Interstate 75 in Michigan

Interstate 75 in Michigan

Interstate 75 marker

Interstate 75

I-75 highlighted in red
Route information
Maintained by MDOT
Length: 395.54 mi[1] (636.56 km)
Existed: 1958 – present
Lake Erie Circle Tour, Lake Huron Circle Tour, Lake Michigan Circle Tour, Lake Superior Circle Tour
Major junctions
South end: I-75 near Erie

I-96 in Detroit
I-94 in Detroit
US 23 in Flint
I-69 in Flint
US 10 in Bay City

US 127 near Grayling
North end: Canadian border on Int'l Bridge in Sault Ste. Marie
Counties: Monroe, Wayne, Oakland, Genesee, Saginaw, Bay, Arenac, Ogemaw, Roscommon, Crawford, Otsego, Cheboygan, Emmet, Mackinac, Chippewa
Highway system

Main route of the Interstate Highway System
Main • Auxiliary • Business

Michigan State Trunkline Highway System
Interstate • US • State

M-74 M-75

Interstate 75 (I-75) is a part of the Interstate Highway System and runs from Miami, Florida to Sault Ste. Marie in the Upper Peninsula of Michigan. I-75 enters the state from Ohio in the south, just to the north of Toledo. It runs generally north through Detroit, Pontiac and Bay City, crossing the Mackinac Bridge and ending at the Canadian border in Sault Ste. Marie. On the Canadian side, drivers must use a series of city streets in Sault Ste. Marie, Ontario to reach Highway 17, the local route of the Trans-Canada Highway. The total length in Michigan is 395 miles (636 km).


Route description

Mackinac Bridge

I-75 connects Michigan's Upper and Lower Peninsulas via the 5-mile (8.0 km) long suspension Mackinac Bridge.

At the northern end of I-75, at Sault Ste. Marie, Michigan, the Sault Ste. Marie International Bridge leads into Canada, into Sault Ste. Marie, Ontario. This is the closest connection of any Interstate to the Trans-Canada Highway.

In Detroit, the spur route I-375 is the shortest signed spur of I-75 at 1.06 miles (1.71 km). Interstate 375 is the shortest signed Interstate Highway. In addition, at that same junction, the I-75 curve where it shifts from the Fisher Freeway to the Chrysler Freeway is one of the sharpest on a mainline route in the entire Interstate system, with a 25 mph (40 km/h) advisory speed.


  • The section in Cheboygan County from the southern end of the Mackinac Bridge to the south is known as the G. Mennen Williams Freeway.
  • The section from the northern end of the Mackinac Bridge in Mackinac County proceeding north is known as the Prentiss M. Brown Freeway.
  • The section between downtown Detroit and Pontiac is known as the (Walter P.) Chrysler Freeway. It is one of busiest segments of I-75 and hosts one of the perennially busiest segments of freeways in Michigan. The Chrysler Freeway continues south as I-375.
  • The section through Southern and central Detroit to the Chrysler Freeway is known as the Fisher Freeway
  • The section south of the Fisher Freeway is called the Detroit–Toledo Freeway south to the Ohio state line.


Pre designation

Prior to any segment of freeway in Michigan being designated as part of Interstate 75 various sections of it had been constructed.

Between the mid and late 1950s the following sections were constructed:

  • US 2 between what is now known as BL I-75 in St. Ignace and M-123 was the Upper Peninsula's first segment.
  • Alt US 24 between Ohio border and US 25 (now M-125) was the first segment of Michigan's I-75 to cross the state border; and the only freeway to cross the border until the early 1960s.
  • Mackinac Bridge (on what was then US 27) was completed in 1957.
  • M-20 (now part of US 10) - when this segment became US 10; it carried the temporary Interstate 75 designation.

Post designation

In 1960 the Zilwaukee Bridge, a Bascule bridge across the Saginaw River was constructed.[2]

In the 1960s, I-75 had several discontiguous segments connected with roads with "TO I-75" signs in addition to US 10 doubling as "TEMP I-75".

The section between Grayling, Michigan and M-32 was built in 1961. Between Higgins Lake and Grayling, it was built by converting the northbound lanes of U.S. Route 27 to southbound lanes and building a new set of northbound lanes leaving the former southbound lanes as a strip of grass. The terminus of the freeway near downtown Grayling was converted to a partial interchange for what would become BL I-75. Alongside that, the former segment of US 27 between Grayling and Gaylord, Michigan was turned back to local control. After this individual segment of freeway was completed, it left a gap between Gaylord and Indian River which was filled in a year later. While the gap was being filled in, a special "TO I-75" designation was applied to the former segment of US 27. Around that time, US 27's northern terminus was scaled back to 5 miles (8.0 km) south of Grayling until it was redesignated as an extension of US 127 in 2001.

