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

ARVON ROAD

Good

Over: SILVER RIVER

5 MI E OF LANSE, Baraga, MI

Built 1995 Load: 34.7 t ADT: 92

US-127 NB

Good

Over: TOWNLINE CREEK

0.7 MI S OF ROSCOMMON COL, Clare, MI

Built 1962 Load: 34.7 t ADT: 4,213

IRISH ROAD

Good

Over: BLACK CREEK

BET COURT & DAVISON, Genesee, MI

Built 1984 Load: 34.7 t ADT: 18,011

OKEMOS ROAD

Good

Over: RED CEDAR RIVER

0.1 MI N OF S LMTS OF OKE, Ingham, MI

Built 2022 Load: 34.7 t ADT: 29,864

WINN ROAD

Good

Over: SOUTH BR CHIPPEWA RIVER

0.7 M S NE COR SEC 28 T14, Isabella, MI

Built 2002 Load: 34.7 t ADT: 3,408

US-131

Good

Over: BUCK CREEK

1.4 MI S OF WYOMING, Kent, MI

Built 2000 Load: 34.7 t ADT: 61,220

15 MILE ROAD

Good

Over: CEDAR CREEK

0.1 MI E OF ALGOMA AVE, Kent, MI

Built 1965 Load: 34.7 t ADT: 104

US-41 M-26

Good

Over: GRATIOT RIVER

3.4 MI NE OF MOHAWK, Keweenaw, MI

Built 1953 Load: 34.7 t ADT: 3,430

MERRILL ROAD

Good

Over: INDIAN CREEK DRAIN

SEC. 19 BURLINGTON TWP., Lapeer, MI

Built 1995 Load: 34.7 t ADT: 148

MONROE STREET

Good

Over: FARMERS CREEK

520 FT SOUTH OF M21 JUNCT, Lapeer, MI

Built 1982 Load: 34.7 t ADT: 409

M-53 NB

Good

Over: 27 MILE RD

7.1 MI N OF M-59, Macomb, MI

Built 1966 Load: 34.7 t ADT: 20,848

CALLENS RD

Good

Over: SALT RIVER

0.5 SOUTH OF 23 MILE ROAD, Macomb, MI

Built 1983 Load: 34.7 t ADT: 4,200

US-2

Good

Over: BIG CEDAR RIVER

1.3 MI NW OF POWERS, Menominee, MI

Built 2021 Load: 34.7 t ADT: 4,850

FITZGERALD AVE

Good

Over: WHITE RIVER

1 MI NE OF HESPERIA, Newaygo, MI

Built 1994 Load: 34.7 t ADT: 700

80 TH STREET

Good

Over: BUTLER CREEK

4.0 MI S OF FREMONT, Newaygo, MI

Built 2006 Load: 34.7 t ADT: 199

I-75 NB

Good

Over: COOLIDGE RD

IN TROY, Oakland, MI

Built 2019 Load: 34.7 t ADT: 52,934

I-75 BL RMP EN TOP

Good

Over: I-75 SB & I-75BL

9.5 MI E OF PONTIAC, Oakland, MI

Built 2017 Load: 34.7 t ADT: 24,209

10 MILE RD

Good

Over: PEBBLE CREEK

BET INKSTER AND BEECH, Oakland, MI

Built 1984 Load: 34.7 t ADT: 10,737

NAKOMIS

Good

Over: INDIANWOOD LAKE CANAL

1.0 MI N OF INDIANWOOD RD, Oakland, MI

Built 1930 Load: 34.7 t ADT: 150

BROWN CABIN ROAD

Good

Over: BIG CREEK

SEC 12-18 BIG CREEK TWP, Oscoda, MI

Built 2006 Load: 34.7 t ADT: 581

104TH AVE

Good

Over: PIGEON CREEK

SECTION 2 OLIVE TWP, Ottawa, MI

Built 1974 Load: 34.7 t ADT: 100

MESKILL ROAD

Good

Over: TINSMAN DRAIN

SEC. 8-17 COLUMBUS TWP., St. Clair, MI

Built 2016 Load: 34.7 t ADT: 200

BEVENS ROAD

Good

Over: SUCKER CREEK

SEC 17-20 WELLS TWP, Tuscola, MI

Built 1992 Load: 34.7 t ADT: 1,880

I-94 EB

Good

Over: US-24 (TELEGRAPH RD)

IN TAYLOR US-24, Wayne, MI

Built 2004 Load: 34.7 t ADT: 81,200

I-94 WB

Good

Over: US-24(TELEGRAPH RD)

