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

I-94 WB

Good

Over: BELLE RIVER

6.6 MI NE OF MACOMB COL, St. Clair, MI

Built 2009 Load: 44.7 t ADT: 25,000

PEMBROKE AVE

Good

Over: M-39

IN DETROIT, Wayne, MI

Built 1962 Load: 44.7 t ADT: 4,300

I-75

Good

Over: FORT ST

IN DETROIT, Wayne, MI

Built 1967 Load: 44.7 t ADT: 103,925

DAVISON S SERV RD

Good

Over: I-75 RAMP C

IN DETROIT OVER RAMP C, Wayne, MI

Built 1969 Load: 44.7 t ADT: 810

I-75

Good

Over: RAMP D TO DAVISON(M-8)

IN DETROIT OVER N-W RAMPT, Wayne, MI

Built 1969 Load: 44.7 t ADT: 152,325

HANNAN RD

Good

Over: I-275

IN ROMULUS, Wayne, MI

Built 1974 Load: 44.7 t ADT: 3,000

I-275 SB

Good

Over: TONQUISH CR

3.5 MI SE OF PLYMOUTH, Wayne, MI

Built 1972 Load: 44.7 t ADT: 63,759

MILLBROOK RD

Good

Over: PINE RIVER

500FT W OF COSTA BELLA AV, Mecosta, MI

Built 2013 Load: 44.7 t ADT: 241

WEIDMAN ROAD

Good

Over: LEWIS DRAIN

0.2 MI E OF MISSION ROAD, Isabella, MI

Built 2019 Load: 44.7 t ADT: 198

WEIDMAN ROAD

Good

Over: LEWIS DRAIN

0.1 MI E OF ISABELLA ROAD, Isabella, MI

Built 2014 Load: 44.7 t ADT: 196

RUTH LAKE ROAD

Good

Over: RUTH LAKE CREEK

0.5 MI NW OF THREE LAKES, Baraga, MI

Built 1993 Load: 44.8 t ADT: 69

VALLEY RD S641

Good

Over: TRAP ROCK RIVER

4 MI N OF LAKE LINDEN, Houghton, MI

Built 1992 Load: 44.8 t ADT: 281

BALDWIN ROAD

Good

Over: LAMB CREEK

0.9 MI E OF STEEL ROAD, Saginaw, MI

Built 2005 Load: 44.8 t ADT: 105

QUIMBY ROAD

Good

Over: WRIGHT LAKE CHANNEL

OVID TWP SEC 13, Branch, MI

Built 2009 Load: 44.9 t ADT: 618

MONETTE STREET

Good

Over: CHRISTIANA CREEK

3 MI E OF M-62, Cass, MI

Built 1993 Load: 44.9 t ADT: 3,400

WHITE PINE HWY

Good

Over: LIME CREEK

0.4 MI N OF RIDGEVILLE RD, Lenawee, MI

Built 2003 Load: 44.9 t ADT: 43

M-32

Good

Over: S BR THUNDER BAY RIVER

4.7 MI E MONTMORENCY COL, Alpena, MI

Built 1932 Load: 45.0 t ADT: 4,144

M-65

Good

Over: BIG CREEK

2.0 MI S OF TWINING, Arenac, MI

Built 2021 Load: 45.0 t ADT: 4,353

US-23

Good

Over: LITTLE BLACK RIVER

IN CHEBOYGAN MACKINAW ST, Cheboygan, MI

Built 2016 Load: 45.0 t ADT: 3,731

MILL ROAD

Good

Over: FLINT RIVER

BET. BEECHER AND FLUSHING, Genesee, MI

Built 1985 Load: 45.0 t ADT: 6,148

M-20

Good

Over: CHIPPEWA RIVER

IN MT PLEASANT, Isabella, MI

Built 1996 Load: 45.0 t ADT: 10,842

E IMLAY CITY RD

Good

Over: S BR FLINT R

IN LAPEER (OLD M-21), Lapeer, MI

Built 1997 Load: 45.0 t ADT: 14,458

WHEELING ROAD

Good

Over: NORTH BR. MILL CREEK DN.

