The Northern Lakes Corridor (I-94) Road Conditions & Traffic

01 Route overview

Interstate 94 runs 1,585 miles from Billings, Montana to Port Huron, Michigan, where it ends at the Blue Water Bridge into Sarnia, Ontario. It is the northernmost coast-bound east-west interstate, paralleling I-90 across Montana, North Dakota, and the upper Midwest before taking its own path across Wisconsin, Illinois, Indiana, and Michigan.

For freight, I-94 is the principal Detroit-to-Northwest corridor, the main route for Bakken oil-patch traffic in North Dakota, and the main Twin Cities-to-Chicago intermodal route. The Detroit and Chicago metro segments rank among the worst truck bottlenecks in the country on ATRI's 2024 Top 100 list, including the Chicago I-90/I-94 interchanges (where I-94 is concurrent with I-90) and the Detroit I-94/I-75 interchange.

Geographically I-94 is mostly flat, with the only significant climbs through the Badlands of western North Dakota and the rolling country of southern Wisconsin. Weather hazards are dominated by ground blizzards across the northern Plains, lake-effect snow on the Indiana-Michigan border, and occasional severe weather across Wisconsin and Minnesota.

Northernmost coast-bound east-west interstate
Crosses seven states: MT, ND, MN, WI, IL, IN, MI
Main Bakken oil-patch freight corridor across North Dakota
Concurrent with I-90 across the Dan Ryan in Chicago
Ends at the Blue Water Bridge in Port Huron, one of the top US-Canada truck crossings (BTS)
Crosses the Mississippi River at the Twin Cities
Detroit segment includes the I-94/I-75 stack, among the busiest in the Midwest

02 Key cities & junctions

State	Mile	City / Junction
MT	MM 0	Billings (I-90 jct)
MT	MM 75	Hardin
MT	MM 213	Miles City
MT	MM 295	Glendive
ND	MM 7	Beach
ND	MM 38	Medora / Theodore Roosevelt NP
ND	MM 64	Dickinson
ND	MM 152	Bismarck (US-83 jct)
ND	MM 258	Jamestown
ND	MM 351	Fargo (I-29 jct)
MN	MM 12	Moorhead
MN	MM 168	St. Cloud
MN	MM 240	Minneapolis (I-35W jct)
MN	MM 250	St. Paul (I-35E jct)
WI	MM 21	Hudson
WI	MM 56	Eau Claire
WI	MM 143	Tomah (I-90 jct)
WI	MM 240	Madison (I-39/I-90 jct)
WI	MM 300	Milwaukee
WI	MM 348	Kenosha
IL	MM 1	Zion
IL	MM 35	Chicago Edens / Dan Ryan
IN	MM 0	Hammond
IN	MM 21	Gary (I-65/I-80/I-90 jct)
MI	MM 1	Michigan City line
MI	MM 35	Benton Harbor
MI	MM 110	Battle Creek
MI	MM 184	Ann Arbor
MI	MM 215	Detroit (I-75/I-96 jct)
MI	MM 274	Port Huron / Blue Water Bridge

04 Notable hazards & trouble spots

Hazard

Whiteouts and multi-day closures

Northern Plains ground blizzards (MM 0 MT - 351 ND)

The 650-mile stretch across Montana and North Dakota is heavily exposed to winter weather. Ground blizzards drop visibility to zero in minutes, and a single 2022 storm closed nearly 500 miles of I-94 from Billings to Jamestown (FreightWaves). MDT and NDDOT regularly close the road for 24 to 72 hours during major events. Plan winter long-hauls with multiple shutdown options.

Hazard

Heavy oversize / overweight truck volume

Bakken oil traffic, ND (MM 38-152)

I-94 across western North Dakota carries enormous volumes of oilfield equipment, frac sand, and tanker traffic. Construction zones are continuous, and rural exits often have inadequate parking. Use the dedicated truck stops at Belfield, Dickinson, and Bismarck.

Hazard

Chronic urban congestion with HAZMAT restrictions

Chicago Dan Ryan / Edens (MM 35 IL - 0 IN)

I-94 through Chicago is one of the busiest urban interstates in the country. The Dan Ryan and Kennedy reversible express lanes are off-limits to commercial vehicles. HAZMAT routing requires specific bypass routes. Check Illinois Tollway and IDOT bulletins.

Hazard

Sudden squalls off Lake Michigan

Lake-effect snow, IN/MI (MM 0 IN - 35 MI)

I-94 along the southeastern shore of Lake Michigan is exposed to severe lake-effect snow squalls that can drop visibility to zero in minutes. Multi-vehicle pile-ups are routine in winter. INDOT and MDOT publish real-time alerts.

Hazard

Heavy urban congestion with ongoing reconstruction

Detroit I-94 / I-75 stack (MM 215)

The I-94/I-75 stack in central Detroit is one of the busiest truck interchanges in the Midwest. Major reconstruction continues. MDOT publishes real-time alerts; plan deliveries outside 6-9 AM and 3-7 PM peaks.

4a National parks along this route

IN National Park

Indiana Dunes National Park

Exit 26B (IN-49 N / Chesterton)

3 mi north on IN-49 to the Indiana Dunes Visitor Center

Plan a stop →

ND National Park

Theodore Roosevelt National Park

Exit 27 (Medora, ND)

1 mi to the South Unit Visitor Center; Exit 24 (Painted Canyon) is direct off the interstate

Plan a stop →

05 Active incidents (100)

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EB I-94/Niles Ramp: Total Closure

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EB I-94/Napier Ramp: Total Closure

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NB Pipestone/EB I-94 Ramp: Total Closure

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Showing 18 of 100. View all on map →

06 Active weather alerts

No active NWS weather alerts intersecting Interstate 94.

07 FAQ

How long does it take to drive I-94 end to end?

A passenger car can cover the 1,585 miles in 23-26 hours of driving time. Commercial drivers respecting hours-of-service rules typically need 3 to 4 days, with weather-related delays common across the Plains in winter and chronic congestion through the Twin Cities, Chicago, and Detroit metros.

Is I-94 a toll road?

No. I-94 is toll-free for its entire 1,585-mile length. Adjacent toll roads exist (the Indiana Toll Road carries I-90 around Chicago, the Illinois Tollway operates several other corridors), but I-94 itself charges no tolls.

Does I-94 close in winter?

Frequently across the Plains. The Montana and North Dakota segments see multi-day closures every winter for ground blizzards and severe windchill. Lake-effect snow events on the Indiana-Michigan border can shut down lanes for hours. Check MDT, NDDOT, INDOT, and MDOT before committing.

Where does I-94 begin and end?

I-94 begins at I-90 in Billings, Montana and ends at the Blue Water Bridge in Port Huron, Michigan, which crosses into Sarnia, Ontario. The Blue Water Bridge is one of the top US-Canada truck crossings. Bureau of Transportation Statistics counts put Port Huron among the top three northern-border truck ports, behind Detroit and around Buffalo, and its truck volume has been climbing.

What major cities does I-94 connect?

I-94 directly serves Billings, Bismarck, Fargo, Minneapolis, St. Paul, Eau Claire, Madison, Milwaukee, Chicago, Gary, Kalamazoo, Ann Arbor, Detroit, and Port Huron.

I-94: The Northern Lakes Corridor

Whiteouts and multi-day closures

Heavy oversize / overweight truck volume

Chronic urban congestion with HAZMAT restrictions

Sudden squalls off Lake Michigan

Heavy urban congestion with ongoing reconstruction

Indiana Dunes National Park

Theodore Roosevelt National Park

Interstate 94 Live Map