A 12-mile (19 km) section of I-75 was opened between Gaylord and Waters in July 1962.[3]

In Detroit the Fisher Freeway was built in 'the early 1960s'[4] and then the Chrysler Freeway in 1967.[5]

Until the early 1970s, I-75 between Bay City and Grayling was routed west to Clare (along US-10 then north along then-US-27, and was signed as "TEMP I-75". This freeway segment had some at-grade intersections at the time. In 2002 the portion between Clare and Grayling was redesignated as an extension of US 127, although it was posted as US 127 on a National Geographic road atlas in the year 2000.

The section between Alger and Roscommon was completed in 1973, and the temporary section reverted to U.S. routes, although of freeway quality.

Until the completion of I-75 in 1973, the stretch of freeway between Standish and West Branch had the designation of M-76. When the I-75 signs were erected along the freeway, M-76 vanished from the state road map after 53 years of existence.

In the 1988 the original bascule Zilwaukee Bridge across the Saginaw River was replaced by a much higher structure slightly north of the former bridge.[2]

Until 1987, US 10 and I-75 were the same road between Bay City and Clarkston. Both also overlapped US 23 between Bay City and Flint. Now, Bay City serves as the eastern terminus of US 10.

As late as 1990, US 31 and US 23 both had their northern termini on I-75's southern approach to the Mackinac Bridge. Even though US 27 was scaled back 94 miles (from Mackinaw City to south of Grayling) in 1961, a lone sign assembly showed all three US highways ending at the same place as late as 1971.

Late 2000s

Beginning on February 25, 2008, the Interstate closed completely to traffic in both directions from Rosa Parks Boulevard (Exit 49) to Clark Street (Exit 47) in Detroit.[6] This facilitated the complete rebuilding of the road as part of the Gateway Project to better connect Interstates 75 and 96 to the Ambassador Bridge. Through traffic on 75 was instructed to take I-94 to I-275 and local detours were posted. The freeway re-opened to through traffic in July 2009, hence about all of the signs on I-75 within Detroit's city limits are in the Clearview typeface.

Spur routes

  • I-275 - Begins as a loop from Northern Monroe County and continues to connect up with Interstate 696. Was going to connect back up with I-75 north of Pontiac. Serves the Western population of Wayne County and Detroit Metro Airport.
  • I-375 - Is the shortest signed Interstate in the nation. It serves the immediate downtown Detroit area.
  • I-475 - Known as the U.A.W. Freeway. Serves Flint's downtown areas as I-75 goes to the west side of the city.
  • I-675 - A loop into the city of Saginaw and back out north of the city. Served as an alternate to I-75 when the drawbridge over the Saginaw River was still operating.

