Interstate 90 in Wisconsin

This article is about the section of Interstate 90 in Wisconsin. For the entire route, see Interstate 90.

Interstate 90 (I-90) runs east–west through the western, central and southern portions of the U.S. state of Wisconsin. About 187 miles (301 km) of I-90 lie in the state.

Interstate 90
I-90 highlighted in red
Route information
Maintained by WisDOT
Length	187.13 mi[1] (301.16 km)
NHS	Entire route
Major junctions
West end	I-90 at Minnesota state line
Major intersections	US 53 in La Crosse I-94 in Tomah I-39 in Portage US 51 in Madison US 151 in Madison I-94 in Madison US 12 / US 18 in Madison US 14 in Janesville I-43 in Beloit
East end	I-39 / I-90 at Illinois state line
Location
Country	United States
State	Wisconsin
Counties	La Crosse, Monroe, Juneau, Sauk, Columbia, Dane, Rock
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Wisconsin State Trunk Highway System Interstate US State Scenic Rustic
← WIS 89 → WIS 91

All 187 miles of I-90 in Wisconsin have a speed limit of 70 mph.^{[citation needed]}

Route description

The highway enters from Minnesota over the Mississippi River just northwest of La Crosse. The freeway passes north of La Crosse and south of Onalaska as it heads towards Tomah. Once there, it joins I-94. The two Interstates run concurrently for the next 91.76 miles (147.67 km) to Madison. The highway collects Interstate 39, 63 miles (101 km) southeast of Tomah (near Portage). This concurrency of about 30 miles (48 km) is one of only three triplex concurrencies of the Interstate Highway System existence, the other two being in both Milwaukee and Indianapolis. I-39 continues along I-90 for the remaining 78 miles (126 km) in Wisconsin.

I-94 breaks away eastward toward Milwaukee at what is commonly known as the Badger Interchange, where the three Interstates meet with WIS 30. The remaining routes continue south to Janesville and Beloit before exiting the state.

I-90 Mississippi River Bridge near La Crosse

I-90 and I-94 junction near Tomah

History

In 1959, I-90 was extended north from Rockton Road, the Northwest Tollway's (now Jane Addams Memorial Tollway's) northern terminus, in Illinois to US 14 near Janesville, Wisconsin.^[2][3][4][5] In 1961, another section of I-90 was opened. This section ran from US 12/US 18 (later moved slightly southward) near Madison to US 12/US 16 (now US 12/WIS 16) near Wisconsin Dells.^[6][7] In 1962, a connection between both opened sections opened to traffic.^[7][8] In 1964, I-90 was extended northwestward to US 12/US 16 (now US 12/WIS 16) near Tomah.^[9][10]

The Dresbach Bridge, spanning the Mississippi River west of La Crosse, was dedicated and opened to traffic on October 12, 1967.^[11] By 1969, another separate section of I-90 was opened, traveling from the Minnesota state line to US 16 (now WIS 16) near La Crosse.^[12][13] Later, both opened sections were then connected together.^[13][14]

The Dresbach Bridge was replaced by the states of Minnesota and Wisconsin in 2016 under the former's program to replace outdated bridge designs following the 2007 I-35W bridge collapse. The old bridge was closed in April 2016 and the new structure opened in October.^[15]

Starting in 2015, the 45-mile (72 km), southernmost section of I-39/I-90 (from US 12/US 18 to the Illinois state line) underwent a major reconstruction project. This involved widening the corridor to six lanes (eight lanes in the Janesville area) and reconfiguring all interchanges, including the I-43/WIS 81 interchange. The overall project was completed in 2021.^[16]

