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

COUNTY RD 100

Good

Over: CUT RIVER

SECTION 28 T23N R3W, Roscommon, MI

Built 2020 Load: 54.4 t ADT: 3,274

CHAPIN ROAD

Good

Over: WEEKS DRAIN

0.9 MI N OF OHARA ROAD, Saginaw, MI

Built 2019 Load: 54.4 t ADT: 145

ORR ROAD

Good

Over: MARSH CREEK

0.4 MI N OF SPENCER ROAD, Saginaw, MI

Built 2019 Load: 54.4 t ADT: 147

FLAMINGO DRIVE

Good

Over: UNNAMED CANAL

SEC 36 CLAY TWP, St. Clair, MI

Built 2021 Load: 54.4 t ADT: 569

NEUMAN ROAD

Good

Over: PINE RIVER

SEC. 22 ST. CLAIR TWP., St. Clair, MI

Built 1978 Load: 54.4 t ADT: 255

M-85 NB

Good

Over: MARSH CREEK

0.5 MI SW OF TRENTON, Wayne, MI

Built 2016 Load: 54.4 t ADT: 15,575

NO 30 ROAD

Good

Over: SLAGLE CREEK

SLAGLE TWP SEC 12-13, Wexford, MI

Built 2010 Load: 54.4 t ADT: 735

MIDDLE ROAD

Good

Over: GREENBRIAR (PVT DRIVE)

W TRAVERSE TWP SEC 3 34, Emmet, MI

Built 2018 Load: 54.4 t ADT: 1,044

W KAREN LAKE RD

Good

Over: E BR AUSABLE RIVER

0.1 MI E OF BOBCAT TRAIL, Crawford, MI

Built 2016 Load: 54.4 t ADT: 50

9 MILE ROAD

Good

Over: S BR CARROLL CREEK

LEE TWP SEC 3/4, Midland, MI

Built 2017 Load: 54.4 t ADT: 500

DIAMANTE DRIVE

Good

Over: GLOEDE DRAIN

0.2 MI E OF GAVIOTA LANE, Macomb, MI

Built 2016 Load: 54.4 t ADT: 100

POSEYVILLE ROAD

Good

Over: JO DRAIN

INGERSOLL TWP SEC 8/9, Midland, MI

Built 2017 Load: 54.4 t ADT: 2,196

SHAFFER RD (EAST)

