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

REED RD

Good

Over: HOLLY DRAIN

1.2 MI SE OF VERNON, Shiawassee, MI

Built 1994 Load: 40.5 t ADT: 179

M-19

Good

Over: COWHEY CREEK

1.8 MI S OF I-69, St. Clair, MI

Built 2007 Load: 40.5 t ADT: 6,607

BRICKER ROAD

Good

Over: WHACKENBUSH DRAIN

SEC. 17-18 KENOCKEE TWP, St. Clair, MI

Built 2022 Load: 40.5 t ADT: 195

EB E GRAND BLVD

Good

Over: I-94

IN DETROIT, Wayne, MI

Built 2021 Load: 40.5 t ADT: 1,950

CADILLAC AVE

Good

Over: I-94

IN DETROIT, Wayne, MI

Built 2022 Load: 40.5 t ADT: 4,255

M-14 (OLD)

Good

Over: WILLOW CREEK

2.7 MI E OF WASHTENAW COL, Wayne, MI

Built 2003 Load: 40.5 t ADT: 13,944

GARFIELD ST U-TRN

Good

Over: I-96

IN REDFORD TWP, Wayne, MI

Built 1974 Load: 40.5 t ADT: 5,600

NB SERV RD

Good

Over: I-96

IN DETROIT, Wayne, MI

Built 1970 Load: 40.5 t ADT: 17,760

LIVERNOIS AVE

Good

Over: I-75

IN DETROIT, Wayne, MI

Built 2021 Load: 40.5 t ADT: 1,592

BELLEVILLE ROAD

Good

Over: HURON RIVER

BELLEVILLE S/I-94, Wayne, MI

Built 1924 Load: 40.5 t ADT: 21,710

COOK ROAD

Good

Over: DAWE DRAIN

0.2 MI. E. OF TORREY RD., Genesee, MI

Built 1998 Load: 40.5 t ADT: 389

M-5

Good

Over: I-96/I-696

NOVI TWP SEC 13, Oakland, MI

Built 1992 Load: 40.5 t ADT: 53,522

MAIN STREET

Good

Over: LINDEN CREEK

VILLAGE OF LANSE, Baraga, MI

Built 2004 Load: 40.5 t ADT: 6,570

MITCHELL ROAD

Good

Over: MINNEHAHA CREEK

SPRINGVALE TWP SEC 5 & 8, Emmet, MI

Built 2006 Load: 40.5 t ADT: 3,064

I-69 EB

Good

Over: BURT DRAIN

1.2 MI E OF GOODELLS RD, St. Clair, MI

Built 2015 Load: 40.5 t ADT: 6,625

I-69 WB

Good

Over: BURT DRAIN

1.2 MI E OF GOODELLS RD, St. Clair, MI

Built 2016 Load: 40.5 t ADT: 6,625

O AVENUE

Good

Over: PORTAGE RIVER

0.25 MI E OF 36TH STREET, Kalamazoo, MI

Built 2014 Load: 40.5 t ADT: 200

FENNER RD

Good

Over: GREEN CREEK

0.31 MI W OF N BUYS RD, Muskegon, MI

Built 2022 Load: 40.5 t ADT: 500

BIG HILL ROAD

Good

Over: FAWN RIVER

3 MI SE OF STURGIS, St. Joseph, MI

Built 2007 Load: 40.6 t ADT: 15

WEBSTER BRIDGE RD

Good

Over: JORDAN RIVER

1.5 MI S OF COUNTY LINE, Antrim, MI

Built 1987 Load: 40.8 t ADT: 90

CHARLTON PARK ROAD

Good

Over: LITTLE THORNAPPLE RIVER

CARLTON TWP SEC 23, Barry, MI

Built 2020 Load: 40.8 t ADT: 557

M-47

Good

Over: US-10

11.5 MI W OF BAY CITY, Bay, MI

Built 2014 Load: 40.8 t ADT: 6,030

I-69 BL

Good

Over: SAUK RIVER

IN COLDWATER, Branch, MI

Built 1929 Load: 40.8 t ADT: 6,063

M-96 (COLUMBIA)

