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

CANAL ROAD

Good

Over: CANADIAN NATIONAL RR

WINDSOR TWP SEC 3-4, Eaton, MI

Built 2004 Load: 71.9 t ADT: 7,624

OLIVER ROAD

Good

Over: CARP LAKE RIVER

WAWATAM TWP SEC 32, Emmet, MI

Built 2006 Load: 71.9 t ADT: 16

WOODBRIDGE ROAD

Good

Over: BAD RIVER

SEC 34-35 LAFAYETTE TWP, Gratiot, MI

Built 1993 Load: 72.1 t ADT: 99

TWENTY-FOURTH ST

Good

Over: PORTAGE CREEK

1.2 MI S OF VICKSBURG, Kalamazoo, MI

Built 1949 Load: 72.3 t ADT: 3,672

LEONARD STREET

Good

Over: CROCKERY CREEK

0.02 MILES E OF 112TH AVE, Ottawa, MI

Built 2006 Load: 72.3 t ADT: 2,980

MT VERNON RD

Good

Over: TRIBUTARY OF STONEY CRK

0.3 MI S OF 31 MI RD, Macomb, MI

Built 2007 Load: 72.3 t ADT: 121

TANK SITE NO 1

Good

Over: E BR AU SABLE RIVER

0.15 MI N OF JONES LK RD, Crawford, MI

Built 1999 Load: 72.3 t ADT: 50

BEACON HIL TOIVOLA

Good

Over: E BR GRAVERAET RIVER

1 MI S OF HEIKKINEN SCHL, Houghton, MI

Built 2019 Load: 72.3 t ADT: 50

I-75 NB

Good

Over: I-75 SB TO EB RAMP

I-75 & I-375 INTCHG, Wayne, MI

Built 1970 Load: 72.6 t ADT: 11,374

CASTOR ROAD

Good

Over: N BR CARROLL CREEK

JEROME TWP SEC 31, Midland, MI

Built 2016 Load: 72.6 t ADT: 158

NORTH JEFFERSON RD

Good

Over: HERNER DRAIN

MILLS TWP SEC 3/4, Midland, MI

Built 2016 Load: 72.6 t ADT: 283

USFS RTE 2473

Good

Over: BIG INDIAN RIVER

0.5 MI W OF MIRROR LAKE, Alger, MI

Built 2005 Load: 72.6 t ADT: 50

48TH STREET

Good

Over: THORNAPPLE RIVER

0.80 MI E OF BURGER DRIVE, Kent, MI

Built 2003 Load: 72.7 t ADT: 1,513

MEADOWBROOK RD

Good

Over: COURTER DITCH

0.4 MI N OF NINE MILE RD, Oakland, MI

Built 1976 Load: 72.7 t ADT: 9,100

142ND AVE

Good

Over: US-131

3.0 MI N OF WAYLAND, Allegan, MI

Built 2011 Load: 72.9 t ADT: 10,163

COUNTY ROAD L134

Good

Over: GREEN CREEK

1.5 MI S 1 MI W OF NISULA, Houghton, MI

Built 1992 Load: 72.9 t ADT: 50

18 MILE RD

Good

Over: ROGUE RIVER

0.20 MI E OF AFTON AVE, Kent, MI

Built 2023 Load: 72.9 t ADT: 925

WOODSIDE DRIVE

Good

Over: CANOE STREAM

BELLE ISLE, Wayne, MI

Built 1901 Load: 72.9 t ADT: 296

36TH AVE

Good

Over: BRANDYWINE CREEK

500 W OF 3750TH ST, Van Buren, MI

Built 2019 Load: 72.9 t ADT: 75

STURGEON VALLEY RD

Good

Over: PIGEON RIVER

8.9 MI E OF VANDERBILT, Otsego, MI

Built 2009 Load: 73.2 t ADT: 260

COXEY ROAD

Good

Over: PIGEON RIVER

SEC 9 T35N R2W, Cheboygan, MI

Built 2009 Load: 73.5 t ADT: 1,239

REID ROAD

Good

Over: SWARTZ CREEK

BET US23 XWAY & BREWER RD, Genesee, MI

Built 1929 Load: 73.5 t ADT: 594

NB CONN TO I-96 WB

Good

Over: I-96 WB TO 36TH SB CONN

CASCADE TWP, Kent, MI

Built 2005 Load: 73.5 t ADT: 12,500

WISE ROAD

Good

Over: FLAT RIVER

0 20 EAST OF SHEAR ROAD, Montcalm, MI

Built 2019 Load: 73.9 t ADT: 2,860

CR 681

Good

Over: PAW PAW RIVER

1.25 MI N OF RED ARROW HW, Van Buren, MI

Built 1999 Load: 73.9 t ADT: 3,092

