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

MACKINAW ROAD

Good

Over: JOHNSON DRAIN

1000 FT S OF TOWNLINE RD, Bay, MI

Built 2021 Load: 60.3 t ADT: 409

ARBOGAST ROAD

Good

Over: ST JOSEPH RIVER

UNION TWP SEC 5-6, Branch, MI

Built 2016 Load: 60.3 t ADT: 1,180

RIVER ROAD

Good

Over: BOARDMAN RIVER

4.3M N & 0.5M W OF KINGSL, Grand Traverse, MI

Built 1962 Load: 60.3 t ADT: 2,586

BALDWIN ROAD

Good

Over: BAD RIVER

SEC 3-4 NORTH STAR TWP, Gratiot, MI

Built 2010 Load: 60.3 t ADT: 529

N GRAND RIVER

Good

Over: GRAND RIVER

IN THE CITY OF LANSING, Ingham, MI

Built 1924 Load: 60.3 t ADT: 3,815

CHAPMAN RD

Good

Over: DEER CREEK

0.3 MI EAST OF NORTH AVE, Macomb, MI

Built 2016 Load: 60.3 t ADT: 230

MASTERS ROAD

Good

Over: TAMARACK CREEK

0.75 MI S OF M-46, Montcalm, MI

Built 2023 Load: 60.3 t ADT: 187

3750TH STREET

Good

Over: BRANDYWINE CREEK

0.2 MI SOUTH OF 36TH AVE, Van Buren, MI

Built 1997 Load: 60.3 t ADT: 127

UNDERWOOD AVE

Good

Over: I-96

IN DETROIT, Wayne, MI

Built 1972 Load: 60.3 t ADT: 1,700

W GRAND BLVD SB

Good

Over: I-75

IN DETROIT, Wayne, MI

Built 2003 Load: 60.3 t ADT: 4,235

PICKEREL LAKE ROAD

Good

Over: MINNEHAHA CREEK

SPRINGVALE TWP SEC 5, Emmet, MI

Built 2018 Load: 60.3 t ADT: 1,660

LAWRENCE ROAD

Good

Over: HIGH BANKS CREEK

BALTIMORE TWP SEC 12/13, Barry, MI

Built 2013 Load: 60.3 t ADT: 1,400

OLD M-20 (ECHO DR)

