State profile · Above median Poor share

Michigan bridge safety

According to the Federal Highway Administration's 2024 National Bridge Inventory, condition ratings, load ratings, and Poor-condition shares for every public highway bridge in Michigan.

11,371
Public bridges
33.7%
Good condition
11.3%
Poor condition

Michigan holds 11,371 public highway bridges (#25 of 52 by inventory) with a 11.27% Poor share (#9 of 52 by Poor share).

That is 11.3% of the state's inventory, against an average of 7.5% across the 54 states and territories with Poor-rated bridges on file, which places it 44 of 54 ordered from the lowest Poor share upward. A bridge is rated Poor when its weakest applicable component scores 4 or below on the inspecting agency's 0-9 scale, so the category is a maintenance and funding signal rather than a closure order or a live crossing-safety verdict.

Inventory: FHWA NBI 2024 · last ETL August 2026

Total Bridges

11,371

Public highway bridges in Michigan

Good Condition

33.7%

3,836 bridges rated 7-9

-16.3pp vs 50% benchmark

Poor Condition

11.3%

1,281 bridges whose lowest applicable component is rated 0-4

3.8pp vs national avg 7.5%

Michigan vs national bridge condition

Michigan - Good condition share 33.7%
National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

Michigan - Poor-condition share 37.6%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.5%.

Michigan in the national condition pattern

Each point is a state or territory in the FHWA NBI; the highlighted point is this profile.

Inventory size and Poor-condition share are different measures: Michigan has 11,371 bridges and a 11.3% Poor-condition share in the 2024 NBI, rank #44 of 54 jurisdictions ordered from the lowest share upward. The dashed comparisons mark the national average state rate and the midpoint of the plotted inventory range; neither is a live safety or closure threshold. Scatter plot of 54 data points. 0%10%20%30%40% 0k20k40k60k Public bridges in inventory (thousands) Poor-condition share (%) MI, Public bridges in inventory (thousands): 11.4k · Poor-condition share (%): 11.27%AL, Public bridges in inventory (thousands): 16.2k · Poor-condition share (%): 3.35%AK, Public bridges in inventory (thousands): 1.7k · Poor-condition share (%): 7.89%AZ, Public bridges in inventory (thousands): 8.6k · Poor-condition share (%): 1.15%AR, Public bridges in inventory (thousands): 13k · Poor-condition share (%): 5.43%CA, Public bridges in inventory (thousands): 25.8k · Poor-condition share (%): 5.91%CO, Public bridges in inventory (thousands): 9k · Poor-condition share (%): 4.82%CT, Public bridges in inventory (thousands): 4.4k · Poor-condition share (%): 4.72%DE, Public bridges in inventory (thousands): 0.9k · Poor-condition share (%): 1.26%DC, Public bridges in inventory (thousands): 0.3k · Poor-condition share (%): 1.95%FL, Public bridges in inventory (thousands): 13k · Poor-condition share (%): 2.79%GA, Public bridges in inventory (thousands): 15.1k · Poor-condition share (%): 1.59%GU, Public bridges in inventory (thousands): 0k · Poor-condition share (%): 12.77%HI, Public bridges in inventory (thousands): 1.2k · Poor-condition share (%): 6.53%ID, Public bridges in inventory (thousands): 4.6k · Poor-condition share (%): 4.9%IL, Public bridges in inventory (thousands): 26.9k · Poor-condition share (%): 9.35%IN, Public bridges in inventory (thousands): 19.5k · Poor-condition share (%): 5.22%IA, Public bridges in inventory (thousands): 23.7k · Poor-condition share (%): 19.16%KS, Public bridges in inventory (thousands): 24.9k · Poor-condition share (%): 5.26%KY, Public bridges in inventory (thousands): 14.5k · Poor-condition share (%): 7.37%LA, Public bridges in inventory (thousands): 12.7k · Poor-condition share (%): 11.48%ME, Public bridges in inventory (thousands): 2.5k · Poor-condition share (%): 15.41%MD, Public bridges in inventory (thousands): 5.5k · Poor-condition share (%): 4.56%MA, Public bridges in inventory (thousands): 5.3k · Poor-condition share (%): 8.88%MN, Public bridges in inventory (thousands): 13.5k · Poor-condition share (%): 4.44%MS, Public bridges in inventory (thousands): 16.7k · Poor-condition share (%): 6.03%MO, Public bridges in inventory (thousands): 24.6k · Poor-condition share (%): 8.95%MT, Public bridges in inventory (thousands): 5.2k · Poor-condition share (%): 6.81%NE, Public bridges in inventory (thousands): 15.4k · Poor-condition share (%): 7.9%NV, Public bridges in inventory (thousands): 2.1k · Poor-condition share (%): 1.14%NH, Public bridges in inventory (thousands): 2.5k · Poor-condition share (%): 7.51%NJ, Public bridges in inventory (thousands): 6.8k · Poor-condition share (%): 6.01%NM, Public bridges in inventory (thousands): 4k · Poor-condition share (%): 4.51%NY, Public bridges in inventory (thousands): 17.6k · Poor-condition share (%): 9.43%NC, Public bridges in inventory (thousands): 19.2k · Poor-condition share (%): 6.76%ND, Public bridges in inventory (thousands): 4.3k · Poor-condition share (%): 10.98%OH, Public bridges in inventory (thousands): 26.7k · Poor-condition share (%): 4.74%OK, Public bridges in inventory (thousands): 22.9k · Poor-condition share (%): 7.7%OR, Public bridges in inventory (thousands): 8.3k · Poor-condition share (%): 4.61%PA, Public bridges in inventory (thousands): 23.3k · Poor-condition share (%): 12.58%PR, Public bridges in inventory (thousands): 2.4k · Poor-condition share (%): 13.92%RI, Public bridges in inventory (thousands): 0.8k · Poor-condition share (%): 15.2%SC, Public bridges in inventory (thousands): 9.5k · Poor-condition share (%): 6.17%SD, Public bridges in inventory (thousands): 5.9k · Poor-condition share (%): 16.36%TN, Public bridges in inventory (thousands): 20.4k · Poor-condition share (%): 4.41%TX, Public bridges in inventory (thousands): 56.7k · Poor-condition share (%): 1.23%UT, Public bridges in inventory (thousands): 3.1k · Poor-condition share (%): 2.91%VT, Public bridges in inventory (thousands): 2.9k · Poor-condition share (%): 2.9%VI, Public bridges in inventory (thousands): 0k · Poor-condition share (%): 29.17%VA, Public bridges in inventory (thousands): 14.1k · Poor-condition share (%): 3.39%WA, Public bridges in inventory (thousands): 8.5k · Poor-condition share (%): 5.45%WV, Public bridges in inventory (thousands): 7.3k · Poor-condition share (%): 18.64%WI, Public bridges in inventory (thousands): 14.4k · Poor-condition share (%): 6.52%WY, Public bridges in inventory (thousands): 3.1k · Poor-condition share (%): 6.51%
Inventory size and Poor-condition share are different measures: Michigan has 11,371 bridges and a 11.3% Poor-condition share in the 2024 NBI, rank #44 of 54 jurisdictions ordered from the lowest share upward. The dashed comparisons mark the national average state rate and the midpoint of the plotted inventory range; neither is a live safety or closure threshold.

