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

SB MOUND RD

Good

Over: M-59

0.5 MI. WEST OF UTICA, Macomb, MI

Built 1994 Load: 32.1 t ADT: 11,100

WARNER AVE

Good

Over: BLACK CREEK

2.7 MI SE AETNA, Newaygo, MI

Built 1988 Load: 32.1 t ADT: 100

U-TURN E.OF GRNFLD

Good

Over: I-696

IN ROYAL OAK TOWNSHIP, Oakland, MI

Built 1987 Load: 32.1 t ADT: 4,000

M-5 NB MAINLINE

Good

Over: 12 MILE RD

I-96 I-696 M-5 INTRCHG, Oakland, MI

Built 1993 Load: 32.1 t ADT: 35,541

MACKINAW TR(210TH)

Good

Over: EAST BRANCH HERSEY CREEK

SECTION 9/10 T18N R10W, Osceola, MI

Built 2007 Load: 32.1 t ADT: 965

MARION ROAD

Good

Over: PICKEREL CREEK

0.2 MI E OF FRANDSCHE RD, Saginaw, MI

Built 1991 Load: 32.1 t ADT: 171

COUNTY LINE RD

Good

Over: JONES CREEK

3.5 MI S OF LENNON, Shiawassee, MI

Built 1989 Load: 32.1 t ADT: 424

WADHAMS ROAD

Good

Over: PINE RIVER

SEC. 15-16 ST. CLAIR TWP., St. Clair, MI

Built 2007 Load: 32.1 t ADT: 5,196

SHABBONA ROAD

Good

Over: WHITE CREEK I/C DRAIN

SEC 19-30 NOVESTA TWP, Tuscola, MI

Built 1972 Load: 32.1 t ADT: 335

US-24

Good

Over: SMITH CREEK

1.7 MI NE OF FLATROCK, Wayne, MI

Built 2011 Load: 32.1 t ADT: 27,700

M-3 TO I-375 S RMP

Good

Over: I-75

IN DETROIT, Wayne, MI

Built 1963 Load: 32.1 t ADT: 10,110

HAGGERTY ROAD

Good

Over: DESBROWDRAIN

SUMPTER N/OAKVILLE-WALTZ, Wayne, MI

Built 1988 Load: 32.1 t ADT: 178

NO 14 ROAD

Good

Over: MANTON CREEK

SECTION 33 T24N R9W, Wexford, MI

Built 2001 Load: 32.1 t ADT: 980

EAST PARIS AVENUE

Good

Over: LITTLE PLASTER CREEK

0.2 MI NORTH 0F 36TH ST, Kent, MI

Built 1997 Load: 32.1 t ADT: 15,333

FINKBEINER ROAD

Good

Over: THORNAPPLE RIVER

W OF WHITNEYVILLE RD, Barry, MI

Built 2010 Load: 32.1 t ADT: 3,896

OLD US-41

Good

Over: LATERAL CREEK

100 FT S OF US-41/M-28, Baraga, MI

Built 2022 Load: 32.1 t ADT: 10

DERENZY ROAD

Good

Over: CEDAR RIVER

0.25MI E & 0.12MI N M-88, Antrim, MI

Built 1988 Load: 32.4 t ADT: 3,150

HERMAN-NESTORIA RD

Good

Over: STURGEON RIVER

2 MI NW OF NESTORIA, Baraga, MI

Built 1987 Load: 32.4 t ADT: 21

I-94 WB

Good

Over: CSX RR SPUR (ABN)

