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

19 MILE ROAD

Fair

Over: CHIPPEWA RIVER

2.2 MI E OF M-66, Mecosta, MI

Built 1974 Load: 22.0 t ADT: 224

D-1 ROAD

Fair

Over: CEDAR RIVER

3.5 MI. SE OF HOULE, Menominee, MI

Built 1976 Load: 22.0 t ADT: 30

STRASBURG ROAD

Fair

Over: PITTS DRAIN

0.25 MI N OF DUNBAR ROAD, Monroe, MI

Built 1975 Load: 22.0 t ADT: 1,530

WOODWARD U TURN W

Fair

Over: I-696

IN ROYAL OAK, Oakland, MI

Built 1986 Load: 22.0 t ADT: 20,000

RIVERVIEW DR

Fair

Over: ROUGE RIVER

0.1 MI E OF LAHSER RD, Oakland, MI

Built 1963 Load: 22.0 t ADT: 326

OHARA ROAD

Fair

Over: WEEKS DRAIN

0.4 MI E OF FENMORE ROAD, Saginaw, MI

Built 1973 Load: 22.0 t ADT: 70

RANGE LINE ROAD

Fair

Over: BERRY DRAIN

SEC 19 BRIDGEHAMPTON TWP, Sanilac, MI

Built 1982 Load: 22.0 t ADT: 225

HARRINGTON ROAD

Fair

Over: SPEAKER-MAPLE VALLEY DRN

SEC 21-28 ELK TWP, Sanilac, MI

Built 1960 Load: 22.0 t ADT: 300

ARKONA ROAD

Fair

Over: BRADSHAW DRAIN

SUMPTER W/KARR, Wayne, MI

Built 1981 Load: 22.0 t ADT: 100

FOREST ROAD 2270

Fair

Over: STURGEON RIVER

S END OF PRICKETT LAKE, Houghton, MI

Built 1954 Load: 22.0 t ADT: 50

NOVI RD

Fair

Over: ROUGE RIVER

BET 8 AND 9 MILE RDS, Oakland, MI

Built 1959 Load: 22.2 t ADT: 23,351

KNOX RD

Fair

Over: I-96

0.3 MI W OF PORTLAND, Ionia, MI

Built 1959 Load: 22.4 t ADT: 530

ROBERTS ROAD

Fair

Over: TUPPER CREEK

0.125 MI E OF LAKE ODESSA, Ionia, MI

Built 1988 Load: 22.4 t ADT: 193

29TH STREET

Fair

Over: PORTAGE RIVER

1 MI S OF INDIAN LAKE, Kalamazoo, MI

Built 1962 Load: 22.4 t ADT: 784

LOOMIS STREET

Fair

Over: NASH CREEK

350 FT N OF DIVISION ST, Kent, MI

Built 1920 Load: 22.4 t ADT: 400

BYRON ROAD

Fair

Over: STONER CREEK

SEC 15 COHOCTAH TWP, Livingston, MI

Built 1947 Load: 22.4 t ADT: 249

SAGINAW ROAD

Fair

Over: TITTABAWASEE RIVER

IN SANFORD, Midland, MI

Built 1932 Load: 22.4 t ADT: 7,544

MINX ROAD

Fair

Over: LOCKWOOD DRAIN

0.2 MI N OF YARGERVILLE R, Monroe, MI

Built 1987 Load: 22.4 t ADT: 40

MUSSON ROAD

Fair

Over: FLAT RIVER

0.25 MI N OF CO 544, Montcalm, MI

Built 1978 Load: 22.4 t ADT: 577

STERNBERG ROAD

Fair

Over: NORRIS CREEK

0.2 MI W OF HILTONPARK RD, Muskegon, MI

Built 1900 Load: 22.4 t ADT: 2,310

120TH AVE

Fair

Over: S BRANCH PENTWATER RIVER

.25 MI NORTH OF LEVER RD, Oceana, MI

Built 1955 Load: 22.4 t ADT: 500

LANSING ROAD

Fair

Over: WEBB CREEK DRAIN

3 MILES NE OF DURAND, Shiawassee, MI

Built 1994 Load: 22.4 t ADT: 6,033

M-86

Fair

Over: SWAN CREEK

IN COLON, St. Joseph, MI

Built 2008 Load: 22.4 t ADT: 4,063

RIVER RD

Fair

Over: COLDWATER RIVER

0.4 MI E OF S WOODRUFF RD, Isabella, MI

Built 1964 Load: 22.4 t ADT: 1,637

4 MILE RD

Fair

Over: INDIAN MILL CREEK

0.04 MI W OF WALKER AVE, Kent, MI

Built 1918 Load: 22.6 t ADT: 8,072

N PAW PAW STREET

Fair

Over: MILL RACE