Good

Over: BLUFF CREEK

WARREN TWP SEC 23/26, Midland, MI

Built 2017 Load: 54.4 t ADT: 1,034

ARNOLD HWY

Good

Over: NILE DRAIN

0.1 MI E OF M-52, Lenawee, MI

Built 2002 Load: 54.5 t ADT: 65

LINCOLN DRIVE

Good

Over: ROUGE RIVER

0.2 MI W OF SOUTHFIELD RD, Oakland, MI

Built 2007 Load: 54.5 t ADT: 6,754

LAKESIDE ST NORTH

Good

Over: QUARTON LK BR-ROUGE RIVR

0.2 MI S OF QUARTON RD, Oakland, MI

Built 1994 Load: 54.5 t ADT: 650

LAKESIDE ST SOUTH

Good

Over: QUARTON LK-ROUGE RIVER

0.4 MI S OF QUARTON RD, Oakland, MI

Built 1994 Load: 54.5 t ADT: 650

TWO MILE RD FH54

Good

Over: SUCKER CREEK

3.5 MI W OF HWY 45, Ontonagon, MI

Built 1986 Load: 54.5 t ADT: 150

N OLD WOODWARD

Good

Over: ROUGE RIVER

0.3 NW OF MAPLE, Oakland, MI

Built 2006 Load: 54.5 t ADT: 12,484

US-12

Good

Over: DEER CREEK

1.4 MI W OF THREE OAKS, Berrien, MI

Built 2017 Load: 54.8 t ADT: 5,975

21 MILE ROAD

Good

Over: RICE CREEK

4 MI E OF MARSHALL, Calhoun, MI

Built 2019 Load: 54.8 t ADT: 121

WEBB ROAD

Good

Over: LITTLE PIGEON RIVER

SEC.1 T33N R2W, Cheboygan, MI

Built 2006 Load: 54.8 t ADT: 280

ST JOE HWY

Good

Over: SEBEWA CREEK

2 MI S OF SUNFIELD, Eaton, MI

Built 2016 Load: 54.8 t ADT: 502

GREEN ROAD

Good

Over: KEARSLEY CREEK

1300 FT EAST OF STATE RD, Genesee, MI

Built 2009 Load: 54.8 t ADT: 674

COLEMAN ROAD

Good

Over: MCDONALD DRAIN

100 FT E NW SEC 29 T16N R, Isabella, MI

Built 2013 Load: 54.8 t ADT: 693

BERRY RD

Good

Over: GRAND RIVER

3 MI E OF RIVES JUNCTION, Jackson, MI

Built 2011 Load: 54.8 t ADT: 2,500

PARSON ROAD

Good

Over: N BR OF KALAMAZOO RIVER

1.4 MI EAST OF CONCORD, Jackson, MI

Built 2006 Load: 54.8 t ADT: 726

W AVENUE

Good

Over: PORTAGE RIVER

2 MI EAST OF VICKSBURG, Kalamazoo, MI

Built 1993 Load: 54.8 t ADT: 4,271

JEWELL ROAD

Good

Over: YATES DRAIN

0.2 MI SOUTH OF 27 MILE, Macomb, MI

Built 1970 Load: 54.8 t ADT: 5,812

CH ROAD

Good

Over: MIDDLE BR OF ESCANABA RI

2.8 MI W OF 581 HIGHWAY, Marquette, MI

Built 2013 Load: 54.8 t ADT: 93

DIVERSION ST

Good

Over: CLINTON RIVER

WEST & BELOW ROCHESTER RD, Oakland, MI

Built 1985 Load: 54.8 t ADT: 2,640

NINE MILE RD

Good

Over: EVANS BRANCH OF ROUGE RI

IN SOUTHFIELD, Oakland, MI

Built 2019 Load: 54.8 t ADT: 13,604

FOX ROAD

Good

Over: I-69

3.5 MI SE OF EMMETT, St. Clair, MI

Built 1981 Load: 54.8 t ADT: 150

CAPAC ROAD

Good

Over: N. BR. MILL CREEK DRAIN

SEC. 15-16 LYNN TWP., St. Clair, MI

Built 2006 Load: 54.8 t ADT: 2,050

MILLINGTON ROAD

Good

Over: DEAD CREEK

SEC 7-18 ARBELA TWP, Tuscola, MI

Built 2017 Load: 54.8 t ADT: 342

LOOMIS ROAD

Good

Over: TUTTLEVILLE DRAIN

SEC 26-35 AKRON TWP, Tuscola, MI

Built 1980 Load: 54.8 t ADT: 133

CAINE ROAD

Good

Over: GOODING CREEK

SEC 21-22 VASSAR TWP, Tuscola, MI

Built 2017 Load: 54.8 t ADT: 905

I-75 NB

Good

Over: GTW RR

IN WOODHAVEN, Wayne, MI

Built 2006 Load: 54.8 t ADT: 36,248

I-275 RAMP

Good

Over: MCCLAUGHERY DRAIN

1 MI SW OF WAYNE, Wayne, MI

Built 1974 Load: 54.8 t ADT: 4,160

TOLEDO ROAD

Good

Over: ALLEN ROAD

BRWNTWNS/PENNSYLVANIA, Wayne, MI

Built 1959 Load: 54.8 t ADT: 19,876

PUTNUAM DRIVE

Good

Over: WALNUT LAKE CANAL

0.2 MI N OF WALNUT LK RD, Oakland, MI

Built 2017 Load: 54.8 t ADT: 50

NO DATA ENTERED

Good

Over: PINE RIVER

NO DATA ENTERED, Alcona, MI

Built 2011 Load: 54.8 t ADT: 100

COUNTY RD 565

Good

Over: ESCANABA RIVER OVERFLOW

7 MILES SOUTH OF PALMER, Marquette, MI

Built 2000 Load: 54.9 t ADT: 176

M-6 WB RAMP C

Good

Over: I-196 EB

GEORGETOWN TWP SEC 34, Ottawa, MI

Built 2001 Load: 54.9 t ADT: 16,313

CHARLTON PARK ROAD

Good

Over: THORNAPPLE RIVER

5 MI SE OF HASTINGS, Barry, MI

Built 1956 Load: 55.1 t ADT: 670

COUNTY FARM ROAD

Good

Over: SPAULDING EXTENSION

0.3 MI S OF PARKS RD, Clinton, MI

Built 2010 Load: 55.1 t ADT: 695

PICKARD ROAD

Good

Over: NORTH BR CHIPPEWA RIVER

SEC 12-13 DEERFIELD TWP, Isabella, MI

Built 2019 Load: 55.1 t ADT: 4,252

BENTLEY STREET

Good

Over: FARMERS CREEK

250 FT SOUTH OF M-21 JUNC, Lapeer, MI

Built 1978 Load: 55.1 t ADT: 1,094

HAGEN ROAD

Good

Over: DEER CREEK

1.0 MI EAST OF NORTH AVE, Macomb, MI

Built 2014 Load: 55.1 t ADT: 231

US-41

Good

Over: BIG CREEK

2.1 MI SE OF M-28, Marquette, MI

Built 1952 Load: 55.1 t ADT: 6,982

Showing 9,251-9,300 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.