IN TAYLOR US-24, Wayne, MI

Built 2004 Load: 34.7 t ADT: 81,200

US-12 WB

Good

Over: ROUGE RIVER

IN DEARBORN, Wayne, MI

Built 2009 Load: 34.7 t ADT: 15,488

US-12 EB

Good

Over: ROUGE RIVER

IN DEARBORN, Wayne, MI

Built 2009 Load: 34.7 t ADT: 15,488

C AVENUE

Good

Over: AUGUSTA CREEK

ROSS TWP SEC 10&15, Kalamazoo, MI

Built 2019 Load: 34.7 t ADT: 803

CO RD TJ

Good

Over: EAST BR CHOCOLAY RIVER

1.5 MI S OF M-94, Marquette, MI

Built 2002 Load: 34.7 t ADT: 20

I-96 WB

Good

Over: M-231 RAMP

0.2 MI N OF M-104, Ottawa, MI

Built 2013 Load: 34.7 t ADT: 23,300

WEIDMAN ROAD

Good

Over: LEWIS DRAIN

0.6 MI W OF MISSION ROAD, Isabella, MI

Built 2014 Load: 34.7 t ADT: 3,530

MAST RD

Good

Over: ARMS CREEK

0.5 MI N OF WALSH RD, Washtenaw, MI

Built 2018 Load: 34.7 t ADT: 3,435

ISABELLA ROAD

Good

Over: LITTLE SALT RIVER

0.6 M S NE COR SEC 35 T13, Isabella, MI

Built 1993 Load: 34.8 t ADT: 686

BRITTON HWY

Good

Over: MACON RIVER

0.5 MI SOUTH OF WELCH RD, Lenawee, MI

Built 1964 Load: 34.8 t ADT: 1,130

SEVISON ROAD

Good

Over: WHITE PIGEON RIVER

2 MI SE OF WHITE PIGEON, St. Joseph, MI

Built 1984 Load: 34.8 t ADT: 431

MCCULLOCH RD

Good

Over: N BR TOBACCO RIVER

70 RODS N OF CALHOUN RD, Gladwin, MI

Built 1991 Load: 34.9 t ADT: 260

SHAW ROAD

Good

Over: BLACK RIVER

1.8 W & 0.3 S OF ALCONA, Alcona, MI

Built 1994 Load: 35.0 t ADT: 211

OLD SENEY ROAD

Good

Over: SUCKER RIVER

2 MI S GRAND MARAIS FIELD, Alger, MI

Built 2012 Load: 35.0 t ADT: 20

16TH STREET

Good

Over: RABBIT RIVER

HOPKINS TWP SEC 10-11, Allegan, MI

Built 1982 Load: 35.0 t ADT: 120

PARISH ROAD

Good

Over: I-75

5.0 MI N OF KAWKAWLIN, Bay, MI

Built 1968 Load: 35.0 t ADT: 1,278

TIN BRIDGE ROAD

Good

Over: PIGEON RIVER

SEC.28 T33N R1W, Cheboygan, MI

Built 2007 Load: 35.0 t ADT: 30

SHUNK ROAD

Good

Over: CHARLOTTE RIVER

6 MI E OF DAFTER, Chippewa, MI

Built 1985 Load: 35.0 t ADT: 30

IONIA ROAD

Good

Over: SCIPIO CREEK

2 MI N OF VERMONTVILLE, Eaton, MI

Built 1957 Load: 35.0 t ADT: 681

CLAUDE AVE

Good

Over: SWARTZ CREEK

S W CORNER OF FLINT, Genesee, MI

Built 1957 Load: 35.0 t ADT: 56

M-18

Good

Over: S BR LITTLE SUGAR RIVER

2.2 MI SE OF OBERLIN, Gladwin, MI

Built 1923 Load: 35.0 t ADT: 5,963

CHEESMAN ROAD

Good

Over: PINE RIVER

SEC 25 PINE RIVER TWP, Gratiot, MI

Built 1987 Load: 35.0 t ADT: 1,058

M-142

Good

Over: PIGEON RIVER

1.0 MI W OF PIGEON, Huron, MI

Built 2011 Load: 35.0 t ADT: 4,500

WILDER ROAD

Good

Over: PINE CREEK DRAIN

SEC. 11-12 LAPEER TWP., Lapeer, MI

Built 2017 Load: 35.0 t ADT: 3,415

FORRISTER RD

Good

Over: WILKES CREEK

WEST OF SPRINGVILLE HWY, Lenawee, MI

Built 1966 Load: 35.0 t ADT: 559

BLISSFIELD HWY

Good

Over: SWAMP RAISIN DRAIN

0.1 MI NORTH OF MCMAHON, Lenawee, MI

Built 1968 Load: 35.0 t ADT: 954

Showing 7,201-7,250 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.