Michigan vs all states by public bridge inventory

Where this state's FHWA NBI public-highway bridge count sits among every state and territory on PlainBridges

11,371 25th of 54 higher than 29 of 54 states

States and territories, banded by public bridge inventory size

Each bar is a band; taller bars hold more states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source FHWA National Bridge Inventory · 2024

Read the rank neighborhood for Michigan

The highlighted point is Michigan: 11,371 bridges and 11.27% in Poor condition, rank #44 of 54 jurisdictions ordered from the lowest share upward. The five jurisdictions immediately above and below Michigan on that same Poor-share ordering:

  • New York: 17,642 bridges · 9.43% Poor
  • North Dakota: 4,255 bridges · 10.98% Poor
  • Michigan: 11,371 bridges · 11.27% Poor
  • Louisiana: 12,698 bridges · 11.48% Poor
  • Pennsylvania: 23,299 bridges · 12.58% Poor

The full national sortable table lives on the rankings page.

Material families in Michigan

Exclusive FHWA material families across all 11,371 bridges in this state; continuous variants fold into the parent family. Orthogonal to the Poor-share scatter above.

Who maintains Michigan’s inventory

State agency holds 40.0% of the 11,371 public highway bridges filed under Michigan in the 2024 NBI, the agency-of-record split for this state, not a condition verdict.

When Michigan’s bridges were built

Pre-1950 construction accounts for 13.1% of the 11,371 bridges with a recorded original year in Michigan. Era bands are orthogonal to the Poor-share ranking above.