Exit list

County Location Mile Exit Destinations Notes
Erie Township 0.00 I-75 – Toledo Ohio state line
1.66 2 Summit Street Southbound exit and northbound entrance
2.49 2
CONN M-125 – Erie
Northbound exit and southbound entrance
4.60 5 Erie Road – Erie, Temperance Diamond interchange
Luna Pier 5.78 6 Luna Pier Diamond interchange
La Salle Township 8.62 9 South Otter Creek Road – La Salle Folded diamond interchange
Monroe Charter Township 11.36 11 La Plaisance Road – Downtown Monroe Diamond interchange
Monroe 13.45 13 Front Street – Monroe Folded diamond interchange
13.57 14 Elm Avenue Folded diamond interchange
Frenchtown Charter Township 15.21 15 Dixie Highway – Downtown Monroe Former M-50; diamond interchange
18.03 18 Nadeau Road Diamond interchange
20.26 20 I-275 north – Flint To Detroit Metro Airport
Berlin Charter Township 21.45 21 Swan Creek Road – Newport To Newport Road; folded diamond interchange
South Rockwood 26.32 26 South Huron River Drive – South Rockwood
Rockwood 26.93 27 North Huron River Drive – Rockwood Folded diamond interchange
Brownstown Charter Township 27.96 28 M-85 north (Fort Street) / LECT Northbound exit and southbound entrance; southern terminus of M-85 and northern end of LECT concurrency; half trumpet interchange
Flat Rock 28.80 29 Gibraltar, Flat Rock Signed as exits 29A (Gibraltar) and 29B (Flat Rock) southbound. Six-ramp parclo AB4 interchange
Woodhaven 31.79 32 West Road Signed as exits 32A (east) and 32B (west); six-ramp parclo B4 interchange
Brownstown Charter Township 33.67 34A To US 24 (Telegraph Road) Southbound exit and northbound entrance; partial diamond interchange
34.00 34B Sibley Road, Dix Highway Signed as exit 34 northbound; diamond interchange
Taylor 35.06 35 US 24 (Telegraph Road) Northbound exit and southbound entrance; partial Y interchange.
35.92 36 Eureka Road Four-ramp parclo A3 interchange
37.06 37 Allen Road, Northline Road Diamond interchange
Lincoln Park 39.84 40 Dix Highway Two-level turbine interchange
40.67 41 M-39 (Southfield Road) Six-ramp parclo A4 interchange
Melvindale 41.81 42 Outer Drive Diamond interchange
Detroit 43.13 43 M-85 (Fort Street) / LECT / Schaefer Highway Signed as exits 43A (south) and 43B (north) southbound; former northern terminus of M-85; Southern end of LECT concurrency; six-ramp parclo AB4 interchange
44.83 44 Dearborn Street Northbound exit and southbound entrance; partial diamond interchange
45.57 45 M-85 (Fort Street) / Springwells Street Diamond interchange
46.46 46 Livernois Avenue Diamond interchange
47.42 47A Clark Street Former M-3, Signed as exit 47 northbound; diamond interchange
48.02 47B Ambassador Bridge to Canada
To Highway 3; southbound exit and northbound entrance; northern end of LECT concurrency
48.27 47C Vernor Highway Southbound exit and northbound entrance
48.85 48 I-96 west (Jeffries Freeway) – Lansing Eastern terminus of I-96
49.87 49 M-10 (Lodge Freeway) / Rosa Parks Boulevard – Civic Center Signed as exits 49A (Rosa Parks Boulevard) and 49B (M-10) southbound; three-level turbine interchange
50.16 50 Grand River Avenue Access to Comerica Park
50.82 51B M-3 (Gratiot Avenue via Fisher Freeway) to M-53 Signed as exit 51 northbound
50.97 51C I-375 south (Chrysler Freeway) – Downtown Detroit Sharp turn 25 miles per hour (40 km/h); three-level turbine interchange
51.76 52 Mack Avenue Diamond interchange
52.50 53A Warren Avenue Diamond interchange
53.06 53B I-94 (Ford Freeway) – Port Huron, Chicago Three-level cloverstack interchange
53.48 54 East Grand Boulevard, Clay Avenue Diamond interchange
Hamtramck 55.14 55 Holbrook Avenue, Caniff Avenue Diamond interchange
Detroit 56.17 56 M-8 (Davison Freeway) Signed as exits 56A (east) and 56B (west); three-level turbine interchange
56.95 57 McNichols Road Diamond interchange
58.02 58 7 Mile Road Diamond interchange
Hazel Park
59.01 59 M-102 (8 Mile Road) Three-level diamond interchange
Hazel Park 60.11 60 John R. Street, 9 Mile Road Diamond interchange
Hazel Park
Madison Heights
Royal Oak
61.40 61 I-696 (Reuther Freeway) – Port Huron, Lansing Four-level stack interchange
Royal Oak