0.2 MI N OF BRIDGEMAN, Berrien, MI

Built 1961 Load: 32.4 t ADT: 22,675

US-2 US-41

Good

Over: ESCANABA RIVER

3.6 MI N OF ESCANABA, Delta, MI

Built 2019 Load: 32.4 t ADT: 26,050

MATTHEWS ROAD

Good

Over: BIG CREEK

3 MI E OF OLIVET, Eaton, MI

Built 1985 Load: 32.4 t ADT: 45

LAHRING RD

Good

Over: US-23

1.6 MI N OF FENTON, Genesee, MI

Built 1957 Load: 32.4 t ADT: 2,669

WILSON ROAD

Good

Over: CORDRAY DRAIN

SEC. 25-36 WASHINGTON TWP, Gratiot, MI

Built 2011 Load: 32.4 t ADT: 333

COUNTY ROAD 161

Good

Over: EAST BR ONTONAGON RIVER

4.5 MI E 1.0 MI S KENTON, Houghton, MI

Built 1987 Load: 32.4 t ADT: 50

SUPERIOR RD P651

Good

Over: PILGRIM RIVER

2 MI S OF DODGEVILLE, Houghton, MI

Built 2020 Load: 32.4 t ADT: 2,410

COUNTY ROAD EM260

Good

Over: LAKE GERALD

.3 MI S .3 MI E TWIN LAKE, Houghton, MI

Built 1986 Load: 32.4 t ADT: 100

BACH ROAD

Good

Over: STATE DRAIN

SEC 26-35 SEBEWAING TWP, Huron, MI

Built 1999 Load: 32.4 t ADT: 115

CHIPPEWA ROAD

Good

Over: POTTER CREEK

SEC 35-36 CHIPPEWA TWP, Isabella, MI

Built 1994 Load: 32.4 t ADT: 137

SUMMERTON ROAD

Good

Over: JORDAN CREEK

SEC 30W DENVER TWP, Isabella, MI

Built 1994 Load: 32.4 t ADT: 113

SPRINKLE ROAD

Good

Over: I-94

6.2 MI E OF US-131, Kalamazoo, MI

Built 2015 Load: 32.4 t ADT: 27,500

KILGORE ROAD

Good

Over: PORTAGE CREEK

SEC 3-10 PORTAGE TWP, Kalamazoo, MI

Built 2013 Load: 32.4 t ADT: 16,205

ALGOMA AVE

Good

Over: CEDAR CREEK

400 FT NORTH OF 14 MI RD, Kent, MI

Built 1960 Load: 32.4 t ADT: 3,725

HANNA LAKE AVE

Good

Over: PLASTER CREEK

0.50 MI S OF 68TH ST, Kent, MI

Built 1967 Load: 32.4 t ADT: 3,738

LINCOLN LAKE AVE

Good

Over: NO NAME CREEK

0.90 MI N OF 12 MILE RD, Kent, MI

Built 1980 Load: 32.4 t ADT: 6,977

FLAT RIVER DRIVE

Good

Over: MILL RACE

0.25 MI N OF BURROUGHS ST, Kent, MI

Built 1989 Load: 32.4 t ADT: 2,667

RECTOR ST

Good

Over: STEGMAN CREEK

0.60 MI W OF SUMMIT AVE, Kent, MI

Built 1981 Load: 32.4 t ADT: 290

18 MILE ROAD

Good

Over: DUKE CREEK

0.20 MI E OF HANNA AVE, Kent, MI

Built 1982 Load: 32.4 t ADT: 376

12 MILE ROAD

Good

Over: NASH CREEK

0.30 MI W OF FRUIT RIDGE, Kent, MI

Built 1955 Load: 32.4 t ADT: 457

DEMINGS LAKE RD

Good

Over: S BRANCH RAISIN RIVER

0.1 MI E OF WHIG HWY, Lenawee, MI

Built 1991 Load: 32.4 t ADT: 236

M-53 NB

Good

Over: 24 MILE RD

4.0 MI N OF M-59, Macomb, MI

Built 1965 Load: 32.4 t ADT: 27,631

SHERWOOD AVE

Good

Over: I-696 &RAMPS B C H &F

CITY OF WARREN, Macomb, MI

Built 1975 Load: 32.4 t ADT: 12,000

EB METRO PARKWAY

Good

Over: CLINTON RIVER SPILLWAY

0.02 MI E OF UNION LAKE, Macomb, MI

Built 1964 Load: 32.4 t ADT: 14,905

ARMADA CENTER RD

Good

Over: EAST BRANCH COON CREEK

0.2 MI EAST OF NORTH AVE, Macomb, MI

Built 2002 Load: 32.4 t ADT: 1,260

ROMEO PLANK RD

Good

Over: GLOEDE DRAIN

0.5 MILES SOUTH OF M-59, Macomb, MI

Built 2009 Load: 32.4 t ADT: 20,070

24 MILE ROAD

Good

Over: FISH CREEK

0.3 MI WEST OF SASS ROAD, Macomb, MI

Built 1999 Load: 32.4 t ADT: 2,870

24 MILE ROAD

Good

Over: SALT RIVER

0.1 MI WEST OF BAKER ROAD, Macomb, MI

Built 1996 Load: 32.4 t ADT: 4,270

18.5 MILE RD

Good

Over: PLUM BROOK DRAIN

EAST OF RYAN RD, Macomb, MI

Built 2000 Load: 32.4 t ADT: 1,585

AAO ROAD

Good

Over: BIG DEAD RIVER

0.05 MI W OF AAT ROAD, Marquette, MI

Built 2003 Load: 32.4 t ADT: 80

SCOTTVILLE ROAD

Good

Over: PERE MARQUETTE RIVER

1.0 MI S OF SCOTTVILLE, Mason, MI

Built 2009 Load: 32.4 t ADT: 5,220

ROUTE 374

Good

Over: CROOKED CREEK

9 MI E OF CARNEY, Menominee, MI

Built 1981 Load: 32.4 t ADT: 288

Showing 6,701-6,750 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.