Condition Distribution

Michigan33.7%55%11.3%GoodFairPoor
Bridge inventory deck-condition mix - Michigan (FHWA NBI)

Counties (83)

Alcona 27 Alger 53 Allegan 244 Alpena 32 Antrim 15 Arenac 80 Baraga 68 Barry 69 Bay 166 Benzie 25 Berrien 272 Branch 118 Calhoun 213 Cass 52 Charlevoix 18 Cheboygan 73 Chippewa 112 Clare 96 Clinton 216 Crawford 54 Delta 84 Dickinson 37 Eaton 200 Emmet 37 Genesee 371 Gladwin 63 Gogebic 104 Grand Traverse 33 Gratiot 167 Hillsdale 105 Houghton 58 Huron 192 Ingham 241 Ionia 119 Iosco 47 Iron 54 Isabella 183 Jackson 158 Kalamazoo 151 Kalkaska 15 Kent 523 Keweenaw 12 Lake 30 Lapeer 163 Leelanau 8 Lenawee 225 Livingston 165 Luce 28 Mackinac 63 Macomb 417 Manistee 35 Marquette 147 Mason 66 Mecosta 80 Menominee 96 Midland 139 Missaukee 39 Monroe 297 Montcalm 121 Montmorency 21 Muskegon 144 Newaygo 65 Oakland 508 Oceana 100 Ogemaw 31 Ontonagon 64 Osceola 103 Oscoda 15 Otsego 25 Ottawa 254 Presque Isle 37 Roscommon 43 Saginaw 315 Sanilac 171 Schoolcraft 54 Shiawassee 163 St. Clair 327 St. Joseph 132 Tuscola 242 Van Buren 129 Washtenaw 262 Wayne 1026 Wexford 64

Michigan vs nearby ranks

Adjacent states by Poor-condition share (lower share = better)

States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below Michigan on the same metric.

NY

New York

9.43% top marginal rate
Structure
Progressive
Burden @ $100K
$17,642

ND

North Dakota

10.98% top marginal rate
Structure
Progressive
Burden @ $100K
$4,255
Selected

MI

Michigan

11.27% top marginal rate
Structure
Progressive
Burden @ $100K
$11,371

LA

Louisiana

11.48% top marginal rate
Structure
Progressive
Burden @ $100K
$12,698

PA

Pennsylvania

12.58% top marginal rate
Structure
Progressive
Burden @ $100K
$23,299

Bridges Needing Most Attention in Michigan

Six lowest-condition bridges in Michigan, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.

WOODLAND ROAD

Poor

Over: AU TRAIN RIVER

0.75 MI E OF AU TRAIN, Alger, MI

Built 1910 Load: 0.0 t

HAZE ROAD

Poor

Over: BETSIE RIVER

1 MI W OF THOMPSONVILLE, Benzie, MI

Built 1900 Load: 0.0 t ADT: 32

BRINK ROAD

Poor

Over: HOG CREEK DRAIN #40

BRONSON TWP SEC 28, Branch, MI

Built 1905 Load: 0.0 t ADT: 111

GOWER ROAD

Poor

Over: COLDWATER RIVER

UNION TWP SEC 10-15, Branch, MI

Built 1900 Load: 0.0 t ADT: 111

DEXTER TRAIL

Poor

Over: MUSKRAT CREEK

0.2 MI N OF CENTERLINE RD, Clinton, MI

Built 1980 Load: 0.0 t ADT: 136

COPPS MINE ROAD

Poor

Over: PRESQUE ISLE RIVER

SEC 28 MARENISCO TWP, Gogebic, MI

Built 1906 Load: 0.0 t ADT: 10

All Bridges in Michigan

I-75 S APPR

Good

Over: HURON AVE

IN MACKINAW CITY, Emmet, MI

Built 1957 Load: 25.9 t ADT: 11,076

HOROSCOPE RD P127

Good

Over: N BR OTTER RIVER

2 MI W OF ELO, Houghton, MI

Built 1984 Load: 25.9 t ADT: 60

STEIN ROAD

Good

Over: PINNEBOG RIVER

SEC. 30-31 COLFAX TWP., Huron, MI

Built 1977 Load: 25.9 t ADT: 150

BRADY AVE.

