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

DUNHAM ROAD

Fair

Over: LITTLE PRESQUE ISLE RIV

SEC 14 MARENISCO TWP, Gogebic, MI

Built 1990 Load: 35.0 t ADT: 120

I-496 WB SERV&RP Q

Fair

Over: HOSMER STREET

IN LANSING, Ingham, MI

Built 1970 Load: 35.0 t ADT: 33,453

US-127 NB

Fair

Over: KALAMAZOO ST

IN LANSING (KALAMAZOO ST), Ingham, MI

Built 1970 Load: 35.0 t ADT: 33,069

US-23

Fair

Over: TAWAS RIVER

IN TAWAS CITY, Iosco, MI

Built 1984 Load: 35.0 t ADT: 15,836

I-96 EB

Fair

Over: MONROE AVE

IN GRAND RAPIDS, Kent, MI

Built 1962 Load: 35.0 t ADT: 23,263

I-196 EB M-21

Fair

Over: MONROE

IN GRAND RAPIDS, Kent, MI

Built 1964 Load: 35.0 t ADT: 34,546

I-296 WB/US-131 SB

Fair

Over: ANN STREET

IN GRAND RAPIDS (ANN ST), Kent, MI

Built 1962 Load: 35.0 t ADT: 47,650

I-96 WB

Fair

Over: MDOT RR CORRIDOR

2.2 MI SE OF M-155, Livingston, MI

Built 1962 Load: 35.0 t ADT: 26,743

KENNETH ROAD

Fair

Over: N BRANCH CARP RIVER

3 M S & 5 M E OF OZARK, Mackinac, MI

Built 1949 Load: 35.0 t ADT: 70

26 MILE ROAD

Fair

Over: PRICE BROOK DRAIN

2.7 MILES EAST OF M-53, Macomb, MI

Built 1972 Load: 35.0 t ADT: 14,020

COUNTY ROAD 550

Fair

Over: DEAD RIVER

IN MARQUETTE, Marquette, MI

Built 1995 Load: 35.0 t ADT: 2,812

DICKENSON ROAD

Fair

Over: ONION CREEK

0.3 S. OF SALT RIVER ROAD, Midland, MI

Built 1991 Load: 35.0 t ADT: 45

US-23 SB

Fair

Over: TEN MILE CREEK

0.5 MI N OHIO STATE LINE, Monroe, MI

Built 1959 Load: 35.0 t ADT: 19,270

DUNBAR RD

Fair

Over: I-75

2.8 MI SW OF M-50, Monroe, MI

Built 1955 Load: 35.0 t ADT: 400

EXETER RD

Fair

Over: STONY CREEK

.10 MI NO OF STONY CR RD, Monroe, MI

Built 1973 Load: 35.0 t ADT: 2,080

M-57

Fair

Over: DICKERSON CREEK

2.7 MI W OF M-66, Montcalm, MI

Built 1953 Load: 35.0 t ADT: 8,322

M-120

Fair

Over: CEDAR CREEK

8.6 MI NE OF US-31, Muskegon, MI

Built 1929 Load: 35.0 t ADT: 7,230

US-31 NB

Fair

Over: WHITE RIVER

1.3 MI N OF S JCT US-31BR, Muskegon, MI

Built 1965 Load: 35.0 t ADT: 9,550

SANTA BARBARA U EA

Fair

Over: I-696

IN LATHRUP VILLAGE, Oakland, MI

Built 1987 Load: 35.0 t ADT: 1,500

LONG BRIDGE RD

Fair

Over: PENTWATER RIVER

1 MI SE OF PENTWATER, Oceana, MI

Built 1964 Load: 35.0 t ADT: 2,000

72 ND AVE

Fair

Over: S BR PENTWATER RIVER

0.4 MI N OF HARRISON RD, Oceana, MI

Built 1988 Load: 35.0 t ADT: 1,900

M-55

Fair

Over: AU GRES RIVER

1.4 MI W OF IOSCO CO LINE, Ogemaw, MI

Built 1929 Load: 35.0 t ADT: 3,875

I-75 SB

Fair

Over: SKI PARK RD

3 MI W OF WEST BRANCH, Ogemaw, MI

Built 1972 Load: 35.0 t ADT: 7,368

M-115

Fair

Over: MUSKEGON RIVER

0.2 MI NW OF CLARE COL, Osceola, MI

Built 1939 Load: 35.0 t ADT: 4,707

HERSEY ROAD

Fair

Over: MUSKEGON RIVER

SECTION 19/20 T17N R9W, Osceola, MI

Built 1977 Load: 35.0 t ADT: 1,272

