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

29 MILE ROAD

Good

Over: DEVILS CREEK

8 MI. NE OF DAGGETT, Menominee, MI

Built 2021 Load: 55.1 t ADT: 100

OLD M-59

Good

Over: CLINTON RIVER

1.3 MI W OF AUBURN HTS, Oakland, MI

Built 1947 Load: 55.1 t ADT: 13,000

NORTHLAWN BLVD

Good

Over: ROUGE RIVER

0.3 MI W OF SOUTHFIELD RD, Oakland, MI

Built 1961 Load: 55.1 t ADT: 775

NINE MILE RD

Good

Over: RIVER ROUGE

W OF BEECH RD, Oakland, MI

Built 1930 Load: 55.1 t ADT: 7,976

US-31 NB

Good

Over: US-31 BR (MONROE RD)

4.0 MI N OF HART, Oceana, MI

Built 1977 Load: 55.1 t ADT: 4,413

ROOSEVELT ROAD

Good

Over: FLOWER CREEK

0.2 MI W OF 48TH AVENUE, Oceana, MI

Built 1994 Load: 55.1 t ADT: 150

190 TH AVE

Good

Over: HERSEY RIVER

SECTION 13/14 T17N R10W, Osceola, MI

Built 2012 Load: 55.1 t ADT: 81

96TH AVE

Good

Over: BLACK RIVER TRIBUTARY

0.70 MILES N OF OTTOGAN, Ottawa, MI

Built 2023 Load: 55.1 t ADT: 9,990

STEEL ROAD

Good

Over: SOUTH BRANCH BAD RIVER

0.8 MI N OF BALDWIN ROAD, Saginaw, MI

Built 2018 Load: 55.1 t ADT: 130

COUNTY ROAD P448

Good

Over: STUTTS CREEK

16.7 MI S OF M-28, Schoolcraft, MI

Built 2023 Load: 55.1 t ADT: 100

KINGSTON ROAD

Good

Over: CLARK DRAIN EXTENSION

SEC 16-17 KINGSTON TWP, Tuscola, MI

Built 1986 Load: 55.1 t ADT: 1,390

FELDKAMP ROAD

Good

Over: SALINE RIVER

SALINE TWP SEC 17, Washtenaw, MI

Built 2014 Load: 55.1 t ADT: 108

LYNDON AVE

Good

Over: M-39

IN DETROIT, Wayne, MI

Built 1961 Load: 55.1 t ADT: 1,800

IMPERIAL HTS ROAD

Good

Over: SPURR RIVER

0.4 MI SW OF US-41, Baraga, MI

Built 2016 Load: 55.1 t ADT: 294

DEMILLE ROAD

Good

Over: CN & GRAND TRUNK RR

1900 FT S GENESEE ST, Lapeer, MI

Built 1998 Load: 55.1 t ADT: 150

FLYNN ROAD

Good

Over: HOUGHTON CREEK

0.9 MI S OF ROSE CITY RD, Ogemaw, MI

Built 2015 Load: 55.1 t ADT: 154

STURGEON AVENUE

Good

Over: NEWELL DRAIN

LARKIN TWP SEC 29/30, Midland, MI

Built 2019 Load: 55.1 t ADT: 3,328

11 MILE RD

Good

Over: NOVI-LYON DRAIN

LYON TWP SEC 14/23, Oakland, MI

Built 2021 Load: 55.1 t ADT: 140

EASTERN AVENUE

Good

Over: PLASTER CREEK

GRAND RAPIDS, Kent, MI

Built 1991 Load: 55.3 t ADT: 16,890

TUTTLE HWY

Good

Over: BEAR CREEK DRAIN

0.1 MI NORTH OF HORTON RD, Lenawee, MI

Built 1995 Load: 55.3 t ADT: 175

133RD AVENUE

Good

Over: RABBIT RIVER

MANLIUS TWP SEC 10, Allegan, MI

Built 2013 Load: 55.4 t ADT: 500

LINDLEY ROAD

Good

Over: LITTLE SWAN CREEK DRAIN

MATTESON TWP SEC 29, Branch, MI

Built 2018 Load: 55.4 t ADT: 111

N DOWN RIVER RD

Good

Over: E BR AU SABLE RIVER

SEC 5 & 8 GRAYLING TWP, Crawford, MI

Built 2016 Load: 55.4 t ADT: 5,067

CROSS ROAD

Good

Over: N BRANCH KALAMAZOO RIVER

1.0 MI N 2.7 MI W HORTON, Jackson, MI

Built 2014 Load: 55.4 t ADT: 160

OBRIEN ROAD

Good

Over: SANDSTONE CREEK

2.7 MI WEST OF JACKSON, Jackson, MI

Built 2013 Load: 55.4 t ADT: 1,079

