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

GATES ROAD

Good

Over: GRAND RIVER

2.6 M N 2 M W CEMENT CITY, Jackson, MI

Built 2004 Load: 32.7 t ADT: 124

BYRON CENTER AVE

Good

Over: BUCK CREEK

IN WYOMING, Kent, MI

Built 1986 Load: 32.7 t ADT: 21,839

COLUMBIAVILLE ROAD

Good

Over: SOUTH BR. FLINT RIVER

SEC. 25-36 MARATHON TWP., Lapeer, MI

Built 1996 Load: 32.7 t ADT: 1,870

NEWARK ROAD

Good

Over: BELLE RIVER DRAIN

SEC. 21-28 IMLAY TWP., Lapeer, MI

Built 1985 Load: 32.7 t ADT: 1,120

LAWRENCE RD

Good

Over: BEAN CREEK

EAST OF DILLON HWY, Lenawee, MI

Built 1993 Load: 32.7 t ADT: 243

MUNSON HWY

Good

Over: LIME CREEK

0.2 MI SOUTH OF LIME CRK, Lenawee, MI

Built 1985 Load: 32.7 t ADT: 185

MOORE RD

Good

Over: BEAVER CREEK

0.1 MI W OF CARSON HWY, Lenawee, MI

Built 1994 Load: 32.7 t ADT: 675

GROSVENOR HWY

Good

Over: SWAMP RAISIN DRAIN

0.2 MI SOUTH OF MITCHELL, Lenawee, MI

Built 2008 Load: 32.7 t ADT: 192

HOAGLAND HWY

Good

Over: SCHENK BEN KELLY DRAIN

0.1 MI NORTH OF HOLLOWAY, Lenawee, MI

Built 2003 Load: 32.7 t ADT: 36

HODDINOTT RD

Good

Over: WALKER CREEK

0.5 MI W OF SPRINGVILLE, Lenawee, MI

Built 1983 Load: 32.7 t ADT: 35

W YANKEE RD

Good

Over: SILVERCREEK

0.2 MI WEST OF WESTON RD, Lenawee, MI

Built 1987 Load: 32.7 t ADT: 828

SILVER LAKE ROAD

Good

Over: DAVIS CREEK

SEC 21 GREEN OAK TWP, Livingston, MI

Built 1958 Load: 32.7 t ADT: 7,030

TAYLOR ROAD

Good

Over: TAYLOR CREEK

2 MI S & 0.5 MI W OF PICK, Mackinac, MI

Built 1967 Load: 32.7 t ADT: 164

U TRN E/MOUND RD

Good

Over: M-59

0.5 MI WEST OF UTICA, Macomb, MI

Built 1994 Load: 32.7 t ADT: 8,500

WB METRO PARKWAY

Good

Over: HARRINGTON DRAIN

0.75 MI WEST OF M-97, Macomb, MI

Built 1952 Load: 32.7 t ADT: 18,950

23 MILE RD

Good

Over: MIDDLE BR CLINTON RIVER

0.1MI EAST OF ROMEO PLANK, Macomb, MI

Built 2006 Load: 32.7 t ADT: 15,350

NB & SB MOUND RD

Good

Over: BIG BEAVER CREEK

0.5 MI N OF 14 MILE RD, Macomb, MI

Built 1996 Load: 32.7 t ADT: 78,001

GARFIELD RD

Good

Over: CLINTON RIVER

0.1 MI S OF CLINTON R RD, Macomb, MI

Built 1986 Load: 32.7 t ADT: 32,581

NORTH AVE

Good

Over: COON CREEK

0.3 MI NORTH OF 31 MILE, Macomb, MI

Built 1999 Load: 32.7 t ADT: 7,160

30 MILE ROAD

Good

Over: COON CREEK

0.1 MI EAST OF NORTH AVE, Macomb, MI

Built 1994 Load: 32.7 t ADT: 180

HEALY LAKE ROAD

Good

Over: BIG BEAR CREEK

4.5 MILES NORTH OF KALEVA, Manistee, MI

Built 1992 Load: 32.7 t ADT: 656

US-41

Good

Over: NELSON CREEK BURIED

4.9 MI NW OF ALGER COL, Marquette, MI

Built 1939 Load: 32.7 t ADT: 3,609

LAKESHORE DRIVE

Good

Over: CARP CREEK

0.1 MI N OF US-41/M-28, Marquette, MI

Built 1993 Load: 32.7 t ADT: 4,750

JEFFERSON STREET

Good

Over: BIG CREEK

VILLAGE OF MORLEY, Mecosta, MI

Built 1992 Load: 32.7 t ADT: 3,081

SOBIESKI RD

Good

Over: LITTLE RIVER

8.0 MI N OF MENOMINEE, Menominee, MI

Built 1992 Load: 32.7 t ADT: 410