Exit list

County	Location	mi[1]	km	Exit	Destinations	Notes
Mississippi River		0.00	0.00		I-90 west – Rochester, Albert Lea	Continuation into Minnesota
				I-90 Mississippi River Bridge
La Crosse	Town of Campbell	1.96	3.15	2	CTH-B – French Island	Access to La Crosse Regional Airport
	La Crosse	2.87	4.62	3	US 53 south / WIS 35 (Alt. I-90) – La Crosse, Onalaska	Western end of US 53 concurrency
	Onalaska	4.43	7.13	4	US 53 north / WIS 157 – La Crosse, Onalaska	Eastern end of US 53 concurrency
		5.74	9.24	5	WIS 16 – Onalaska, West Salem
	Town of Hamilton	11.78	18.96	12	CTH-C – West Salem
	Bangor	15.57	25.06	15	WIS 162 – Bangor, Coon Valley
Monroe	Sparta	24.91	40.09	25	WIS 27 – Sparta, Melvina
	Town of Angelo	28.18	45.35	28	WIS 16 – Sparta
	Town of Tomah	41.42	66.66	41	WIS 131 – Tomah, Wilton
	Tomah	43.32	69.72	43	US 12 / WIS 16 – Tomah
	Town of Oakdale	45.10	72.58	45	I-94 west – Eau Claire, St. Paul	Western end of I-94 concurrency; I-94 exit 147
	Oakdale	48.60	78.21	48	CTH-PP – Oakdale
Juneau	Camp Douglas	55.03	88.56	55	CTH-C – Camp Douglas, Volk Field
	New Lisbon	61.46	98.91	61	WIS 80 – New Lisbon
	Town of Lemonweir	69.02	111.08	69	WIS 82 – Mauston, Oxford
	Lyndon Station	78.97	127.09	79	CTH-HH – Lyndon Station
	Town of Lyndon	85.40	137.44	85	US 12 / WIS 16 – Wisconsin Dells
Sauk	Wisconsin Dells	87.22	140.37	87	WIS 13 north – Wisconsin Dells
	Lake Delton	89.80	144.52	89	WIS 23 – Lake Delton, Reedsburg
	Town of Delton	93.13	149.88	92	US 12 – Baraboo, Lake Delton	US 12 exit 211
Columbia	Town of Caledonia	105.73	170.16	106	WIS 33 – Portage, Baraboo
		108.16– 108.59	174.07– 174.76	108A	WIS 78 south – Merrimac
				108B	I-39 north – Wausau	Western end of I-39 concurrency
	Town of Dekorra	115.21	185.41	115	CTH-CS – Poynette, Lake Wisconsin
	Town of Arlington	119.20	191.83	119	WIS 60 – Lodi, Arlington
Dane	Town of Vienna	126.25	203.18	126	CTH-V – Dane, DeForest
	Community of Windsor	130.46	209.96	131	WIS 19 – Waunakee, Sun Prairie
	Town of Burke	131.98	212.40	132	US 51 – Madison, DeForest
	Madison	135.21– 135.24	217.60– 217.65	135A	US 151 south – Madison	US 151 exit 97
				135B	US 151 north – Sun Prairie
		135.45	217.99	135C	High Crossing Boulevard	Westbound exit and eastbound entrance
		137.24	220.87	138A	I-94 east – Milwaukee	Eastern end of I-94 concurrency; left exit and entrance eastbound; I-94 exit 240
		137.59	221.43	138B	WIS 30 west – Madison	Left exit and entrance westbound; serves Dane County Airport; WIS 30 exit 3 eastbound exit 240A westbound
	Town of Blooming Grove	141.43	227.61	142	US 12 / US 18 – Madison, Cambridge	Signed as exits 142A (west) and 142B (east); US 12 exit 267
	Town of Pleasant Springs	146.80	236.25	147	CTH-N – Stoughton, Cottage Grove
	Town of Christiana	155.90	250.90	156	US 51 north to CTH-A – Stoughton, Deerfield	Western end of US 51 concurrency
	Town of Albion	159.64	256.92	160	US 51 south – Edgerton WIS 73 north to WIS 106 – Deerfield	Eastern end of US 51 concurrency
Rock	Town of Fulton	162.57	261.63	163	WIS 59 – Edgerton, Milton
	Janesville	170.81	274.89	171A	WIS 26 – Milton
		171.52– 171.57	276.03– 276.12	171B	Alt. I-39 south / US 14 – Janesville	Formerly split into exits 171B (west) and 171C (east)
		174.71	281.17	175	Alt. I-39 north / WIS 11 east (Racine Street) – Delavan	Western end of WIS 11 concurrency; former Bus. US 14
	Town of La Prairie	177.22	285.21	177	WIS 11 west – Janesville, Avalon	Eastern end of WIS 11 concurrency
	Town of Turtle	182.41	293.56	183	CTH-S (Shopiere Road)
	Beloit	184.70	297.25	185A	WIS 81 – Beloit
		184.68	297.21	185B	I-43 north – Milwaukee	I-43 exit 0
		187.13	301.16		I-39 south / I-90 east – Rockford, Chicago	Continuation into Illinois
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access