M-46

Good

Over: ROGUE RIVER

3.0 MI E OF KENT CITY, Kent, MI

Built 2000 Load: 55.4 t ADT: 5,475

FALLASBURG PARK DR

Good

Over: PAGE CREEK

0.6 MI S OF 3 MILE RD, Kent, MI

Built 1985 Load: 55.4 t ADT: 230

LAKESHORE DRIVE

Good

Over: CHANNEL TO LAKE ST CLAIR

0.2 MI SOUTH OF HURON PT, Macomb, MI

Built 2016 Load: 55.4 t ADT: 1,843

LAKESHORE DRIVE

Good

Over: CHANNEL TO LAKE ST CLAIR

0.1 MI NORTH OF RIVERDALE, Macomb, MI

Built 2016 Load: 55.4 t ADT: 2,490

31 MILE ROAD

Good

Over: STONY CREEK

0.5 MI EAST OF DEQUINDRE, Macomb, MI

Built 2016 Load: 55.4 t ADT: 500

I-275 SB

Good

Over: I-75

5 MI N OF MONROE, Monroe, MI

Built 1973 Load: 55.4 t ADT: 1,210

I-75 NB

Good

Over: SQUARE LAKE RD

IN TROY, Oakland, MI

Built 2017 Load: 55.4 t ADT: 52,934

10TH AVE

Good

Over: CHIPPEWA RIVER

SECTION 11 T17N R7W, Osceola, MI

Built 2007 Load: 55.4 t ADT: 25

FERGUS RD

Good

Over: SHIAWASSEE RIVER

0.2 MI E OF SHARON ROAD, Saginaw, MI

Built 2013 Load: 55.4 t ADT: 2,353

NEWBURG ROAD

Good

Over: SHIAWASSEE RIVER

2.2 MI N OF BANCROFT, Shiawassee, MI

Built 1999 Load: 55.4 t ADT: 1,140

SHIELD RD

Good

Over: MILL CREEK

SC10 TWP SEC 7, Washtenaw, MI

Built 2017 Load: 55.4 t ADT: 3,403

VAN HORN ROAD

Good

Over: SILVER CREEK

BROWNSTOWN E/INKSTER, Wayne, MI

Built 2018 Load: 55.4 t ADT: 8,920

WARREN ROAD

Good

Over: MIDDLE ROUGE RIVER

DBN HTS W/ANN ARBR TRAIL, Wayne, MI

Built 2023 Load: 55.4 t ADT: 14,908

FENTON RD

Good

Over: THREAD CREEK

IN CITY OF FLINT, Genesee, MI

Built 2023 Load: 55.4 t ADT: 4,783

NORTH POINT DRIVE

Good

Over: LAUGHING WHITEFISH RIVER

1.5 MI N OF DEERTON, Alger, MI

Built 2006 Load: 55.7 t ADT: 50

MAPLE AVE

Good

Over: THREAD RIVER

BET DORT & CENTER RD, Genesee, MI

Built 2011 Load: 55.7 t ADT: 8,600

I-196 WB RAMP

Good

Over: OTTAWA AVE & RAMP A

IN GRAND RAPIDS, Kent, MI

Built 1963 Load: 55.7 t ADT: 7,850

SUMMIT STREET

Good

Over: HALFWAY CREEK

0.4 MI N OF STATE LINE, Monroe, MI

Built 1991 Load: 55.7 t ADT: 1,912

32ND AVENUE

Good

Over: RIO GRANDE CREEK

0.35 MILES N OF COOLIDGE, Ottawa, MI

Built 2021 Load: 55.7 t ADT: 780

36TH AVE

Good

Over: N BRANCH CROCKERY CREEK

0.19 MILES N OF TRUMAN, Ottawa, MI

Built 2002 Load: 55.7 t ADT: 955

FRY ROAD

Good

Over: MISTEGUAY CREEK

2.0 MI E OF BISHOP ROAD, Saginaw, MI

Built 2022 Load: 55.7 t ADT: 527

FROST ROAD

Good

Over: SWAN CREEK

0.1 MI E OF LONE ROAD, Saginaw, MI

Built 2013 Load: 55.7 t ADT: 4,303

HIBBARD ROAD

Good

Over: ALDER CREEK

3 MILES SOUTH OVID, Shiawassee, MI

Built 2000 Load: 55.7 t ADT: 526

MARINE CITY HWY

Good

Over: UNNAMED CREEK

SEC 34 CASCO TWP, St. Clair, MI

Built 1946 Load: 55.7 t ADT: 11,741

AUSTIN ROAD

Good

Over: SALINE RIVER

SALINE TWP SEC 4, Washtenaw, MI

Built 2015 Load: 55.7 t ADT: 3,335

Showing 9,301-9,350 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.