ROUTE 338

Good

Over: LITTLE RIVER

1 MI E OF CARBONDALE, Menominee, MI

Built 1993 Load: 32.7 t ADT: 461

ROUTE 352

Good

Over: WALTON RIVER

7 MI E OF STEPHENSON, Menominee, MI

Built 1981 Load: 32.7 t ADT: 569

ROUTE 566

Good

Over: BIG CEDAR RIVER

IN SPALDING, Menominee, MI

Built 1985 Load: 32.7 t ADT: 150

40.75 MILE ROAD

Good

Over: FOURTY SEVEN CREEK

0.5 MI. W OF HOULE, Menominee, MI

Built 1996 Load: 32.7 t ADT: 100

G-2 ROAD

Good

Over: BIG CEDAR RIVER

1 MI. W OF WILSON, Menominee, MI

Built 1977 Load: 32.7 t ADT: 100

VANDERMEULEN ROAD

Good

Over: MOSQUITO CREEK

SECTION 26/27 T22N R7W, Missaukee, MI

Built 1993 Load: 32.7 t ADT: 480

BLUE ROAD

Good

Over: MOSQUITO CREEK

SECTION 26/35 T22N R7W, Missaukee, MI

Built 1993 Load: 32.7 t ADT: 300

REA ROAD

Good

Over: MIDDLE BRANCH MACON DRAI

0.2 MI N OF KENT ROAD, Monroe, MI

Built 1990 Load: 32.7 t ADT: 65

CUTLER RD

Good

Over: BLACK CREEK

0.2 MI E OF CARLSON RD, Montcalm, MI

Built 2001 Load: 32.7 t ADT: 133

LAKESHORE DRIVE

Good

Over: RUDDIMAN CREEK

0.1 MI N OF ADDISON AVE, Muskegon, MI

Built 1900 Load: 32.7 t ADT: 12,520

ADAMS ROAD

Good

Over: ROUGE RIVER

BET WATTLES AND BIG BEAVE, Oakland, MI

Built 2004 Load: 32.7 t ADT: 16,577

DEQUINDRE ROAD

Good

Over: GIBSON DRAIN

BET WATTLES AND LONG LK R, Oakland, MI

Built 2003 Load: 32.7 t ADT: 22,495

BENSTEIN

Good

Over: HURON RIVER

NORTH OF OAKLEY PARK, Oakland, MI

Built 2008 Load: 32.7 t ADT: 12,380

LONG LAKE RD

Good

Over: ROUGE RIVER

BET ADAMS AND COOLIDGE RD, Oakland, MI

Built 1984 Load: 32.7 t ADT: 19,700

LONG LAKE RD

Good

Over: GIBSON DRAIN

BET JOHN R AND DEQUINDRE, Oakland, MI

Built 2004 Load: 32.7 t ADT: 22,575

KIRKWAY RD

Good

Over: LOWER LONG LAKE

0.2 MI N OF LONG LAKE RD, Oakland, MI

Built 2004 Load: 32.7 t ADT: 900

PERRY ST

Good

Over: PAINT CREEK

S OF FLINT ST, Oakland, MI

Built 1990 Load: 32.7 t ADT: 3,506

MAIN ST

Good

Over: HURON RIVER

IN MILFORD S OF CANAL ST, Oakland, MI

Built 1989 Load: 32.7 t ADT: 14,620

PETERS ST

Good

Over: HURON RIVER (MILL POND)

W OF MILFORD RD, Oakland, MI

Built 2008 Load: 32.7 t ADT: 1,500

OLD NOVI ROAD

Good

Over: MIDDLE RIVER ROUGE

0.15 MI E OF OAKLAND AVE, Oakland, MI

Built 1994 Load: 32.7 t ADT: 500

UNIVERSITY ST

Good

Over: PAINT CREEK

EAST OF ROCHESTER RD, Oakland, MI

Built 1966 Load: 32.7 t ADT: 9,380

SECOND ST

Good

Over: PAINT CREEK

EAST OF ROCHESTER RD, Oakland, MI

Built 2003 Load: 32.7 t ADT: 12,710

SHAGBARK ROAD

Good

Over: SARGENT CREEK

0.3 MI N OF WALTON BLVD, Oakland, MI

Built 1965 Load: 32.7 t ADT: 809

SOUTER ROAD

Good

Over: BARNARD DRAIN

0.2 MI S OF MAPLE ROAD, Oakland, MI

Built 1974 Load: 32.7 t ADT: 950

192 ND AVENUE

Good

Over: CUSHMAN CREEK

0.4 MI S OF MC KINLEY, Oceana, MI

Built 1987 Load: 32.7 t ADT: 940

Showing 6,851-6,900 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.