VREELAND RD

Good

Over: I-75

S LTS OF WOODHAVEN, Wayne, MI

Built 2002 Load: 73.9 t ADT: 3,594

LINDEN CRK PARKWAY

Good

Over: HEWITT DRAIN

FLINT TWP SEC 33, Genesee, MI

Built 2000 Load: 73.9 t ADT: 77

MOONSTONE DRIVE

Good

Over: THREAD CREEK

GRAND BLANC TWP SEC 12, Genesee, MI

Built 2004 Load: 73.9 t ADT: 660

PETERSBURG RD

Good

Over: RIVER RAISIN

0.3 MI N OF IDA WEST RD, Monroe, MI

Built 1959 Load: 74.0 t ADT: 920

M-123

Good

Over: MURPHY CREEK

9.8 MI N OF NEWBERRY, Luce, MI

Built 2010 Load: 74.2 t ADT: 890

FINZEL ROAD

Good

Over: STONY CREEK OVERFLOW

0.1 MI N OF S STONY CR RD, Monroe, MI

Built 2009 Load: 74.2 t ADT: 170

M-231

Good

Over: UNNAMED CREEK

275 FT S OF CYPRUS ST, Ottawa, MI

Built 2014 Load: 74.2 t ADT: 18,700

SEVEN MILE ROAD

Good

Over: TEBO DRAIN

100 FT N OF ERICKSON RD, Bay, MI

Built 2020 Load: 74.5 t ADT: 1,835

BEECHER ROAD

Good

Over: MISTEGUAY CREEK

BET DUFFIELD & M-13, Genesee, MI

Built 1928 Load: 74.5 t ADT: 925

HOLT ROAD

Good

Over: DEER CREEK

3 MILES S OF WILLIAMSTON, Ingham, MI

Built 1920 Load: 74.5 t ADT: 1,192

CASS CITY ROAD

Good

Over: STATE & COLLING I/C DRN

SEC 27-34 COLUMBIA TWP, Tuscola, MI

Built 1992 Load: 74.5 t ADT: 126

MCGREGOR ROAD

Good

Over: PORTAGE LAKE OUTLET

DEXTER TWP SECTION 1, Washtenaw, MI

Built 2016 Load: 74.5 t ADT: 4,932

DECKER ROAD

Good

Over: LITTLE SWAN CREEK

2 MI S OF COLON, St. Joseph, MI

Built 2017 Load: 74.8 t ADT: 315

RATTLE RUN ROAD

Good

Over: PINE RIVER

PVT CLM #307 ST CLAIR TWP, St. Clair, MI

Built 1931 Load: 75.2 t ADT: 2,830

NEWBURGH ROAD

Good

Over: LOWER ROUGE RIVER

IN CITY OF WAYNE, Wayne, MI

Built 2006 Load: 75.2 t ADT: 13,600

I-96 RAMPS

Good

Over: WETLANDS WILDLIFE PATH

CASCADE TWP, Kent, MI

Built 2005 Load: 75.2 t

RUDY ROAD

Good

Over: DOWAGIAC RIVER

1 MI E OF M-51, Cass, MI

Built 2022 Load: 75.5 t ADT: 70

US-131 NB

Good

Over: 13 MILE ROAD

1.5 MI S OF BIG RAPIDS, Mecosta, MI

Built 1981 Load: 75.5 t ADT: 7,789

US-131 NB

Good

Over: HANDY CREEK

0.5 MI N OF EDGAR RD M46, Montcalm, MI

Built 1979 Load: 75.5 t ADT: 10,150

GRD RIV AVE EXIT R

Good

Over: I-96 RAMP

IN DETROIT, Wayne, MI

Built 1971 Load: 75.5 t ADT: 2,400

I-275

Good

Over: LITTLE SWAN CREEK

0.35 MI N OF E SIGLER RD, Monroe, MI

Built 1968 Load: 75.5 t ADT: 27,104

BURTON STREET

Good

Over: PLASTER CREEK

450 FT EAST OF CLYDE PARK, Kent, MI

Built 1996 Load: 75.8 t ADT: 22,635

JEFFERSON ROAD

Good

Over: INDIAN CREEK DRAIN

SEC. 16-17 BURLINGTON TWP, Lapeer, MI

Built 2017 Load: 75.8 t ADT: 1,034

CHARTIER ROAD

Good

Over: MARINE CITY DREDGE CUT

SEC 10 COTTRELLVILLE TWP, St. Clair, MI

Built 1922 Load: 75.8 t ADT: 2,800

GERMANIA ROAD

Good

Over: EVERGREEN-AUSTIN DRAIN

SEC 13-14 EVERGREEN TWP, Sanilac, MI

Built 1986 Load: 76.1 t ADT: 514

Showing 9,851-9,900 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.