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

LABO RD

Poor

Over: I-275

6 MI N OF MONROE, Monroe, MI

Built 1973 Load: 24.9 t ADT: 500

BALDWIN ROAD

Poor

Over: GRIFFUS CREEK

0.99 MI E OF FOWLER ROAD, Saginaw, MI

Built 2000 Load: 24.9 t ADT: 63

SCHROEDER ROAD

Poor

Over: BIG POTATO CREEK

0.1 MI E OF MERRILL ROAD, Saginaw, MI

Built 1975 Load: 24.9 t ADT: 187

CENTERLINE ROAD

Poor

Over: STONY CREEK

0.2 MI E OF DEWITT RD, Clinton, MI

Built 1922 Load: 25.1 t ADT: 183

TAFT ROAD

Poor

Over: MAPLE RIVER

0.1 MI W OF SHEPARDSVILLE, Clinton, MI

Built 1924 Load: 25.1 t ADT: 86

MT MORRIS ROAD

Poor

Over: BRENT RUN

BET JENNINGS & CLIO RD, Genesee, MI

Built 1929 Load: 25.3 t ADT: 6,864

MORRISH ROAD

Poor

Over: ALGER CREEK

BET GRAND BLANC & REID RD, Genesee, MI

Built 1928 Load: 25.3 t ADT: 3,044

FR 153 BASSWOOD

Poor

Over: COOKS RUN RIVER

4.0 NW OF BEECHWOOD, Iron, MI

Built 1922 Load: 25.3 t ADT: 119

TREAT HWY

Poor

Over: BLACK CREEK

0.4 MI S OF HORTON RD, Lenawee, MI

Built 1970 Load: 25.3 t ADT: 755

I-75

Poor

Over: CONRAIL RAISIN R FRONT

IN MONROE OVER FRONT ST, Monroe, MI

Built 1955 Load: 25.3 t ADT: 67,800

JANES ROAD

Poor

Over: UNCLE HENRY DRAIN

1.1 MI E OF PORTSMOUTH RD, Saginaw, MI

Built 1980 Load: 25.3 t ADT: 170

LEHRING RD

Poor

Over: SHIAWASSEE RIVER

3.5 MI NW OF BYRON, Shiawassee, MI

Built 1975 Load: 25.3 t ADT: 360

SOUTHFIELD ROAD

Poor

Over: ECORSE CREEK

LINCOLN PK &ECORSE E/FORT, Wayne, MI

Built 1924 Load: 25.3 t ADT: 36,754

DIX ROAD

Poor

Over: ROUGE RIVER

DEARBORN/DETROIT W/MILLER, Wayne, MI

Built 1927 Load: 25.3 t ADT: 11,218

PRICE RD

Poor

Over: STONY CREEK

50 W OF LOOMIS RD, Clinton, MI

Built 1928 Load: 25.5 t ADT: 2,377

RENTON ROAD

Poor

Over: I-94

1.0 MI E OF KALAMAZOO COL, Calhoun, MI

Built 1959 Load: 25.6 t ADT: 60

KRUSE ROAD

Poor

Over: LOCKWOOD DRAIN

1.3 MI N OF RAUCH ROAD, Monroe, MI

Built 1980 Load: 25.6 t ADT: 220

NOTTAWA ROAD

Poor

Over: WOOD LAKE DRAIN

1.5 MI NORTH OF MENDON, St. Joseph, MI

Built 1966 Load: 25.6 t ADT: 1,455

FORD ROAD

Poor

Over: FLEMING CREEK

SUPERIOR TWP SEC 8 & 17, Washtenaw, MI

Built 1981 Load: 25.6 t ADT: 4,165

FIVE MILE ROAD

Poor

Over: UPPER ROUGE RIVER

DETROIT E/TELEGRAPH, Wayne, MI

Built 1963 Load: 25.6 t ADT: 14,707

HOTCHKISS RD

Poor

Over: M-47

2.0 MI S OF US-10, Bay, MI

Built 1966 Load: 25.9 t ADT: 260

M-89

Poor

Over: WABASCON CREEK

2.4 MI E OF KALAMAZOO COL, Calhoun, MI

Built 1947 Load: 25.9 t ADT: 14,726

M DRIVE SOUTH

Poor

Over: ALDER CREEK

4 MI NW OF BURLINGTON, Calhoun, MI

Built 1960 Load: 25.9 t ADT: 119

40TH STREET

Poor

Over: BALDWIN RIVER

2 MI E 1 MI N OF BALDWIN, Lake, MI

Built 1924 Load: 25.9 t ADT: 140

RYAN ROAD

Poor

Over: PICKERAL CREEK

0.8 MI E OF SHARON ROAD, Saginaw, MI

Built 1920 Load: 25.9 t ADT: 51

RANGE LINE ROAD

Poor