14 MILE RD

Fair

Over: MIDDLE BRANCH RIVER

SECTION 24/25 T19N R7W, Osceola, MI

Built 1993 Load: 35.0 t ADT: 60

QUINCY STREET

Fair

Over: PINE CREEK

SECTION 7 HOLLAND TWP, Ottawa, MI

Built 1972 Load: 35.0 t ADT: 6,970

POLK STREET

Fair

Over: SAWYER CREEK

SECTION 16 OLIVE TWP, Ottawa, MI

Built 1986 Load: 35.0 t ADT: 515

80TH AVE

Fair

Over: BLACK CREEK

SECTION 32 ZEELAND TWP, Ottawa, MI

Built 1972 Load: 35.0 t ADT: 200

MAPLE ROAD

Fair

Over: BIRCH RUN CREEK

0.7 MI N OF CANADA ROAD, Saginaw, MI

Built 1920 Load: 35.0 t ADT: 2,219

FENMORE ROAD

Fair

Over: BEAVER CREEK

0.2 MI N OF LAKEFIELD RD, Saginaw, MI

Built 1973 Load: 35.0 t ADT: 168

RUTH ROAD

Fair

Over: BLACK RIVER I/C DRAIN

SEC 29-30 BRIDGEHAMPTON, Sanilac, MI

Built 1952 Load: 35.0 t ADT: 3,325

TAYLOR DAM ROAD

Fair

Over: FOX RIVER

0.1 MI N OF COUNTY RD 450, Schoolcraft, MI

Built 1999 Load: 35.0 t ADT: 42

M-52

Fair

Over: SHIAWASSEE RIVER

IN OWOSSO, Shiawassee, MI

Built 2004 Load: 35.0 t ADT: 11,489

WATERWORKS DRIVE

Fair

Over: UNNAMED CANAL

SEC. 22 IRA TWP., St. Clair, MI

Built 1977 Load: 35.0 t ADT: 126

PARK AVENUE

Fair

Over: MILL CREEK

CITY OF YALE, St. Clair, MI

Built 1940 Load: 35.0 t ADT: 4,157

WATTLES RD OLD M78

Fair

Over: BEAR CREEK

EAST OF COLON, St. Joseph, MI

Built 1950 Load: 35.0 t ADT: 1,496

COTTRELL ROAD

Fair

Over: SAGINAW VALLEY RR

SEC 11-12 TUSCOLA TWP, Tuscola, MI

Built 2001 Load: 35.0 t ADT: 965

I-94 EB

Fair

Over: PINE CREEK

2.7 MI E OF BERRIEN COL, Van Buren, MI

Built 1960 Load: 35.0 t ADT: 16,700

US-12 BR HURON ST

Fair

Over: I-94

S LTS OF YPSILANTI, Washtenaw, MI

Built 1969 Load: 35.0 t ADT: 18,300

WOODSIDE AVE

Fair

Over: I-94

IN HARPER WOODS, Wayne, MI

Built 1959 Load: 35.0 t ADT: 990

HAMILTON AVENUE

Fair

Over: M-10

0.1 MI E OF CHICAGO BLVD, Wayne, MI

Built 1954 Load: 35.0 t ADT: 15,300

SCOTTEN AVE

Fair

Over: I-96

IN DETROIT, Wayne, MI

Built 1972 Load: 35.0 t ADT: 6,440

OAKWOOD BLVD

Fair

Over: M-39

IN ALLEN PARK, Wayne, MI

Built 1964 Load: 35.0 t ADT: 26,116

7 MI RD

Fair

Over: M-39

IN DETROIT, Wayne, MI

Built 1963 Load: 35.0 t ADT: 30,550

WAYNE ROAD

Fair

Over: LOWER ROUGE RIVER

WAYNE N/MICHIGAN, Wayne, MI

Built 1983 Load: 35.0 t ADT: 19,500

US-127 NB

Fair

Over: LOOKING GLASS RIVER

DEWITT TWP SEC 2, Clinton, MI

Built 1997 Load: 35.0 t ADT: 14,359

E 13TH ST

Fair

Over: US-131

HARING TWP SEC 27 & 34, Wexford, MI

Built 1997 Load: 35.0 t ADT: 77,777

SALINE-WATERWORKS

Fair

Over: TRIB TO SALINE RIVER

LODI TWP .25 MI E OF DELL, Washtenaw, MI

Built 1990 Load: 35.0 t ADT: 880

US-131 SB

Fair

Over: BOG

HARING TWP SEC 15, Wexford, MI

Built 2000 Load: 35.0 t ADT: 3,575

Showing 2,251-2,300 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.