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

WILLIAMS ROAD

Poor

Over: KALAMAZOO RIVER

APPROX 1.0 MI N OF 110TH, Allegan, MI

Built 1968 Load: 22.0 t ADT: 714

FRASER ST

Poor

Over: KAWKAWLIN RIVER

100 E OF CHIP RD., Bay, MI

Built 1959 Load: 22.0 t ADT: 784

RIVER ROAD

Poor

Over: HOG CREEK

GIRARD TWP SEC 17-18, Branch, MI

Built 1963 Load: 22.0 t ADT: 207

CLARK RD

Poor

Over: BR OF LOOKING GLASS RIVR

0.75 MI W OF CHANDLER RD, Clinton, MI

Built 1963 Load: 22.0 t ADT: 4,198

LUMBER JACK ROAD

Poor

Over: PINE RIVER

SEC 18 SEVILLE TWP, Gratiot, MI

Built 1947 Load: 22.0 t ADT: 1,190

RIVERVIEW DRIVE

Poor

Over: DRAIN #96

SEC 5 ARCADA TWP, Gratiot, MI

Built 1968 Load: 22.0 t ADT: 790

WALDO ROAD

Poor

Over: DEER CREEK DRAIN

4 MI NW OF DANSVILLE, Ingham, MI

Built 1967 Load: 22.0 t ADT: 320

HORTON RD

Poor

Over: BLACK CREEK

0.5 MI W OF HODGES HWY, Lenawee, MI

Built 1993 Load: 22.0 t ADT: 148

PARSHALLVILLE ROAD

Poor

Over: NORTH ORE CREEK

HARTLAND TWP SEC 6, Livingston, MI

Built 1938 Load: 22.0 t ADT: 670

ROUTE 342

Poor

Over: MENOMINEE RIVER

2.5 MI W OF WALLACE, Menominee, MI

Built 1967 Load: 22.0 t ADT: 749

PINE RIVER ROAD

Poor

Over: PINE RIVER

0.15 MI W OF WOODCOCK RD, Midland, MI

Built 1970 Load: 22.0 t ADT: 2,161

BUECHE ROAD

Poor

Over: NORTHWOOD DRAIN

0.3 MI N OF CHESANING RD, Saginaw, MI

Built 1926 Load: 22.0 t ADT: 67

HARRISON ST

Poor

Over: S BR ECORSE RIVER

IN LINCOLN PARK, Wayne, MI

Built 1965 Load: 22.0 t ADT: 1,100

XY AVENUE

Poor

Over: BEAR CREEK

BRADY TWP SEC 27, Kalamazoo, MI

Built 1977 Load: 22.0 t ADT: 70

JERUSALEM ROAD

Poor

Over: MILL CREEK

LIMA TWP SEC 23 & 26, Washtenaw, MI

Built 1974 Load: 22.2 t ADT: 129

COOK ROAD

Poor

Over: JONES CREEK

800 FT WEST OF NICHOLS, Genesee, MI

Built 1937 Load: 22.4 t ADT: 197

SUNSET DRIVE - 3RD

Poor

Over: FLINT RIVER

IN FLINT, Genesee, MI

Built 1957 Load: 22.4 t ADT: 4,519

HIGHWOOD ROAD

Poor

Over: TITTABAWASEE RIVER

3.5 MI E OF M 30, Gladwin, MI

Built 1984 Load: 22.4 t ADT: 495

CROCKER BLVD

Poor

Over: CLINTON RIVER

E OF M3 NB, Macomb, MI

Built 1960 Load: 22.4 t ADT: 11,736

FORWARD ROAD

Poor

Over: CLAM RIVER

SECTION 1 T21N R7W, Missaukee, MI

Built 1958 Load: 22.4 t ADT: 1,316

SASHABAW RD

Poor

Over: CLINTON RIVER

BET WALTON AND PELTON RDS, Oakland, MI

Built 1928 Load: 22.4 t ADT: 15,800

WADSWORTH RD

Poor

Over: I-75

1.0 MI S OF M-81, Saginaw, MI

Built 1961 Load: 22.4 t ADT: 360

MOORE ROAD

Poor

Over: COLE DRAIN

0.1 MI E OF CRESSWELL RD, Saginaw, MI

Built 1924 Load: 22.4 t ADT: 39

CHERRY HILL RD

Poor

Over: FLEMING CREEK

SUPERIOR TWP SEC 18, Washtenaw, MI

Built 1980 Load: 22.4 t ADT: 1,941

JONES ROAD

Poor

Over: WIEBER CREEK

0.2 MI N OF TOWNSEND RD, Clinton, MI

Built 1924 Load: 22.5 t ADT: 86

ORLAND ROAD

Poor

Over: HOG CREEK DRAIN #40

BRONSON TWP SEC 25-26, Branch, MI