Good

Over: IRON RIVER

0.6 MI NO CO RD 424, Iron, MI

Built 1994 Load: 25.9 t ADT: 375

PACKER DRIVE

Good

Over: ROGUE RIVER

0.70 MI N OF ROGUE RIVER, Kent, MI

Built 1973 Load: 25.9 t ADT: 1,761

ALLAN RD

Good

Over: MISTEGUAY CREEK

1.1 MI SE OF NEW LOTHROP, Shiawassee, MI

Built 1990 Load: 25.9 t ADT: 128

US-24 NB

Good

Over: MIDDLE ROUGE R

IN DEARBORN HTS, Wayne, MI

Built 1959 Load: 25.9 t ADT: 27,634

CLEVELAND RD

Good

Over: BRAYTON CREEK

0.18 MI W OF 200TH AVE, Oceana, MI

Built 2015 Load: 25.9 t ADT: 400

FREEPORT AVE

Good

Over: DUCK CREEK

0.20 MI S OF 100TH ST, Kent, MI

Built 1948 Load: 26.0 t ADT: 1,024

PRESQUE ISLE ROAD

Good

Over: NORTH BR PLANTERS CREEK

SEC 33 WAKEFIELD TWP, Gogebic, MI

Built 1986 Load: 26.2 t ADT: 544

MAPLE STREET

Good

Over: MANISTEE RIVER

IN MANISTEE, Manistee, MI

Built 1964 Load: 26.2 t ADT: 1,466

MONROE ST

Good

Over: MARTIN CREEK

5.0 MI NW OF HESPERIA, Newaygo, MI

Built 1998 Load: 26.2 t ADT: 150

IMLAY CITY ROAD

Good

Over: WHACKENBUSH DRAIN

SEC. 13-24 EMMETT TWP., St. Clair, MI

Built 1994 Load: 26.2 t ADT: 130

PECKINS RD

Good

Over: MILL CREEK

SHARON TWP. SEC. 12, Washtenaw, MI

Built 1972 Load: 26.2 t ADT: 387

M-153

Good

Over: M-39

IN DEARBORN, Wayne, MI

Built 1998 Load: 26.2 t ADT: 65,932

MCCAIN RD

Good

Over: SANDSTONE CREEK

40 FT EAST OF OBRIEN RD, Jackson, MI

Built 2008 Load: 26.2 t ADT: 3,240

112TH AVENUE

Good

Over: SCHNABLE BROOK

0.4 MI W OF 19TH STREET, Allegan, MI

Built 2014 Load: 26.2 t ADT: 50

20TH STREET

Good

Over: SCHNABLE BROOK

0.08 MI S OF 112TH AVENUE, Allegan, MI

Built 2014 Load: 26.2 t ADT: 50

BANDEMER PARK

Good

Over: HURON RIVER

BANDEMER PARK, Washtenaw, MI

Built 1995 Load: 26.2 t

BROOMHEAD ROAD

Good

Over: S BR BOARDMAN RIVER

7 MILES S OF WILLIAMSBURG, Grand Traverse, MI

Built 1954 Load: 26.4 t ADT: 111

MCCLELLAND ROAD

Good

Over: DRAIN # 142 OUTLET

SEC 19-20 ELBA TWP, Gratiot, MI

Built 1985 Load: 26.4 t ADT: 141

CG ROAD

Good

Over: ESCANABA RIVER

3.5 MILES S OF GREENWOOD, Marquette, MI

Built 1943 Load: 26.4 t ADT: 80

M-59

Good

Over: CLINTON RIVER

4.0 MI W OF PONTIAC, Oakland, MI

Built 1965 Load: 26.6 t ADT: 37,281

M-19

Good

Over: BR CASS RIVER

6.7 MI N OF M-46, Sanilac, MI

Built 2007 Load: 26.6 t ADT: 1,718

SHREEVES ROAD

Good

Over: ALLEN EXTN DRAIN

SEC 16 FAIRGROVE TWP, Tuscola, MI

Built 1967 Load: 26.6 t ADT: 220

WELLS ROAD

Good

Over: S. O. DRAIN

SEC 32 WELLS TWP, Tuscola, MI

Built 1986 Load: 26.6 t ADT: 50

BOSSCHEM RD FH5192

Good

Over: PINE CREEK

0.1 MI S OF PINE LAKE RD, Manistee, MI

Built 2011 Load: 26.6 t ADT: 600

FOREST ROAD 6930

Good

Over: SISSON LILLEY CREEK

5.5 MI S OF MATCHWOOD, Gogebic, MI

Built 2003 Load: 26.6 t ADT: 50

GRANGE AVE

Good

Over: ROGUE RIVER

0.25 MI S OF 11 MILE RD, Kent, MI

Built 1993 Load: 26.7 t ADT: 172

PENNSYLVANIA ROAD

Good

Over: FRANK & POET DRAIN

RIVERVIEW/STHGATE E/ALLEN, Wayne, MI

Built 2004 Load: 26.7 t ADT: 16,154

M-28

Good

Over: LAUGHING WHITEFISH RIVER

3.2 MI E OF MARQUETTE COL, Alger, MI

Built 1939 Load: 26.9 t ADT: 3,093

THREE MILE RD

Good

Over: US-10

2.0 MI W OF BAY CITY, Bay, MI

Built 1958 Load: 26.9 t ADT: 4,626

I-94 WB

Good

Over: CSX RR

1.0 MI N OF HARBERT, Berrien, MI

Built 2003 Load: 26.9 t ADT: 18,325

M-37

Good

Over: WHISKEY CK(LT PLSTER CR)

