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

HILL RD

Good

Over: ALGER CREEK

0.74 MI W OF MORRISH RD, Genesee, MI

Built 2019 Load: 51.5 t ADT: 2,064

GARDNER RD

Good

Over: S BR FLINT RIVER

0.25 MI N OF E BROCKER RD, Lapeer, MI

Built 2021 Load: 51.5 t ADT: 100

ADELAIDE

Good

Over: DEQUINDRE CUT PATHWAY

BETWN ORLEANS & ST AUBIN, Wayne, MI

Built 2014 Load: 51.6 t ADT: 335

N EATON ST

Good

Over: KALAMAZOO RIVER

2 BLOCKS WEST OF M-99, Calhoun, MI

Built 2007 Load: 51.7 t ADT: 4,145

M-89

Good

Over: KALAMAZOO RIVER OVERFLOW

6.0 MI E OF FENNVILLE, Allegan, MI

Built 1952 Load: 51.8 t ADT: 4,275

51ST STREET

Good

Over: M BR BLACK RIVER

APPROX 3/8MI NE OF BASELI, Allegan, MI

Built 2017 Load: 51.8 t ADT: 100

ELM VALLEY ROAD

Good

Over: GALIEN RIVER

2 MI E OF UNION PIER, Berrien, MI

Built 1982 Load: 51.8 t ADT: 280

ELM VALLEY ROAD

Good

Over: DOWLING CREEK

4 MI NW OF GALIEN, Berrien, MI

Built 2015 Load: 51.8 t ADT: 200

ROUTE 430

Good

Over: SQUAW CREEK

5.0 MI W OF BEAVER, Delta, MI

Built 2006 Load: 51.8 t ADT: 132

GENESEE ROAD

Good

Over: FLINT RIVER

600 FT NORTH OF STANLEY, Genesee, MI

Built 1970 Load: 51.8 t ADT: 6,507

LUMBER JACK ROAD

Good

Over: PINE RIVER

SEC 6 SUMNER TWP, Gratiot, MI

Built 1949 Load: 51.8 t ADT: 915

UNION STREET

Good

Over: NORTH BRANCH CASS RIVER

0.1 MILE EAST OF M-19, Huron, MI

Built 2003 Load: 51.8 t ADT: 345

PROBERT ROAD

Good

Over: GRAND RIVER

SOUTH OF JACKSON CITY LIM, Jackson, MI

Built 2003 Load: 51.8 t ADT: 1,000

I-69 WB

Good

Over: CLARK RD

1.0 MI S OF LAPEER, Lapeer, MI

Built 1983 Load: 51.8 t ADT: 9,991

RUSHTON ROAD

Good

Over: WALKER DRAIN

SEC 26 GREEN OAK TWP, Livingston, MI

Built 1995 Load: 51.8 t ADT: 6,178

24 MILE ROAD

Good

Over: MCBRIDE DRAIN

0.6 MI WEST OF FOSS ROAD, Macomb, MI

Built 2014 Load: 51.8 t ADT: 3,837

28 MILE ROAD

Good

Over: OVERFLOW N B CLINTON

1.5 MI WEST OF NORTH AVE, Macomb, MI

Built 2018 Load: 51.8 t ADT: 210

OLD M-28 BR

Good

Over: CARP RIVER CHANNEL

W LIMITS OF ISHPEMING, Marquette, MI

Built 2010 Load: 51.8 t ADT: 4,187

COUNTY RD 545

Good

Over: E BR CHOCOLAY RIV

2 MILES NO WEST OF CARLS, Marquette, MI

Built 1939 Load: 51.8 t ADT: 177

LB ROAD

Good

Over: TROUT FALLS CREEK

3 MI SW OF REPUBLIC, Marquette, MI

Built 1978 Load: 51.8 t ADT: 98

W ST ANDREWS ROAD

Good

Over: SNAKE CREEK

IN CITY OF MIDLAND, Midland, MI

Built 2016 Load: 51.8 t ADT: 4,000

CUTLER ROAD

Good

Over: US-131 NB & RAMP

4.0 MI NW OF HOWARD CITY, Montcalm, MI

Built 1978 Load: 51.8 t ADT: 330

US-31 NB

Good

Over: BLACK RIVER

0.4 MI N OF M-21, Ottawa, MI

Built 1949 Load: 51.8 t ADT: 23,373

MARION ROAD

Good

Over: CARSON DRAIN

0.4 MI E OF MCKEIGHAN RD, Saginaw, MI

Built 2007 Load: 51.8 t ADT: 331

STATE ROAD

Good

Over: MAPLE RIVER

2 MILES SOUTH OF CORUNNA, Shiawassee, MI

