94/U.S. Rt. 41. (Sept. 2003)

SB I-43/EB I-94 one mile from I-41/894; U.S Rt. 41. (July, 2015)

SB I-43/EB I-94 under one mile from I-41/894; U.S. Rt. 41. (July, 2015)

SB I-43/EB I-94 near I-41/894; U.S. Rt. 41. (July, 2015)

SB I-43/EB I-94 at I-41/894; U.S. Rt. 41. (July, 2015)

A BGS on SB I-41/U.S. Rt. 41; NB I-43; EB I-894 over one mile from I-94. (July, 2015)

A BGS on SB I-41/U.S. Rt. 41; NB I-43; EB I-894 one mile from I-94. (July, 2015)

SB I-41/U.S. Rt. 41; NB I-43; EB I-894 under one mile from I-94. (July, 2015)

SB I-41/U.S. Rt. 41; NB I-43; EB I-894 near I-94. (July, 2015)

SB I-41/U.S. Rt. 41; NB I-43; EB I-894 at I-94. (July, 2015)
Interstate 94, at Downtown Milwaukee.

NB I-43 at WB I-94. (July, 2015)

Interstate 794, at Downtown Milwaukee.

NB I-43, WB I-94 near I-794 in Downtown Milwaukee. (DEC. 2002)

BGS on NB I-43/WB I-94/NB U.S. Rt. 41. (Sept. 2003)

NB I-43/WB I-94/NB U.S. Rt. 41 near I-794. (Sept. 2003)

NB I-43/WB I-94/NB U.S. Rt. 41 at the Marquette Interchange.

A BGS two miles from I-794 on NB I-43/WB I-94. (July, 2015)

NB I-43/WB I-94 three quarters of a mile from I-794. (July, 2015)

NB I-43/WB I-94 a quarter mile from I-794. (July, 2015)

NB I-43/WB I-94 at I-794. (July, 2015)

There are no branches on I-43 in Wisconsin.


The first indication the highway is ending on SB I-43.

SB I-43 at the end marker.

The southern end marker for I-43.

A sign on a mast on NB I-43 at I-39/90.

A BGS on SB I-39/EB I-90.

SB I-43 near Beloit.

NB I-43 north of I-39/90; WI St Rt 81.

NB I-43 near M.P. 2.

A guide marker on Rock County X.

A BGS on Rock County X.

A BGS on Rock County X.

NB I-43 near Darien.

NB I-43 near WI St Rt 67.

A BGS on SB U.S. Rt. 12.

NB I-43 in rural Waukesha County.

This is a junction sign on SB WI St Rt 83 in Mukwanago.

SB I-43 near New Berlin.

NB I-43 near Moorland Road.

NB I-43 near Sunny Slope in New Berlin.

NB I-43 at the Milwaukee/Waukesha County Line.

SB I-43 near Hales Corners.

NB I-43 at Layton Ave in Metro-Milwaukee.

SB I-43/U.S. Rt. 45 near WI St Rt 100 in Greenfield.

A BGS on NB I-43.

A BGS on NB I-43.

NB I-43 at WI St Rt 100.

A BGS on SB I-43/U.S. Rt. 45.

A guide marker in Greenfield.

A BGS on SB I-41/U.S. Rt. 41-45; EB I-894.

SB I-43 at I-41/894; U.S. Rt. 41/45.

SB I-41/U.S. Rt. 41; NB I-43; EB I-894 at 92nd Street in Greenfield.

SB I-41/U.S. Rt. 41; NB I-43; EB I-894 at 68th Street in Greenfield.

A guide marker in Greenfield.

A junction marker on SB WI St Rt 36.

A guide marker on Howard Ave.

Guide signs on NB I-43/EB I-894 in Milwaukee.

Guide markers in Greenfield.

Guide markers in Milwaukee.

A BGS on NB I-41/U.S. Rt. 41; WB I-94.

A BGS on NB I-41/U.S. Rt. 41; WB I-94.

WB I-94, NB I-43 north of I-894.

NB I-43/WB I-94 north of I-41/894; U.S. Rt. 41.

A BGS on NB I-43/WB I-94.

WB I-94, NB I-43 in Milwaukee.

NB I-43/WB I-94 south of Howard Ave.

NB I-43/WB I-94 at Howard Ave.

NB I-43/WB I-94 north of Howard Ave.

NB I-43/WB I-94 south of Becher Street.

NB I-43/WB I-94 at Becher Street.

NB I-43/WB I-94 south of National Ave.

NB I-43/WB I-94 near Downtown Milwaukee.

NB I-43/WB I-94 south of I-794.

NB I-43 at the Marquette Interchange.

A BGS on EB I-94.

A set of old guide markers on Wisconsin Ave in Downtown Milwaukee. (October, 2004)

A guide marker on WI St Rt 57/167.

A guide marker on Ozaukee County Highway C.

A guide marker along I-43.
Photo from: Paul Dienhart


3 February 2016