Over: FYE DRAIN

SEC 19 BRIDGEHAMPTON TWP, Sanilac, MI

Built 1982 Load: 25.9 t ADT: 225

DURAND ROAD

Poor

Over: NORTHWOOD CREEK

1 MI NW OF NEW LOTHROP, Shiawassee, MI

Built 1930 Load: 25.9 t ADT: 1,409

SIBLEY ROAD

Poor

Over: FRANK & POET DRAIN

RIVERVIEW W/FORT, Wayne, MI

Built 1938 Load: 25.9 t ADT: 20,187

OLD CAMP 4 ROAD

Poor

Over: SAND RIVER

USE LAT LON & HOPE 2 FIND, Marquette, MI

Built 1980 Load: 25.9 t ADT: 5

SALZBURG RD

Poor

Over: M-47

1.0 MI S OF US-10, Bay, MI

Built 1966 Load: 26.2 t ADT: 2,670

OLD MACKINAC TRAIL

Poor

Over: PINE RIVER

3 MI S OF RUDYARD, Chippewa, MI

Built 1931 Load: 26.2 t ADT: 216

VERMONTVILLE HWY

Poor

Over: LITTLE THORNAPPLE RIVER

6 MI NW OF CHARLOTTE, Eaton, MI

Built 1942 Load: 26.2 t ADT: 2,581

YANKEE RD

Poor

Over: BEAR CREEK

0.3 MI WEST OF HODGES HWY, Lenawee, MI

Built 1978 Load: 26.2 t ADT: 94

MASON ROAD

Poor

Over: RED CEDAR RIVER IMP. DRN

SEC 3 IOSCO TWP, Livingston, MI

Built 1990 Load: 26.2 t ADT: 5,110

PALMS ROAD

Poor

Over: UNNAMED CREEK

SEC.25-26 WALES TWP., St. Clair, MI

Built 1983 Load: 26.2 t ADT: 187

WAYNE ROAD

Poor

Over: TONQUISH CREEK

WESTLAND S/JOY, Wayne, MI

Built 1958 Load: 26.2 t ADT: 40,380

NORTH MARSHALL RD

Poor

Over: WARREN BROOK DRAIN 20/31

GIRARD TWP SEC 15-16, Branch, MI

Built 1930 Load: 26.5 t ADT: 1,950

TROWBRIDGE ROAD

Poor

Over: W BR STURGEON RIVER

IN WOLVERINE, Cheboygan, MI

Built 1949 Load: 26.6 t ADT: 520

TYNDALL ROAD

Poor

Over: BIG SABLE RIVER

7 MI E OF FOUNTAIN, Mason, MI

Built 1900 Load: 26.6 t ADT: 200

KNAB RD

Poor

Over: OTTER CREEK

.05 MI N OF S OTTER CK RD, Monroe, MI

Built 1964 Load: 26.6 t ADT: 360

HOFFMAN STREET

Poor

Over: ROCKEY RIVER

0.1 MI E OF US-131, St. Joseph, MI

Built 1960 Load: 26.6 t ADT: 4,600

WARRENDALE DRIVE

Poor

Over: MIDDLE ROUGE RIVER

DBN HTS S/E N HINES DRV, Wayne, MI

Built 1959 Load: 26.6 t ADT: 800

WILLIS ROAD

Poor

Over: PAINT CREEK

AUGUSTA TWP SEC 3 & 10, Washtenaw, MI

Built 1924 Load: 26.8 t ADT: 6,209

HESS ROAD

Poor

Over: GALIEN RIVER

1 MI N OF GALIEN, Berrien, MI

Built 1930 Load: 26.9 t ADT: 36

SHEPARDSVILLE RD

Poor

Over: MAPLE RIVER

1/4 MI N OF WALKER RD, Clinton, MI

Built 1958 Load: 26.9 t ADT: 1,083

COUNTY RD 612

Poor

Over: N BR AU SABLE RIVER

IN LOVELLS, Crawford, MI

Built 1961 Load: 26.9 t ADT: 409

BALDWIN ROAD

Poor

Over: THREAD RIVER

400 FT WEST OF GALE ROAD, Genesee, MI

Built 1928 Load: 26.9 t ADT: 4,097

OLD US 141

Poor

Over: HEMLOCK RIVER

0.2MI S OF AMASA, Iron, MI

Built 1924 Load: 26.9 t ADT: 103

CEMENT CITY ROAD

Poor

Over: GOOSE CREEK

1 MI E OF CEMENT CITY, Jackson, MI

Built 1938 Load: 26.9 t ADT: 2,173

PACKARD RD

Poor

Over: BLACK CREEK

0.2 MI W OF MORSE HWY, Lenawee, MI

Built 1996 Load: 26.9 t ADT: 72

Showing 10,651-10,700 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.