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

NORTH ROAD

Poor

Over: SHIAWASSEE RIVER

IN FENTON, Genesee, MI

Built 1958 Load: 10.4 t ADT: 8,500

NORTH AVE

Poor

Over: E B COON CREEK

0.3MI NORTH OF 26 MILE RD, Macomb, MI

Built 1977 Load: 10.4 t ADT: 8,890

ROMEO PLANK ROAD

Poor

Over: NEWLAND DRAIN

0.2 MI SOUTH OF IRWIN RD, Macomb, MI

Built 1971 Load: 10.4 t ADT: 410

HAMILTON ROAD

Poor

Over: BLACK RIVER

CITY OF BANGOR, Van Buren, MI

Built 1974 Load: 10.4 t ADT: 800

34 MILE RD

Poor

Over: HIGHBANK CREEK

1200 E OF ARMADA RIDGE, Macomb, MI

Built 1968 Load: 10.4 t ADT: 114

112TH AVENUE

Poor

Over: NO BR PENTWATER RIVER

0.3 MI S OF WASHINGTON RD, Oceana, MI

Built 1988 Load: 10.5 t ADT: 100

MCCONNEL ROAD

Poor

Over: EAST BRANCH PINE RIVER

0.9 MILES SOUTH OF M 72, Alcona, MI

Built 1935 Load: 10.7 t ADT: 159

MOWER ROAD

Poor

Over: COLE DRAIN

0.4 MI N OF CURTIS ROAD, Saginaw, MI

Built 1920 Load: 10.7 t ADT: 116

PARKER ROAD

Poor

Over: TRIB TO MILL CREEK

SCIO TWP SEC 30, Washtenaw, MI

Built 1968 Load: 10.7 t ADT: 300

CASSOPOLIS RD

Poor

Over: CHRISTIANA CREEK

580 FT N OF MT ZION ST, Cass, MI

Built 1960 Load: 10.7 t ADT: 159

10 MILE RD

Poor

Over: S BR PERE MARQUETTE RIV

3 MI E OF VOLNEY, Newaygo, MI

Built 1999 Load: 11.0 t ADT: 50

SAIKO ROAD

Poor

Over: HERNER DRAIN

MILLS TW SEC 3/10, Midland, MI

Built 1970 Load: 11.0 t ADT: 50

FOX ROAD

Poor

Over: SAUK RIVER

QUINCY TWP SEC 19, Branch, MI

Built 1984 Load: 11.3 t ADT: 220

J DRIVE NORTH

Poor

Over: N BR RICE CREEK

4 MI NW OF ALBION, Calhoun, MI

Built 1963 Load: 11.3 t ADT: 136

NORTH SHORE DRIVE

Poor

Over: CHRISTIANA CREEK

3 MI N OF ADAMSVILLE, Cass, MI

Built 1930 Load: 11.3 t ADT: 146

JACKSON ROAD

Poor

Over: UNNAMED CREEK

1.0 MILE SE OF SARANAC, Ionia, MI

Built 1993 Load: 11.3 t ADT: 321

HANOVER ROAD

Poor

Over: S BRANCH KALAMAZOO RIVER

2.5 M W & 1.0 M S PULASKI, Jackson, MI

Built 1938 Load: 11.3 t ADT: 150

WASHINGTON STREET

Poor

Over: CANAL(OFF AUGUSTA CREEK)

