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

CENTERLINE ROAD

Good

Over: MURDICK-VANSICKLAND DRN

SEC 15-22 KOYLTON TWP, Tuscola, MI

Built 1993 Load: 35.5 t ADT: 90

I-75 SB

Good

Over: WHITE FEATHER ROAD

3.0 MI N OF PINCONNING, Bay, MI

Built 1968 Load: 35.6 t ADT: 13,735

FIVE POINT HWY

Good

Over: BATTLE CREEK RIVER

5 MI SE OF CHARLOTTE, Eaton, MI

Built 1959 Load: 35.6 t ADT: 481

SECORD DAM ROAD

Good

Over: TITTABAWASSEE RIVER

0.75 MI E OF M-30, Gladwin, MI

Built 1989 Load: 35.6 t ADT: 340

COUNTY ROAD P106B

Good

Over: OTTER RIVER

1MI W 2.25 MI N TAPIOLA, Houghton, MI

Built 1985 Load: 35.6 t ADT: 50

STODDARD ROAD

Good

Over: BIRD CREEK DRAIN

SEC 8-17 DWIGHT TWP, Huron, MI

Built 2015 Load: 35.6 t ADT: 285

M-143 E MICH AVE

Good

Over: MUSEUM DRIVE

0.3 MI E OF THE CAPITOL, Ingham, MI

Built 1987 Load: 35.6 t ADT: 8,882

HULL ROAD

Good

Over: SYCAMORE CREEK

2.2 MI S OF MASON, Ingham, MI

Built 2015 Load: 35.6 t ADT: 3,835

M-21

Good

Over: TOLES CREEK

2.6 MI E OF KENT CO LINE, Ionia, MI

Built 1929 Load: 35.6 t ADT: 5,100

SWAN RD (DAVISON)