VILLAGE OF LAWRENCE, Van Buren, MI

Built 1940 Load: 22.6 t ADT: 5,367

NORTH THAYER ROAD

Fair

Over: CISCO BR ONTONAGON RIVER

SEC 32 MARENISCO TWP, Gogebic, MI

Built 1954 Load: 22.7 t ADT: 46

HUBBARDSTON ROAD

Fair

Over: STONEY CREEK

.5 MI S PEWAMO VILL LIMIT, Ionia, MI

Built 1959 Load: 22.7 t ADT: 1,201

BONANZA ROAD

Fair

Over: TUPPER CREEK

0.5 MILE EAS OF LAKE ODES, Ionia, MI

Built 1973 Load: 22.7 t ADT: 135

MAPLE ROAD

Fair

Over: COUNTY DRAIN

1.56 MI W OF CLINTONIA RD, Ionia, MI

Built 1975 Load: 22.7 t ADT: 78

DARWIN ROAD

Fair

Over: HONEY CREEK

SEC 25 PUTNAM TWP, Livingston, MI

Built 1956 Load: 22.7 t ADT: 729

PRATT ROAD

Fair

Over: EAST BRANCH COON CREEK

0.4 MI WEST OF NORTH AVE, Macomb, MI

Built 1953 Load: 22.7 t ADT: 490

JOHNSON RD

Fair

Over: ROBINSON CREEK

0.5 MI E OF 132ND AVE, Oceana, MI

Built 1968 Load: 22.7 t ADT: 150

M-18

Fair

Over: S BR AU SABLE RIVER

E LTS OF ROSCOMMON, Roscommon, MI

Built 1935 Load: 22.7 t ADT: 5,505

LAINGSBURG RD

Fair

Over: LOOKINGGLASS RIVER

0.75 MI S OF LAINGSBURG, Shiawassee, MI

Built 1961 Load: 22.7 t ADT: 357

ENGLEHART ROAD

Fair

Over: WHITE CREEK I/C DRAIN

SEC 22-23 NOVESTA TWP, Tuscola, MI

Built 1962 Load: 22.7 t ADT: 525

BEECH-DALY ROAD

Fair

Over: BELL CREEK

REDFORD TWP S/FIVE MILE, Wayne, MI

Built 1933 Load: 22.7 t ADT: 24,472

DENTON DRIVE

Fair

Over: RED RUN DRAIN

0.23 KM N OF CHICAGO RD, Macomb, MI

Built 1962 Load: 22.7 t ADT: 2,543

WHITNEYVILLE AVE

Fair

Over: NO NAME CREEK

0.95 MI N OF 60TH ST, Kent, MI

Built 1926 Load: 22.9 t ADT: 4,776

44TH STREET

Fair

Over: SWAN CREEK

JUST N OF 106TH AVE, Allegan, MI

Built 1969 Load: 23.0 t ADT: 392

BEAVER ROAD

Fair

Over: WALDO DRAIN

500 FT W OF ELEVEN MI RD, Bay, MI

Built 1932 Load: 23.0 t ADT: 1,075

BEAVER ROAD

Fair

Over: KAWKAWLIN RIVER

200 FT W OF FOUR MILE RD, Bay, MI

Built 1928 Load: 23.0 t ADT: 3,404

FLETCHER RD

Fair

Over: US-127 NB

2.4 MI NE OF ROSCOMMON CO, Crawford, MI

Built 1967 Load: 23.0 t ADT: 200

GRAMER ROAD

Fair

Over: RED CEDAR RIVER

2 MI NE OF WEBBERVILLE, Ingham, MI

Built 1954 Load: 23.0 t ADT: 1,851

KEEFER RD

Fair

Over: I-96

6.4 MI E OF M-66, Ionia, MI

Built 1958 Load: 23.0 t ADT: 320

WINSLOW ROAD

Fair

Over: WESTON DRAIN EXTENSION

SEC 35-36 ATTICA TWP, Lapeer, MI

Built 1945 Load: 23.0 t ADT: 345

TURNERVILLE ROAD

Fair

Over: N BRANCH CLAM RIVER

SECTION 35/36 T21N R7W, Missaukee, MI

Built 1987 Load: 23.0 t ADT: 191

BAY CREEK ROAD

Fair

Over: LITTLE LAKE CREEK

1 MI N OF SUMMIT STREET, Monroe, MI

Built 1955 Load: 23.0 t ADT: 140

SHEICK ROAD

Fair

Over: SANDY CREEK

0.15 MI S OF BLUEBUSH RD, Monroe, MI

Built 1985 Load: 23.0 t ADT: 230

US-24 & US-10

Fair

Over: FRANKLIN RIVER

IN BINGHAM FARMS, Oakland, MI

Built 1931 Load: 23.0 t ADT: 78,752

Showing 351-400 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.