Built 1995 Load: 51.8 t ADT: 4,360

CARDINAL DRIVE

Good

Over: UNNAMED CANAL

SEC 1 CLAY TWP, St. Clair, MI

Built 1990 Load: 51.8 t ADT: 675

CASS CITY ROAD

Good

Over: LATIMER OR ALLEN RELIEF

SEC 20-29 AKRON TWP, Tuscola, MI

Built 2016 Load: 51.8 t ADT: 72

DENNISON ROAD

Good

Over: SALINE RIVER

YORK TWP SEC 28, Washtenaw, MI

Built 1965 Load: 51.8 t ADT: 1,049

EVERGREEN RD SB

Good

Over: M-153

IN DEARBORN, Wayne, MI

Built 1972 Load: 51.8 t ADT: 30,070

LFT TRN W OF LEVAN

Good

Over: I-96

IN LIVONIA, Wayne, MI

Built 1974 Load: 51.8 t ADT: 2,770

I-75 SB

Good

Over: I-96 WB

IN DETROIT, Wayne, MI

Built 1970 Load: 51.8 t ADT: 33,794

WITZ ROAD

Good

Over: TRIB TO LAKE SUPERIOR

0.5 MI NE OF SKANEE, Baraga, MI

Built 2010 Load: 51.8 t ADT: 203

ARVON ROAD

Good

Over: GOMACHE CREEK

5 MI E OF US-41, Baraga, MI

Built 2005 Load: 51.8 t ADT: 95

ARVON ROAD

Good

Over: PAGES CREEK

8.5 MI E US-41, Baraga, MI

Built 2005 Load: 51.8 t ADT: 38

MARTIN PARKWAY

Good

Over: WETLANDS

COMMERCE TWP SEC 24, Oakland, MI

Built 2011 Load: 51.8 t ADT: 30,950

M-231

Good

Over: BEELINE DRAIN

2.5 MI N OF M-45, Ottawa, MI

Built 2015 Load: 51.8 t ADT: 5,750

I-75

Good

Over: LANE DRAIN

I-75, Oakland, MI

Built 2020 Load: 51.8 t ADT: 103,878

ROOSEVELT ROAD

Good

Over: DRAIN #140

SEC 24 ELBA TWP, Gratiot, MI

Built 1991 Load: 51.9 t ADT: 139

ELKTON ROAD

Good

Over: EAST BR. PIGEON RIVER

SEC. 3-4 GRANT TWP., Huron, MI

Built 1920 Load: 52.1 t ADT: 1,750

CAPITAL AVENUE S W

Good

Over: KALAMAZOO RIVER

N OF DICKMAN (I-94BL), Calhoun, MI

Built 1958 Load: 52.2 t ADT: 16,300

HATHAWAY ROAD

Good

Over: INDIAN CREEK DRAIN

SEC. 17-18 BURLINGTON TWP, Lapeer, MI

Built 2017 Load: 52.2 t ADT: 42

PEAVY ROAD

Good

Over: MARION-GENOA DRAIN

SEC 2 MARION TWP, Livingston, MI

Built 2023 Load: 52.2 t ADT: 1,595

GATES ROAD

Good

Over: EAST MILL LAKE OUTLET

1.1 MI WEST OF VAN DYKE, Macomb, MI

Built 2003 Load: 52.2 t ADT: 398

COLEMAN ROAD

Good

Over: CHIPPEWA RIVER

0.1 MI S OF SCHOOL RD (E), Midland, MI

Built 2021 Load: 52.2 t ADT: 2,114

MONROE RD

Good

Over: BASS LAKE CREEK

0.6 MI S OF MASON COL, Oceana, MI

Built 2000 Load: 52.2 t ADT: 3,700

SALINE-MILAN ROAD

Good

Over: KOCH DRAIN

YORK TWP SEC 6, Washtenaw, MI

Built 2019 Load: 52.2 t ADT: 3,237

WEIR RD

Good

Over: I-94

IN DETROIT, Wayne, MI

Built 1950 Load: 52.2 t ADT: 9,840

DAVISON RAMP(M-8)

Good

Over: I-75

IN DETROIT OVER I-75 RAMP, Wayne, MI

Built 1969 Load: 52.2 t ADT: 4,275

GROSSE ILE PARKWAY

Good

Over: WEST RIVER ROAD

GROSSE ILE T E/TRENTON CH, Wayne, MI

Built 2019 Load: 52.2 t ADT: 21,198

TOLEDO ROAD

Good

Over: PENNSYLVANIA ROAD

BRNTWN/STHGTEE/ALLEN, Wayne, MI

Built 1959 Load: 52.2 t ADT: 15,779

Showing 9,051-9,100 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.