Madison Heights
62.38 62 11 Mile Road, 10 Mile Road west Diamond interchange
Madison Heights 63.38 63 12 Mile Road Six-ramp parclo A4 interchange
Madison Heights
65.41 65 14 Mile Road Signed as exits 65A (east) and 65B (west). Six-ramp parclo B4 interchange
Troy 67.62 67 Rochester Road Four-ramp parclo A2 interchange
69.17 69 Big Beaver Road Signed as exits 69A (east) and 69B (west); cloverleaf interchange with collector-distributor lanes
72.28 72 Crooks Road Indirect accsess to Crooks Road, requires exiting onto a trumpet interchange with Corporate Drive to reach Crooks Road
Bloomfield Township 74.31 74 Adams Road Folded diamond interchange
75.64 75 BL I-75 north (Square Lake Road) – Pontiac Signed as Square Lake Road southbound; full Y interchange
Auburn Hills 77.58 77 M-59 – Utica, Pontiac Signed as exits 77A (east) and 77B (west). Cloverleaf interchange
78.59 78 Chrysler Drive
79.25 79 University Drive – Rochester Six-ramp parclo A4 interchange
81.22 81 M-24 / BL I-75 south – Lapeer, Oxford Access to The Palace of Auburn Hills; double trumpet interchange
83.11 83 Joslyn Road Signed as exits 83A (north) and 83B (south) southbound; east entrance to Great Lakes Crossing; six-ramp parclo AB4 interchange
84.34 84 Baldwin Road Signed as exits 84A (north) and 84B (south) northbound; west entrance to Great Lakes Crossing; six-ramp parclo AB4 interchange
Independence Township 88.75 89 Sashabaw Road
90.99 91 M-15 – Clarkston, Davison Six-ramp parclo A4 interchange
Springfield Township 92.79 93 US 24 (Dixie Highway) – Waterford Northern terminus of US 24
98.21 98 East Holly Road Folded diamond interchange
Groveland Township 101.19 101 Grange Hall Road – Fenton, Ortonville Four-ramp parclo A2 interchange
Holly Township 106.33 106 Dixie Highway Southbound exit and northbound entrance
106.63 106 Saginaw Road – Grand Blanc Northbound exit and southbound entrance
Grand Blanc 108.86 108 Holly Road – Grand Blanc Diamond interchange
110.08 109 M-54 (Dort Highway) – Burton Southern terminus of M-54; combination of a trumpet and cloverleaf interchange
111.88 111 I-475 north – Downtown Flint Northbound exit and southbound entrance; partial Y interchange
Mundy Township 115.12 115 US 23 south – Ann Arbor Southern end of US 23 concurrency; southbound exit and northbound entrance; partial Y interchange
Flint 116.49 116 Airport Sign.svg Bristol Road – Bishop International Airport Signed as exits 116A (east) and 116B (west) southbound; former M-121; seven-ramp parclo AB4 interchange
Flint Township 117.38 117 I-69 / Miller Road – Port Huron, Lansing Signed as exits 117A (I-69) and 117B (Miller Road); I-69 interchange is a three-level cloverstack, Miller Road interchange is a four-ramp parclo A3 interchange
118.91 118 M-21 (Corunna Road) – Owosso Folded diamond interchange
Mount Morris Township 122.11 122 Pierson Road – Flushing Six-ramp parclo A4 interchange
125.59 125 I-475 south – Downtown Flint Semi-directional T interchange
126.13 126 Mt. Morris Diamond interchange
Vienna Township 131.21 131 M-57 – Clio, Montrose
Birch Run 136.29 136 M-54 / M-83 – Birch Run, Frankenmuth Northern terminus of M-54; southern terminus of M-83
Bridgeport Township 144.69 144 Frankenmuth, Bridgeport Signed as exits 144A (Frankenmuth) and 144B (Bridgeport) northbound
Buena Vista Township 149.40 149 M-46 (Holland Avenue) – Sandusky Signed as exits 149A (east) and 149B (west)
149.72 150 I-675 north – Downtown Saginaw
151.88 151 M-81 – Caro, Reese
153.08 153 M-13 (East Bay City Road) – Saginaw
Saginaw River Zilwaukee Bridge
Zilwaukee 154.02 154 Zilwaukee
Zilwaukee Township 155.96 155 I-675 south – Downtown Saginaw
Frankenlust Township 160.30 160 M-84 (Saginaw Road)
Monitor Township 162.81 162 US 10 west / M-25 east / BL I-75 east – Downtown Bay City, Clare Eastern terminus of US 10; western terminus of M-25 and BL I-75; signed as 162A (east) and 162B (west)
164.31 164
CONN M-13 – Kawkawlin
Kawkawlin Township 168.05 168 Beaver Road
Fraser Township 173.01 173 Linwood Road – Linwood
Pinconning Township 181.02 181 Pinconning Road – Pinconning
