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

MT HOPE

Good

Over: SEBEWA CREEK

3 MI S OF SUNFIELD, Eaton, MI

Built 2020 Load: 69.0 t ADT: 464

NORTH CASS STREET

Good

Over: BOARDMAN RIVER

IN TRAVERSE CITY, Grand Traverse, MI

Built 1960 Load: 69.0 t ADT: 3,533

CUSTER ROAD

Good

Over: WASHBURN CREEK

3 MI S OF COLON, St. Joseph, MI

Built 2009 Load: 69.0 t ADT: 99

2ND STREET

Good

Over: GUN RIVER

APPROX 1/8 MI N OF 118TH, Allegan, MI

Built 2014 Load: 69.3 t ADT: 1,230

LEONARD STREET

Good

Over: CROCKERY CREEK

0.17 MILES E OF 112TH AVE, Ottawa, MI

Built 1999 Load: 69.3 t ADT: 2,980

M-81

Good

Over: MARSH DRAIN

3.7 MI W OF SANILAC COL, Tuscola, MI

Built 2007 Load: 69.3 t ADT: 6,273

BRUSH ST ENTR RMP

Good

Over: I-75 SB TO EB RAMP

I-75 & I-375 INTERCHANGE, Wayne, MI

Built 1970 Load: 69.3 t ADT: 3,300

WERTH ROAD

Good

Over: MUD CREEK

1.5 MI SW OF ALPENA, Alpena, MI

Built 2019 Load: 69.7 t ADT: 5,325

KAISER TOWER ROAD

Good

Over: TEBO DRAIN

100 FT N OF COGGINS RD, Bay, MI

Built 2021 Load: 69.7 t ADT: 271

VINTON AVE

Good

Over: UNNAMED CREEK

0.10 MI N OF HAYES, Kent, MI

Built 1979 Load: 69.7 t ADT: 684

9 MILE ROAD

Good

Over: THORNTON CREEK

0.06 MI E OF NOVI RD, Oakland, MI

Built 1990 Load: 69.7 t ADT: 11,126

2ND STREET

Good

Over: GUN RIVER

APPROX 1/4 MI N OF 112TH, Allegan, MI

Built 2012 Load: 70.0 t ADT: 580

10TH STREET

Good

Over: RABBIT RIVER DRAIN

LEIGHTON TWP SEC 31-32, Allegan, MI

Built 2009 Load: 70.0 t ADT: 1,271

ASHFIELD ST

Good

Over: FLAT RIVER

IN BELDING, Ionia, MI

Built 1994 Load: 70.1 t ADT: 1,733

PLYMOUTH ROAD

Good

Over: FLEMING CREEK

SUPERIOR TWP SECTION 8, Washtenaw, MI

Built 2009 Load: 70.1 t ADT: 8,188

ALGOMA AVE

Good

Over: CEDAR CREEK

0.25 MI N OF 14 MILE RD, Kent, MI

Built 1935 Load: 70.3 t ADT: 3,725

N SAGINAW ROAD

Good

Over: BIG SALT RIVER

0.15 MI NW OF 11 MILE RD, Midland, MI

Built 2001 Load: 70.3 t ADT: 2,705

CARLSON RD

Good

Over: DICKERSON CREEK

0.9 MI N OF FENWICK RD, Montcalm, MI

Built 2013 Load: 70.3 t ADT: 132

HEMLOCK ROAD

Good

Over: SOUTH BRANCH BAD RIVER

0.5 MI N OF MARION ROAD, Saginaw, MI

Built 1954 Load: 70.3 t ADT: 2,529

M-6 WB

Good

Over: MILLER DRAIN

JAMESTOWN TWP SEC 1, Ottawa, MI

Built 2002 Load: 70.3 t ADT: 20,525

M-123

Good

Over: BLACK CREEK

3.1 MI S OF PARADISE, Chippewa, MI

Built 2018 Load: 70.3 t ADT: 1,200

SULLIVAN ROAD

Good

Over: PINE RIVER

2.5 MI N OF FIBRE, Chippewa, MI

Built 2010 Load: 70.6 t ADT: 179

COUNTY ROAD F 4

Good

Over: DAYS RIVER

1.5 M W 0.5 M N BRAMPTON, Delta, MI

Built 2015 Load: 70.6 t ADT: 88

CO RD 611

Good

Over: BOARDMAN RIVER

3.7M N &.8M E OF KINGSLEY, Grand Traverse, MI

Built 1947 Load: 70.6 t ADT: 10,294

DENNISON RD

Good

Over: N DR MID BR MACON R

1.25 MI N OF M 50, Monroe, MI

Built 2011 Load: 70.6 t ADT: 430

US-131 NB

Good

Over: HERSEY RD (2 MILE RD)