1.0 MI S OF M-11, Kent, MI

Built 1946 Load: 26.9 t ADT: 29,172

CRAWFORD ROAD

Good

Over: SCHRIBER DRAIN

SEC 15-22 COLUMBUS TWP, St. Clair, MI

Built 2010 Load: 26.9 t ADT: 85

I-75

Good

Over: CONRAIL RR

IN DETROIT, Wayne, MI

Built 1969 Load: 26.9 t ADT: 152,325

FIVE MILE ROAD

Good

Over: UPPER ROUGE RIVER

REDFORD E/BEECH-DALY, Wayne, MI

Built 1978 Load: 26.9 t ADT: 19,861

VICKERYVILLE RD

Good

Over: S BRANCH PINE RIVER

CO 575 0.02 MI S OF EDGAR, Montcalm, MI

Built 1934 Load: 27.0 t ADT: 233

ROUTE 537

Good

Over: TEN MILE CREEK

6.5 MI W OF ESCANABA, Delta, MI

Built 1977 Load: 27.2 t ADT: 278

MULLIKEN ROAD

Good

Over: THORNAPPLE RIVER

6.5 MI S OF MULLIKEN, Eaton, MI

Built 1991 Load: 27.2 t ADT: 808

SOULETOWN ROAD

Good

Over: E BR PINNEBOG RIVER

SEC. 24 CHANDLER TWP., Huron, MI

Built 1999 Load: 27.2 t ADT: 110

COHOCTAH ROAD

Good

Over: CRANBERRY CREEK

SEC 4 DEERFIELD TWP, Livingston, MI

Built 1955 Load: 27.2 t ADT: 420

14 MILE ROAD

Good

Over: RED RUN DRAIN

310 FT W OF HOOVER RD, Macomb, MI

Built 2009 Load: 27.2 t ADT: 17,100

26 MILE ROAD

Good

Over: SALT RIVER

0.5MI EAST OF GRATIOT AVE, Macomb, MI

Built 1996 Load: 27.2 t ADT: 8,910

47 MILE ROAD

Good

Over: TEN MILE CREEK

0.5 MI. W OF PERRONVILLE, Menominee, MI

Built 2003 Load: 27.2 t ADT: 50

SWAN CREEK ROAD

Good

Over: LITTLE SWAN CREEK

0.5 MI N OF TOWNSHIP LINE, Monroe, MI

Built 1997 Load: 27.2 t ADT: 260

CROOKS RD

Good

Over: M-59

3.4 MI E OF I-75, Oakland, MI

Built 2011 Load: 27.2 t ADT: 21,645

148 AVENUE

Good

Over: N BRANCH WHITE RIVER

0.2 MI S OF JOHNSON RD, Oceana, MI

Built 2013 Load: 27.2 t ADT: 708

VOLKMER ROAD

Good

Over: NORTHWOOD CREEK

0.2 MI E OF BUECHE ROAD, Saginaw, MI

Built 1993 Load: 27.2 t ADT: 173

GARY ROAD

Good

Over: DEER CREEK

0.7 MI E OF MCKEIGHAN RD, Saginaw, MI

Built 1977 Load: 27.2 t ADT: 753

Showing 6,401-6,450 of 11,371 bridges

Related

All states → | National rankings → | Understanding conditions → | Retired SD term explained →
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges.

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the FHWA National Bridge Inventory (NBI). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.

Understanding Bridge Conditions

How FHWA rates bridge condition on a 0-9 scale.

Check Your Daily Bridges

How to look up bridge condition data for bridges on your route.

Read our methodology — how this data is sourced, computed, and verified.

What to do with this

Use Michigan's inventory picture to drill to a county or a specific span.

  • Browse counties in Michigan and open the highest-Poor shares first. County list
  • See where this state sits among peers on Poor-condition share. State rankings
  • Compare this state with another jurisdiction on the same measures. State compare

NBI condition ratings are inventory snapshots, not live crossing-safety verdicts.

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Michigan Good/Fair/Poor shares and county rollups on this page are computed from the same NBI extract as the national boards; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.