IN VILLAGE OF AUGUSTA, Kalamazoo, MI

Built 1921 Load: 11.3 t ADT: 174

INKSTER AVENUE

Poor

Over: BRONSON BOULEVARD

IN CITY OF KALAMAZOO, Kalamazoo, MI

Built 1990 Load: 11.3 t ADT: 650

WAR ROAD

Poor

Over: STONY CREEK

0.8 MI N OF NADEAU ROAD, Monroe, MI

Built 1982 Load: 11.3 t ADT: 1,550

CHESANING ROAD

Poor

Over: MISTEGUAY CREEK

0.8 MI E OF BUECHE ROAD, Saginaw, MI

Built 1974 Load: 11.3 t ADT: 603

MAIN ST OVERPASS

Poor

Over: AMTRAK RAILROAD

MATTAWAN MICHIGAN, Van Buren, MI

Built 1980 Load: 11.3 t ADT: 5,023

USFS RTE 3458

Poor

Over: CARP RIVER

3 MI N BURMA ROAD, Mackinac, MI

Built 1955 Load: 11.3 t ADT: 50

5LONG RAPIDS ROAD

Poor

Over: N BR THUNDER BAY RIVER

9 MI N W OF ALPENA, Alpena, MI

Built 1978 Load: 11.7 t ADT: 1,150

KINLEY ROAD

Poor

Over: PEET CREEK

0.1 MI E OF WRIGHT RD, Clinton, MI

Built 1983 Load: 11.7 t ADT: 300

CALKINS ROAD

Poor

Over: MISTEGUAY CREEK

BET DUFFIELD & NICHOLS RD, Genesee, MI

Built 1938 Load: 11.7 t ADT: 91

ROOSEVELT ROAD

Poor

Over: DRAIN #142

SEC 17-20 ELBA TWP, Gratiot, MI

Built 1920 Load: 11.7 t ADT: 70

6.25 ROAD

Poor

Over: LITTLE RIVER

5 MI. N OFMENOMINEE, Menominee, MI

Built 1928 Load: 11.7 t ADT: 39

ORR ROAD

Poor

Over: JO DRAIN

200 FT N OF LAPORTE ROAD, Midland, MI

Built 1978 Load: 11.7 t ADT: 207

TUCK RD

Poor

Over: UPPER ROUGE RIVER

0.21 MI N OF SALISBURY ST, Oakland, MI

Built 1925 Load: 11.7 t ADT: 2,370

DOUD ROAD (PARISH)

Poor

Over: N BR KAWKAWLIN RIVER

0.5 MI E OF NINE MILE, Bay, MI

Built 1972 Load: 12.0 t ADT: 316

CHAMBERS STREET

Poor

Over: THREAD CREEK

IN FLINT, Genesee, MI

Built 1970 Load: 12.0 t

TERRITORIAL ROAD

Poor

Over: W BR ST JOSEPH OF MAUMEE

0.05 MI W OF CARPENTER, Hillsdale, MI

Built 1928 Load: 12.0 t ADT: 743

E COUNTY LINE ROAD

Poor

Over: POTTER CREEK

0.1 M S NE COR SEC 36 T14, Isabella, MI

Built 1979 Load: 12.0 t ADT: 220

SIBLEY ROAD (EAST)

Poor

Over: LETTS CREEK

SYLVAN TWP SEC 2, Washtenaw, MI

Built 1968 Load: 12.0 t ADT: 200

FERRIS ROAD

Poor

Over: BASS LAKE DRAIN

SEC 17-18 SEVILLE TWP, Gratiot, MI

Built 1910 Load: 12.3 t ADT: 72

CARO ROAD

Poor

Over: KEMP DRAIN

SEC. 28-29 SEBEWAING TWP., Huron, MI

Built 1931 Load: 12.3 t ADT: 100

FRANK SMITH ROAD

Poor

Over: M BR PERE MARQUETTE RIV

IN CHASE, Lake, MI

Built 1929 Load: 12.3 t ADT: 112

WEST SPRING LAKE R

Poor

Over: SMITH BAYOU

AT 168TH AVENUE, Ottawa, MI

Built 1972 Load: 12.3 t ADT: 5,424

E N HINES DRIVE

Poor

Over: MIDDLE ROUGE RIVER

WESTLAND E/MERRIMAN, Wayne, MI

Built 1952 Load: 12.3 t ADT: 14,193

SHEPHERD RD

Poor

Over: SHARPS CREEK

50 FT N OF VERNON RD, Isabella, MI

Built 1969 Load: 12.3 t ADT: 85

DIAMOND PARK ROAD

Poor

Over: LITTLE BETSIE RIVER

0.6 MI W OF M137, Grand Traverse, MI

Built 1970 Load: 12.6 t ADT: 801

CHICAGO DRIVE

Poor

Over: BUCK CR

IN GRANDVILLE, Kent, MI

Built 1933 Load: 12.6 t ADT: 27,400

MARR ROAD

Poor

Over: S BR SHIAWASSEE RIVER

SEC 10 HOWELL TWP, Livingston, MI

Built 1937 Load: 12.6 t ADT: 348

LENAWEE CO LINE RD

Poor

Over: MILAN-MACON DRAIN

.3 MI N OF CONE ROAD, Monroe, MI

Built 1929 Load: 12.6 t ADT: 110

SCHOMAKER ROAD

Poor

Over: SWAN CREEK

0.6 MI E OF S THOMAS ROAD, Saginaw, MI

Built 1974 Load: 12.6 t ADT: 298

FERRY STREET

Poor

Over: THOROFARE CANAL

GROSSE ILE E/MERIDIAN, Wayne, MI

Built 1947 Load: 12.6 t ADT: 971

WILLOW BROOK ROAD

Poor

Over: SAUK RIVER

COLDWATER TWP SEC 26, Branch, MI

Built 1964 Load: 12.6 t ADT: 420

BRIGGS ROAD

Poor

Over: SOUTH BR HOG CREEK

QUINCY TWP SEC 11, Branch, MI

Built 1961 Load: 12.6 t ADT: 510

DEER HILL DRIVE

Poor

Over: DEER LAKE CREEK

0.2 MI SE I-75&DIXIE HWY, Oakland, MI

Built 1977 Load: 12.6 t ADT: 200

Showing 10,251-10,300 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.