Built 1928 Load: 22.7 t ADT: 830

EAST GANSON STREET

Poor

Over: GRAND RIVER

400 FT E OF N JACKSON ST, Jackson, MI

Built 1956 Load: 22.7 t ADT: 11,402

BOHMS ROAD

Poor

Over: MADISON DRAIN

SEC. 9 GOODLAND TWP., Lapeer, MI

Built 1930 Load: 22.7 t ADT: 158

FOWLERVILLE ROAD

Poor

Over: RED CEDAR RIVER

SEC 22-23 HANDY TWP, Livingston, MI

Built 1961 Load: 22.7 t ADT: 4,150

WILLOW BEACH ROAD

Poor

Over: CHANNEL DOLLAR & CASS LK

CITY OF KEEGO HARBOR, Oakland, MI

Built 1984 Load: 22.7 t ADT: 480

BOND FALLS ROAD

Poor

Over: MID BR ONTONAGON RIVER

4 MI E OF HWY 45, Ontonagon, MI

Built 1940 Load: 22.7 t ADT: 400

WICKIE ROAD

Poor

Over: LAMB CREEK

0.9 MI E OF STEEL ROAD, Saginaw, MI

Built 1973 Load: 22.7 t ADT: 38

NEW LOTHROP ROAD

Poor

Over: SHIAWASSEE RIVER

0.5 MILE WEST OF BYRON, Shiawassee, MI

Built 1955 Load: 22.7 t ADT: 2,055

OAK ROAD

Poor

Over: GOODING CREEK

SEC 26-27 VASSAR TWP, Tuscola, MI

Built 1965 Load: 22.7 t ADT: 510

WYMAN ROAD

Poor

Over: SOUTH BR CHIPPEWA RIVER

SEC 20-21 SHERMAN TWP, Isabella, MI

Built 1941 Load: 22.8 t ADT: 233

DENVER ROAD

Poor

Over: NORTH BR CHIPPEWA RIVER

SEC 1-12 NOTTAWA TWP, Isabella, MI

Built 1937 Load: 22.9 t ADT: 123

HOAGLAND HWY

Poor

Over: SWAMP RAISIN DRAIN

0.3 MI N OF LABERDEE RD, Lenawee, MI

Built 1910 Load: 22.9 t ADT: 45

EMMONS ST

Poor

Over: S BR ECORSE RIVER

IN LINCOLN PARK, Wayne, MI

Built 1964 Load: 22.9 t ADT: 1,000

FRANK ST

Poor

Over: N BR ECORSE RIVER

IN LINCOLN PARK, Wayne, MI

Built 1948 Load: 22.9 t ADT: 450

SPRINGPORT ROAD

Poor

Over: SANDSTONE CREEK

2 MI S OF TOMPKINS CENTER, Jackson, MI

Built 1973 Load: 23.0 t ADT: 700

OTTAWA LAKE ROAD

Poor

Over: OTTAWA LAKE DRAIN

.15 MI E OF LENAWEE CO LI, Monroe, MI

Built 1900 Load: 23.0 t ADT: 480

TODD ROAD

Poor

Over: LOCKWOOD DRAIN

0.6 MI E OF DOUGLAS ROAD, Monroe, MI

Built 1979 Load: 23.0 t ADT: 260

SHARON ROAD

Poor

Over: DEER CREEK

0.4 MI N OF GARY ROAD, Saginaw, MI

Built 1987 Load: 23.0 t ADT: 540

118TH AVE

Poor

Over: SWAN CREEK

APPROX 1/4 MI W OF 44TH S, Allegan, MI

Built 1924 Load: 23.2 t ADT: 1,077

GARFIELD RD

Poor

Over: HARRINGTON DRAIN

1000 FT N OF KLEIN RD, Macomb, MI

Built 1970 Load: 23.2 t ADT: 13,700

R DRIVE SOUTH

Poor

Over: ST JOSEPH RIVER

2 1/2 MI SW OF HOMER, Calhoun, MI

Built 1973 Load: 23.3 t ADT: 78

BLUE SCHOOL ROAD

Poor

Over: WHITE PIGEON RIVER

3 MI S OF CONSTANTINE, St. Joseph, MI

Built 1978 Load: 23.3 t ADT: 502

WILSON ROAD

Poor

Over: BUTTERNUT CREEK

FOREST TWP SEC 19 & 30, Genesee, MI

Built 1926 Load: 23.3 t ADT: 366

REDMAN ROAD

Poor

Over: NORTH MACON CREEK

0.6 MI W OF DENNISON ROAD, Monroe, MI

Built 1987 Load: 23.6 t ADT: 60

FREEWAY TRAIL

Poor

Over: STURGEON RIVER

SEC 20 T33N R2W, Cheboygan, MI

Built 1978 Load: 23.7 t ADT: 30

Showing 10,551-10,600 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.