Lincoln Township 188.65 188 US 23 north – Alpena, Standish Northern end of US 23 concurrency: Southbound exit and northbound entrance
190.97 190 M-61 – Gladwin, Standish
Adams Township 195.08 195 Sterling Road – Sterling
Moffatt Township 202.87 202 M-33 north – Mio, Cheboygan
Horton Township 212.13 212 BL I-75 north (Cook Road) – West Branch
Ogemaw Township 215.73 215 M-55 east / BL I-75 south to M-30 – Tawas City, West Branch Western end of M-55 concurrency
Richfield Township 222.83 222 Old 76 – St. Helen Former M-76
Backus Township 227.60 227 M-55 west – Cadillac, Houghton Lake Eastern end of M-55 concurrency
Higgins Township 239.61 239 M-18 / BL I-75 north – Roscommon, Houghton Lake
Gerrish Township 244.26 244 BL I-75 south – Roscommon, North Higgins Lake State Park
Beaver Creek Township 250.02 249 US 127 – Lansing, Clare Southbound exit and northbound entrance; northern terminus of US 127
Grayling Township 251.03 251 4 Mile Road
Grayling 254.11 254 BL I-75 north to M-72 – Downtown Grayling, Traverse City Northbound exit and southbound entrance
256.14 256 North Down River Road Southbound exit and northbound entrance
Grayling Township 259.19 259 M-93 (Hartwick Pines Road) / BL I-75 south to M-72 – Downtown Grayling, Traverse City Signed as M-93 only (northbound)
Maple Forest Township 264.23 264 Frederic, Lewiston
Otsego Lake Township 270.83 270 Waters
Bagley Township 279.05 279 BL I-75 north (Old 27) – Downtown Gaylord Former US 27; signed as Old 27 only (southbound)
Gaylord 281.95 282 M-32 / BL I-75 south – Downtown Gaylord, Alpena Signed as M-32 only (northbound)
Vanderbilt 290.70 290 Old 27 – Vanderbilt
Nunda Township 300.97 301 C-58 – Wolverine
Indian River 310.16 310 M-68 – Indian River, Rogers City
313.49 313 M-27 north – Cheboygan, Indian River Southern terminus of M-27
Munro Township 322.51 322 C-64 – Cheboygan, Pellston
Hebron Township 326.71 326 C-66 – Cheboygan, Cross Village
Mackinaw Township 335.69 336 US 31 south / LMCT south – Petoskey, Charlevoix Southbound exit and northbound entrance; northern terminus of US 31 and southern end of LMCT concurrency
Mackinaw Township
Wawatam Township
337.72 337 Nicolet Street north – Mackinaw City Northbound exit and southbound entrance; southern terminus of the former M-108
Mackinaw City 338.47 338 US 23 south / LHCT south – Cheboygan, Rogers City, Alpena Southbound exit and northbound entrance; northern terminus of US 23; southern end of LHCT, signed as the GLCT from here north
338 Michigan Welcome Center Northbound exit only
339.22 339 Jamet Street
Straits of Mackinac
Mackinac Bridge
St. Ignace 343.80 343 Bridge View Park Southbound exit only
344.38 344 US 2 west / BL I-75 north / GLCT – St. Ignace, Escanaba, Manistique Signed as exits 344A (north) and 344B (west) northbound, BL I-75 not signed southbound
Eastern terminus of the western US segment of US 2; southern terminus of BL I-75
LMCT follows exit 344A to US 2 and LHCT follows exit 344B to BL I-75
345.08 345 Portage Street – St. Ignace Southbound exit and northbound entrance
St. Ignace Township 348.10 348 BL I-75 south / LMCT – St. Ignace
H-63 north / Mackinac Trail
Signed as BL I-75 southbound and H-63 northbound; southern end of LMCT concurrency
352.15 352 M-123 north – Newberry Southern terminus of M-123
359.37 359 M-134 east / LMCT – Drummond Island, De Tour Village Western terminus of M-134; northern end of LMCT concurrency
Rudyard Township 373.71 373 M-48 east (H-40) – Pickford, Rudyard Western terminus of M-48
Kinross Township 377.88 378 M-80 east – Kinross Western terminus of M-80
379.64 379 Gaines Highway – Barbeau Area
Dafter Township 386.27 386 M-28 / LSCT west – Munising, Newberry Southern end of LSCT concurrency
Sault Ste. Marie 392.57 392 BS I-75 north (3 Mile Road) / LMCT – Sault Ste. Marie Southern end of LMCT concurrency signed as GLCT concurrency
394.74 394 Easterday Avenue – Sault Ste. Marie, Soo Locks
St. Marys River
  International Bridge to Canada
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
     Concurrency terminus     Closed/Former     Incomplete access     Unopened


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