Good

Over: ROBINSON CREEK

AT BINGHAM AVE & ECHO RD, Newaygo, MI

Built 2023 Load: 60.3 t ADT: 2,377

FILLMORE ROAD

Good

Over: BAD RIVER

SEC 4-9 HAMILTON TWP, Gratiot, MI

Built 1994 Load: 60.4 t ADT: 111

HILLIS ROAD

Good

Over: PINE RIVER

1.0 MI E OF DOUGLASS ROAD, Montcalm, MI

Built 1995 Load: 60.5 t ADT: 97

HOGAN ROAD

Good

Over: SHIAWASSEE RIVER

BET SILVER LAKE & ROLSTON, Genesee, MI

Built 2023 Load: 60.6 t ADT: 610

CARO ROAD

Good

Over: STATE I/C DRAIN

SEC 16-17 SEBEWAING TWP, Huron, MI

Built 2014 Load: 60.6 t ADT: 185

CLEVELAND STREET

Good

Over: GRAND RIVER

1.2MI E M66 @ S LMT IONIA, Ionia, MI

Built 2013 Load: 60.6 t ADT: 4,512

29 MILE ROAD

Good

Over: DEER CREEK

0.2 MI EAST OF BATES ROAD, Macomb, MI

Built 2003 Load: 60.6 t ADT: 300

BAA ROAD

Good

Over: CHOCOLAY RIVER

IN HARVEY VILLAGE, Marquette, MI

Built 2020 Load: 60.6 t ADT: 500

FORDNEY ROAD

Good

Over: WHITMORE DRAIN

0.9 MI N OF DICE ROAD, Saginaw, MI

Built 2008 Load: 60.6 t ADT: 2,075

FLOATING BRIDGE RD

Good

Over: ROCKY RIVER

SW OF MOOREPARK, St. Joseph, MI

Built 2014 Load: 60.6 t ADT: 143

5950 STREET

Good

Over: PAW PAW RIVER

1.0 MI N OF RED ARROW HWY, Van Buren, MI

Built 1974 Load: 60.6 t ADT: 708

I-96

Good

Over: I-94

IN DETROIT, Wayne, MI

Built 1971 Load: 60.6 t ADT: 116,948

WEST PARK DRIVE

Good

Over: CSX RR

CITY OF NOVI, Oakland, MI

Built 1999 Load: 60.6 t ADT: 11,500

21 MILE ROAD

Good

Over: LEWIS DRAIN

0.5 MI EAST OF HAYES ROAD, Macomb, MI

Built 1975 Load: 60.7 t ADT: 20,610

VERONA ROAD

Good

Over: NEW RIVER

SEC 31 HURON TWP, Huron, MI

Built 1926 Load: 60.8 t ADT: 610

S MERIDIAN ROAD

Good

Over: GRAND RIVER

0.4 MI. SOUTH OF JACKSON, Jackson, MI

Built 1994 Load: 60.8 t ADT: 889

TRINKLE ROAD

Good

Over: MILL CREEK

LIMA TWP SEC 9 & 16, Washtenaw, MI

Built 1997 Load: 60.8 t ADT: 233

FISHING LOOP

Good

Over: J TO H SPILLWAY

SEC 18 T45N R13W, Schoolcraft, MI

Built 1943 Load: 60.8 t ADT: 50

GARFIELD ROAD

Good

Over: S BR PINCONNING RIVER

400 FT S OF NEUMAN RD, Bay, MI

Built 2021 Load: 60.9 t ADT: 1,343

RAYMOND ROAD

Good

Over: KALAMAZOO RIVER

EMMETT TWP SEC 8, Calhoun, MI

Built 2017 Load: 60.9 t ADT: 1,086

MARSHALL AVENUE

Good

Over: KALAMAZOO RIVER

MARSHALL MICHIGAN, Calhoun, MI

Built 2018 Load: 60.9 t ADT: 3,489

NORTH STATE STREET

Good

Over: PINE RIVER

0.15MSUS27AINALMA, Gratiot, MI

Built 1938 Load: 60.9 t ADT: 5,225

28 MILE ROAD

Good

Over: CAMP BROOK DRAIN

1.2 MI E OF ROMEO PLANK, Macomb, MI

Built 1995 Load: 60.9 t ADT: 110

BEECH RD

Good

Over: ROUGE RIVER

IN SOUTHFIELD, Oakland, MI

Built 2012 Load: 60.9 t ADT: 6,637

FOX ROAD

Good

Over: UNNAMED CREEK

SEC 19-20 WALES TWP, St. Clair, MI

Built 2019 Load: 60.9 t ADT: 45

M-102 EB SERV RD

Good

Over: M-10

N LTS OF DETROIT, Wayne, MI

Built 1965 Load: 60.9 t ADT: 14,430

E OLD STATE STREET

Good

Over: JORDAN RIVER

0.5 MI E OF M-66, Antrim, MI

Built 2017 Load: 60.9 t ADT: 525

M-49

Good

Over: LITTLE HOG CREEK

200 FT S OF ARKANSAW RD, Hillsdale, MI

Built 2023 Load: 60.9 t ADT: 2,975

WINANS ROAD

Good

Over: W BR PINE RIVER

SEC 31-32 PINE RIVER TWP, Gratiot, MI

Built 2003 Load: 61.0 t ADT: 177

MERIDIAN ROAD

Good

Over: SOUTH BR CHIPPEWA RIVER

SEC 30W UNION TWP, Isabella, MI

Built 2003 Load: 61.0 t ADT: 1,277

M-66

Good

Over: QUAKER BROOK

IN VILLAGE OF NASHVILLE, Barry, MI

Built 2019 Load: 61.2 t ADT: 6,083

CRAPO ROAD

Good

Over: BAD RIVER

SEC 14-15 NORTH STAR TWP, Gratiot, MI

Built 2013 Load: 61.2 t ADT: 92

DIVISION AVENUE

Good

Over: PLASTER CREEK

GRAND RAPIDS, Kent, MI

Built 2007 Load: 61.2 t ADT: 17,251

BRIDGE STREET

Good

Over: GRAND RIVER

475 FT WEST OF MONROE AVE, Kent, MI

Built 1988 Load: 61.2 t ADT: 15,226

TIENKEN ROAD

Good

Over: PAINT CREEK

BET LIVERNOIS AND ROCHEST, Oakland, MI

Built 2006 Load: 61.2 t ADT: 23,921

M-66

Good

Over: WEST BRANCH R (COYLE CR)

0.1 MI N OF M-115, Osceola, MI

Built 1940 Load: 61.2 t ADT: 1,864

M-46

Good

Over: PLANK ROAD #16 DRAIN

1.5 MI EAST OF MERRILL, Saginaw, MI

Built 2018 Load: 61.2 t ADT: 6,100

ECORSE ROAD

Good

Over: NS RR

TAYLOR E/TELEGRAPH, Wayne, MI

Built 1936 Load: 61.2 t ADT: 24,093

Showing 9,551-9,600 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.