Good

Over: RAYMOND RD

1.9 MI E OF I-194, Calhoun, MI

Built 2014 Load: 40.8 t ADT: 11,200

I-69

Good

Over: REMY-CHANDLER DRAIN

0.4 MILES EAST OF US-127, Clinton, MI

Built 1985 Load: 40.8 t ADT: 34,700

TALLMAN ROAD

Good

Over: MAPLE RIVER

BETWEEN ISLAND RDS, Clinton, MI

Built 1969 Load: 40.8 t ADT: 1,263

CHEESE FACTORY RD

Good

Over: E BR STURGEON RIVER

IN FOSTER CITY, Dickinson, MI

Built 1992 Load: 40.8 t ADT: 15

M-100

Good

Over: GTW RR

N LTS OF POTTERVILLE, Eaton, MI

Built 2015 Load: 40.8 t ADT: 5,425

BASE LINE HWY

Good

Over: INDIAN CREEK

1 MI S OF OLIVET, Eaton, MI

Built 1996 Load: 40.8 t ADT: 72

LUCE ROAD

Good

Over: NORTH END DRAIN

SEC 16-17 ARCADA TWP, Gratiot, MI

Built 1988 Load: 40.8 t ADT: 2,590

BIPPLEY ROAD

Good

Over: SEBEWA CREEK

0.75 MI N 0.25 MI W SEBEW, Ionia, MI

Built 2003 Load: 40.8 t ADT: 99

LANSING AVE

Good

Over: I-94

0.6 MI E OF M-50, Jackson, MI

Built 2021 Load: 40.8 t ADT: 27,000

FRANCIS STREET

Good

Over: GRAND RIVER

1 MI N OF VANDERCOOK LAKE, Jackson, MI

Built 1993 Load: 40.8 t ADT: 6,700

THORNVILLE ROAD

Good

Over: SOUTH BR. FLINT RIVER

SEC. 19 DRYDEN TWP., Lapeer, MI

Built 1985 Load: 40.8 t ADT: 201

VALLEY RD

Good

Over: BEAVER CREEK

0.1 MI WEST OF CARSON HWY, Lenawee, MI

Built 2005 Load: 40.8 t ADT: 3,350

ARMADA RIDGE RD

Good

Over: COON CREEK

0.8 MI EAST OF WOLCOTT RD, Macomb, MI

Built 1986 Load: 40.8 t ADT: 2,556

ROMEO PLANK RD

Good

Over: N B CLINTON RIVER

0.7 MI S OF 32 MILE ROAD, Macomb, MI

Built 1964 Load: 40.8 t ADT: 5,760

RYAN RD

Good

Over: PLUM BROOK DRAIN

NORTH OF 18.5 MILE RD, Macomb, MI

Built 1999 Load: 40.8 t ADT: 11,392

TUTTLE ROAD

Good

Over: N BR LINCOLN RIVER

3 MI W 0.5 MI N FOUNTAIN, Mason, MI

Built 2022 Load: 40.8 t ADT: 49

22.5 MILE ROAD

Good

Over: LITTLE CEDAR RIVER

1 MI. S OF DAGGETT, Menominee, MI

Built 2022 Load: 40.8 t ADT: 275

US-24

Good

Over: LITTLE SWAN CREEK

4.2 MI SW OF WAYNE COL, Monroe, MI

Built 1922 Load: 40.8 t ADT: 10,923

I-75 NB

Good

Over: STONY CREEK

3.2 MI NE OF M-50, Monroe, MI

Built 2015 Load: 40.8 t ADT: 36,850

IDA CENTER ROAD

Good

Over: LOCKWOOD DRAIN

0.85 E OF LEWIS ROAD, Monroe, MI

Built 2021 Load: 40.8 t ADT: 920

I-75 NB

Good

Over: LIVERNOIS RD

IN TROY, Oakland, MI

Built 2019 Load: 40.8 t ADT: 53,550

I-75 SB

Good

Over: LIVERNOIS RD

IN TROY, Oakland, MI

Built 2020 Load: 40.8 t ADT: 79,250

US-131 NB RAMP

Good

Over: JOHNSON CREEK

1.5 MI NW OF REED CITY, Osceola, MI

Built 1984 Load: 40.8 t ADT: 1,400

BAKER RD

Good

Over: I-75

3.6 MI SE OF M-46, Saginaw, MI

Built 2015 Load: 40.8 t ADT: 1,530

FEHN ROAD

Good

Over: WHITMORE DRAIN

0.5 MI N OF FROST ROAD, Saginaw, MI

Built 2004 Load: 40.8 t ADT: 95

M-90

Good

Over: E BR MILLS CREEK

7.5 MI E OF M-19, Sanilac, MI

Built 2000 Load: 40.8 t ADT: 5,001

AITKEN ROAD

Good

Over: ELK CREEK DRAIN

SEC 3-10 ELK TWP, Sanilac, MI

Built 1985 Load: 40.8 t ADT: 165

Showing 7,951-8,000 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.