2.5 MI SW REED CITY, Osceola, MI

Built 1984 Load: 70.6 t ADT: 6,322

I-94 WB

Good

Over: E BR OF PAW PAW RIVER

1.4 MI E OF M-40, Van Buren, MI

Built 1960 Load: 70.6 t ADT: 18,138

AAA ROAD

Good

Over: SALMON TROUT RIVER

CHAMPION TWP SEC 4, Marquette, MI

Built 2014 Load: 70.6 t ADT: 1,400

BATTERSON ROAD

Good

Over: AU SABLE RIVER

1.5 MI SOUTH OF FREDERIC, Crawford, MI

Built 1979 Load: 71.0 t ADT: 120

BALLENGER HIGHWAY

Good

Over: SWARTZ CREEK

0.25 MILE SOUTH OF MILLER, Genesee, MI

Built 2015 Load: 71.0 t ADT: 14,060

COLE ROAD

Good

Over: SHIAWASSEE RIVER

0.40 MI NE OF SEYMOUR RD, Genesee, MI

Built 1937 Load: 71.0 t ADT: 108

THIRTY-SIXTH ST

Good

Over: DORRANCE CREEK

1.5 MI S OF SCOTTS, Kalamazoo, MI

Built 2018 Load: 71.0 t ADT: 1,835

GD RIV ENT TO I94W

Good

Over: RAMP TO I-94

IN DETROIT OVER I94WB TO, Wayne, MI

Built 1971 Load: 71.0 t ADT: 12,580

PARK ST

Good

Over: AXTELL CREEK

CITY OF KALAMAZOO, Kalamazoo, MI

Built 2012 Load: 71.0 t ADT: 12,600

GARFIELD ROAD

Good

Over: WALDO DRAIN

0.25 MI N OF BEAVER RD, Bay, MI

Built 1931 Load: 71.3 t ADT: 2,253

WARREN ROAD

Good

Over: TALLAHASSEE CREEK DRAIN

OVID TWP SEC 24 25, Branch, MI

Built 2009 Load: 71.3 t ADT: 350

DUFFIELD ROAD

Good

Over: JONES CREEK

BET GRAND BLANC & REID RD, Genesee, MI

Built 2016 Load: 71.3 t ADT: 1,365

COUNTY RD 478

Good

Over: BLACK RIVER

3 MILES N E OF REPUBLIC, Marquette, MI

Built 2019 Load: 71.3 t ADT: 44

FX ROAD

Good

Over: MIDDLE BR OF ESCANABA RI

0.3 MI N OF HUMBOLDT, Marquette, MI

Built 2020 Load: 71.3 t ADT: 120

GARLOCK ROAD

Good

Over: BUTTERNUT CREEK

BLOOMER TWP SEC 11, Montcalm, MI

Built 2016 Load: 71.3 t ADT: 850

COUNTY ROAD G 17

Good

Over: DAYS RIVER

2.5 M W 1.5 M S PERKINS, Delta, MI

Built 2018 Load: 71.6 t ADT: 26

SB I-75 RMP TO TP

Good

Over: I-75 AND I-96

AMBASSADOR GATEWAY, Wayne, MI

Built 2007 Load: 71.6 t ADT: 14,204

22 MILE ROAD

Good

Over: ST JOSEPH RIVER

CLARENDON TWP SEC 10, Calhoun, MI

Built 2011 Load: 71.9 t ADT: 950

EAST HIGH STREET

Good

Over: GRAND RIVER

600 FT N OF MICOR DRIVE, Jackson, MI

Built 1963 Load: 71.9 t ADT: 5,328

E MAIN STREET

Good

Over: SILVER CREEK

0.34 MI EAST OF M-156, Lenawee, MI

Built 2020 Load: 71.9 t ADT: 3,000

M-59 EB

Good

Over: GLOEDE DRAIN

3.1 MI E OF M-53, Macomb, MI

Built 1993 Load: 71.9 t ADT: 40,518

29 MILE ROAD

Good

Over: EAST BRANCH COON CREEK

0.2 MI EAST OF OMO ROAD, Macomb, MI

Built 2005 Load: 71.9 t ADT: 210

58 TH ST

Good

Over: BIGELOW CREEK

4 MI NE OF NEWAYGO, Newaygo, MI

Built 2021 Load: 71.9 t ADT: 100

US-45

Good

Over: E BR BALTIMORE RIVER

4.5 MI S BRUCE CROSSING, Ontonagon, MI

Built 2015 Load: 71.9 t ADT: 1,450

LEE HILL ROAD

Good

Over: SUCKER CREEK DRAIN

SEC 32 WELLS TWP, Tuscola, MI

Built 2021 Load: 71.9 t ADT: 285

Showing 9,801-9,850 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.