Good

Over: SILVER CREEK

1625 FT E OF BROOKS ROAD, Iosco, MI

Built 2001 Load: 35.6 t ADT: 180

CABLE LAKE RD

Good

Over: W BRANCH NET RIVER

1.7 MI WEST USH 141, Iron, MI

Built 1994 Load: 35.6 t ADT: 50

M-21

Good

Over: FLAT RIVER

IN LOWELL (107 E MAIN ST), Kent, MI

Built 1940 Load: 35.6 t ADT: 18,836

SUMMIT COURT

Good

Over: STEGMAN CREEK

0.1 MI WEST OF SUMMIT AVE, Kent, MI

Built 1976 Load: 35.6 t ADT: 106

M-53

Good

Over: PETERS DRAIN

0.2 MI S OF SANILAC COL, Lapeer, MI

Built 2007 Load: 35.6 t ADT: 7,595

I-69 WB RAMP

Good

Over: PINE CREEK

0.2 MI E OF WILDER RD, Lapeer, MI

Built 1983 Load: 35.6 t ADT: 7,500

WARWICK ROAD

Good

Over: BEAN CREEK

0.5 MI SOUTH OF MEDINA RD, Lenawee, MI

Built 1980 Load: 35.6 t ADT: 236

RUTLEDGE ROAD

Good

Over: MUNUSCONG RIVER

1.5 M S 2 M W OF PICKFORD, Mackinac, MI

Built 2006 Load: 35.6 t ADT: 60

18 MILE RD

Good

Over: GIBSON DRAIN

0.3 MI EAST OF DEQUINDRE, Macomb, MI

Built 1985 Load: 35.6 t ADT: 18,030

26 MILE ROAD

Good

Over: HEALY BROOK DRAIN

0.5MILE W OF ROMEO PLANK, Macomb, MI

Built 1993 Load: 35.6 t ADT: 13,260

BORDMAN ROAD

Good

Over: EAST BRANCH COON CREEK

0.4 MI WEST OF NORTH AVE, Macomb, MI

Built 2014 Load: 35.6 t ADT: 390

EAA ROAD

Good

Over: BIG BROOK

2.5 MI NW OF 438 HWY, Marquette, MI

Built 2007 Load: 35.6 t ADT: 20

ELLIS ROAD

Good

Over: CROCKERY CREEK

11.2 MI E OF I-96, Muskegon, MI

Built 1953 Load: 35.6 t ADT: 1,987

WIXOM RD

Good

Over: I-96

IN WIXOM, Oakland, MI

Built 2008 Load: 35.6 t ADT: 14,770

THIRTEEN MILE

Good

Over: ROUGE RIVER

BET TELEGRAPH AND LAHSER, Oakland, MI

Built 2013 Load: 35.6 t ADT: 13,420

JOHNSTONE RD

Good

Over: SHIAWASSEE RIVER

3.25 MI NE OF HENDERSON, Shiawassee, MI

Built 1986 Load: 35.6 t ADT: 798

GRATIOT ROAD

Good

Over: UNNAMED CREEK

SEC. 24 COLUMBUS TWP., St. Clair, MI

Built 2021 Load: 35.6 t ADT: 4,250

GRATIOT ROAD

Good

Over: UNNAMED CREEK

SEC. 18 ST. CLAIR TWP., St. Clair, MI

Built 2021 Load: 35.6 t ADT: 4,263

GRATIOT ROAD

Good

Over: RATTLE RUN CREEK

SEC 18 ST CLAIR TWP, St. Clair, MI

Built 2017 Load: 35.6 t ADT: 4,250

MAIN STREET

Good

Over: SMITHS CREEK

SEC. 31 KIMBALL TWP., St. Clair, MI

Built 2019 Load: 35.6 t ADT: 1,145

HESSEN ROAD

Good

Over: MELDRUM DRAIN

SEC. 34-35 CASCO TWP., St. Clair, MI

Built 2014 Load: 35.6 t ADT: 110

PIKE ROAD

Good

Over: CENTER LINE DRAIN

SEC 20 GILFORD TWP, Tuscola, MI

Built 2020 Load: 35.6 t ADT: 24

US-24 NB

Good

Over: SEXTON KILFOIL DRAIN

IN TAYLOR, Wayne, MI

Built 1986 Load: 35.6 t ADT: 29,303

I-75 NB

Good

Over: EUREKA RD

IN TAYLOR OVER EUREKA RD, Wayne, MI

Built 1966 Load: 35.6 t ADT: 46,853

EB FULLERTON AVE

Good

Over: M-39

IN DETROIT, Wayne, MI

Built 1964 Load: 35.6 t ADT: 1,500

FENKELL AVE

Good

Over: M-39

IN DETROIT, Wayne, MI

Built 1962 Load: 35.6 t ADT: 25,000

GREEN AVE

Good

Over: I-75

IN DETROIT, Wayne, MI

Built 2023 Load: 35.6 t ADT: 5,600

NO 50 ROAD

Good

Over: PINE RIVER

SECTION 27 T21N R12W, Wexford, MI

Built 1995 Load: 35.6 t ADT: 310

MCMURPHY ROAD

Good

Over: THUNDER BAY RIVER

SECTIONS 20-21 AVERY TWP, Montmorency, MI

Built 2003 Load: 35.6 t ADT: 60

RAINY LAKE ROAD

Good

Over: RAINY RIVER

CASE TWP SEC 8 & 9, Presque Isle, MI

Built 2003 Load: 35.6 t ADT: 500

BEAUFORT LAKE RD

Good

Over: SPURR RIVER

AT BEAUFORT LAKE, Baraga, MI

Built 2015 Load: 35.6 t ADT: 53

MAPLE ST

Good

Over: AU SABLE RIVER

0.3 MI N OF M-72, Crawford, MI

Built 1975 Load: 35.6 t ADT: 2,000

STATION ROAD

Good

Over: DICKERSON CREEK

STATION 0.02 W DERBY RD, Montcalm, MI

Built 1985 Load: 35.7 t ADT: 107

REMICK ROAD

Good

Over: PINE RIVER

SEC 36C ROLLAND TWP, Isabella, MI

Built 1985 Load: 35.8 t ADT: 120

CANADA ROAD

Good

Over: SILVER CREEK

0.3 MI W OF MOORISH, Saginaw, MI

Built 1997 Load: 35.8 t ADT: 234

VISTULA ROAD

Good

Over: PIGEON RIVER

1.8 MI SW OF MOTTVILLE, St. Joseph, MI

Built 1985 Load: 35.8 t ADT: 569

PORTAGE ROAD

Good

Over: GOURD NECK CREEK

0.4MI S/PORTAGE CITYLIMIT, Kalamazoo, MI

Built 2006 Load: 35.9 t ADT: 11,685

I-94 WB

Good

Over: 9 MILE ROAD

3.2 MI E OF M-66, Calhoun, MI

Built 2023 Load: 36.0 t ADT: 22,400

ST CLAIR ROAD

Good

Over: MAPLE RIVER

0.1 MI N OF MAPLE RIV RD, Clinton, MI

Built 2014 Load: 36.0 t ADT: 117

HERBISON ROAD

Good

Over: LOOKING GLASS RIVER

BETWEEN THE FOREST HILLS, Clinton, MI

Built 2011 Load: 36.0 t ADT: 449

COUNTY ROAD G 3

Good

Over: RAPID RIVER

8 M N 2 M W RAPID RIVER, Delta, MI

Built 1986 Load: 36.0 t ADT: 58

Showing 7,301-7,350 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.