SEC. 11-12 GOODLAND TWP., Lapeer, MI

Built 2004 Load: 45.0 t ADT: 39

CENTER ROAD

Good

Over: CRANBERRY CREEK

SEC 15-22 DEERFIELD TWP, Livingston, MI

Built 2014 Load: 45.0 t ADT: 680

HD RD(FORESTVILLE)

Good

Over: DEAD RIVER

2 MI N OF JCT US41 CO492, Marquette, MI

Built 2012 Load: 45.0 t ADT: 378

DARR ROAD

Good

Over: N BR LINCOLN RIVER

4 MI W OF FOUNTAIN, Mason, MI

Built 2018 Load: 45.0 t ADT: 10

I-75 SB

Good

Over: GTW RR

5.7 MI NW OF M-59, Oakland, MI

Built 1962 Load: 45.0 t ADT: 36,813

WILDERNESS DRIVE

Good

Over: FIRESTEEL RIVER

10 MI E OF ONTONOGON, Ontonagon, MI

Built 2009 Load: 45.0 t ADT: 50

KANGAS ROAD

Good

Over: W BR FIRESTEEL RIVER

5 MI N OF GREENLAND, Ontonagon, MI

Built 2009 Load: 45.0 t ADT: 50

6 MILE RD

Good

Over: THORN CREEK

SECTION 6 T17N R7W, Osceola, MI

Built 1995 Load: 45.0 t ADT: 62

WOODBURY ROAD

Good

Over: LOOKINGGLASS RIVER

2 MILES S OF LAINGSBURG, Shiawassee, MI

Built 1997 Load: 45.0 t ADT: 3,231

BINGHAM RD

Good

Over: NORTH STATE DRAIN

0.15 MI N OF HENDERSON, Shiawassee, MI

Built 2006 Load: 45.0 t ADT: 216

DIVISION ROAD

Good

Over: BELLE RIVER

SEC.35 COLUMBUS TWP., St. Clair, MI

Built 2007 Load: 45.0 t ADT: 4,569

KILBURN ROAD

Good

Over: PLUM CREEK

SEC. 30 GRANT TWP, St. Clair, MI

Built 2011 Load: 45.0 t ADT: 60

LOOMIS ROAD

Good

Over: ALLEN DRAIN

SEC 29-32 AKRON TWP, Tuscola, MI

Built 1999 Load: 45.0 t ADT: 115

JOY RD

Good

Over: M-39

IN DETROIT, Wayne, MI

Built 1962 Load: 45.0 t ADT: 19,000

HOSSLER ROAD

Good

Over: THUNDER BAY RIVER

SECTION 20 BRILEY TWP, Montmorency, MI

Built 1962 Load: 45.0 t ADT: 120

BEACH STREET

Good

Over: LAKE ST CLAIR CANAL

0.1 MI E OF JEFFERSON, Macomb, MI

Built 2006 Load: 45.0 t ADT: 998

M-6 WB C-D

Good

Over: NORFOLK SOUTHERN RR

BYRON TWP SEC 1, Kent, MI

Built 2000 Load: 45.0 t ADT: 15,300

COTTONWOOD DRIVE

Good

Over: RUSH CREEK

GEORGETOWN TWP SEC 13, Ottawa, MI

Built 1997 Load: 45.0 t ADT: 9,133

DICKERSON ROAD

Good

Over: HOPKINS CREEK

SEC 34/35 T24N R8W, Missaukee, MI

Built 2000 Load: 45.0 t ADT: 110

EAST VIEW DRIVE

Good

Over: GLODE DRAIN

0.1 M W OF GARFIELD RD, Macomb, MI

Built 2001 Load: 45.0 t ADT: 350

I-75 SB

Good

Over: SANDY CREEK

1.2 MI NE OF M-50, Monroe, MI

Built 2016 Load: 45.0 t ADT: 25,200

FDR3350

Good

Over: BUSH CREEK

19 MI E 9 MI N WATERSMEET, Iron, MI

Built 2021 Load: 45.0 t ADT: 100

FDR 3610

Good

Over: JUMBO RIVER

7 MI S OF KENTON, Iron, MI

Built 2021 Load: 45.0 t ADT: 20

BRANT ROAD

Good

Over: SOUTH BRANCH BAD RIVER

1.0 MI E OF HEMLOCK ROAD, Saginaw, MI

Built 2008 Load: 45.2 t ADT: 1,019

MOORE ROAD

Good

Over: PINNEBOG RIVER

SEC. 23-24 OLIVER TWP., Huron, MI

Built 1985 Load: 45.3 t ADT: 75

HACK RD

Good

Over: N MACON CREEK

0.2 MI W OF CO. LINE HWY, Lenawee, MI

Built 2005 Load: 45.3 t ADT: 98

I-75 SB

Good

Over: PINCONNING RIVER

4.0 MI SW OF PINCONNING, Bay, MI

Built 2011 Load: 45.4 t ADT: 15,522

I-75 NB

Good

Over: PINCONNING RIVER

4.0 MI SW OF PINCONNING, Bay, MI

Built 2011 Load: 45.4 t ADT: 15,522

Showing 8,451-8,500 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.