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

HOWE ROAD

Fair

Over: US-127

0.9 MI S LOOKING GLASS R, Clinton, MI

Built 1997 Load: 36.3 t ADT: 400

M-55

Fair

Over: US-131

1/4 MI EAST OF CADILLAC, Wexford, MI

Built 1997 Load: 36.3 t ADT: 10,400

OXBOW ROAD

Fair

Over: US-31

4.2 MI N OF OLD US-31, Berrien, MI

Built 1999 Load: 36.3 t ADT: 2,800

JOHNSON RD

Fair

Over: LITTLE MANISTEE RIVER

ELK TWP SEC 24, Lake, MI

Built 1950 Load: 36.3 t ADT: 450

BIDWELL ROAD

Fair

Over: SOUTH BR HOG CREEK

BUTLER TWP SEC 28-33, Branch, MI

Built 1993 Load: 36.4 t ADT: 232

INDIANHEAD VALLEY

Fair

Over: JACKSON CREEK

SEC 31 WAKEFIELD TWP, Gogebic, MI

Built 1984 Load: 36.4 t ADT: 23

JA ROAD

Fair

Over: CARP RIVER

1.5 MI N OF US41, Marquette, MI

Built 1934 Load: 36.4 t ADT: 1,004

NORTH GETTY

Fair

Over: BEAR CREEK

0.5 MI S OF RIVER RD, Muskegon, MI

Built 1978 Load: 36.4 t ADT: 1,799

MOOREVILLE ROAD

Fair

Over: SALINE RIVER

YORK TWP SEC 28, Washtenaw, MI

Built 1981 Load: 36.4 t ADT: 6,114

FREESOIL ROAD

Fair

Over: BIG SAUBLE RIVER

4.1 MI E OF FREESOIL, Mason, MI

Built 1960 Load: 36.4 t ADT: 800

CUSTER RD

Fair

Over: N BR LINCOLN RIVER

0.25 MI N OF FOUNTAIN RD, Mason, MI

Built 1960 Load: 36.4 t ADT: 1,100

FOUNTAIN ROAD

Fair

Over: N BR LINCOLN RIVER

0.25 MI E OF CUSTER RD, Mason, MI

Built 1960 Load: 36.4 t ADT: 1,000

SCHOENHERR RD

Fair

Over: MIDDLE BR CLINTON RIVER

0.1 MI NORTH OF 25 MILE, Macomb, MI

Built 1969 Load: 36.5 t ADT: 5,309

4 3/4 MILE RD

Fair

Over: PINE RIVER

@ GORDONVILLE RD, Midland, MI

Built 1997 Load: 36.5 t ADT: 654

DAGGET ROAD

Fair

Over: LITTLE MUSKEGON RIVER

0.60 SOUTH OF TAMARACK RD, Montcalm, MI

Built 1987 Load: 36.5 t ADT: 124

PATTERSON ROAD

Fair

Over: CROCKERY CREEK

0.9 MI W OF BLACKMERE RD, Muskegon, MI

Built 1991 Load: 36.5 t ADT: 68

DECKER ROAD

Fair

Over: S BR CASS RIVER I/C DRN

SEC 15-16 EVERGREEN TWP, Sanilac, MI

Built 1969 Load: 36.5 t ADT: 135

FILMORE ROAD

Fair

Over: PRAIRIE RIVER

4 MI E OF CENTREVILLE, St. Joseph, MI

Built 1970 Load: 36.5 t ADT: 233

60 TH STREET

Fair

Over: US-31

0.5 MI W OF HOLLAND, Allegan, MI

Built 1964 Load: 36.6 t ADT: 1,877

US-131 NB

Fair

Over: GRAND ELK RR

6.0 MI N OF WAYLAND, Allegan, MI

Built 1958 Load: 36.6 t ADT: 18,376

US-131 SB

Fair

Over: GRAND ELK RR

6.0 MI N OF WAYLAND, Allegan, MI

Built 1958 Load: 36.6 t ADT: 18,376

55TH STREET

Fair

Over: SCOTT CREEK

LEE TWP SEC 9, Allegan, MI

Built 1979 Load: 36.6 t ADT: 538

US-23

Fair

Over: RIFLE RIVER

IN OMER, Arenac, MI

Built 1972 Load: 36.6 t ADT: 8,450

SAGATOO ROAD

Fair

Over: S BRANCH PINE RIVER

0.1 MI EAST OF CITY LIMIT, Arenac, MI

Built 1972 Load: 36.6 t ADT: 1,960

SALZBURG RD

Fair

Over: I-75

4.0 MI N OF SAGINAW COL, Bay, MI

Built 1960 Load: 36.6 t ADT: 5,197

I-75 SB

Fair

Over: WHEELER ROAD

1.7 MI S OF KAWKAWLIN, Bay, MI

Built 1968 Load: 36.6 t ADT: 11,225

US-31

Fair

Over: BETSIE RIVER

1.2 MI S OF BENZONIA, Benzie, MI

Built 1984 Load: 36.6 t ADT: 8,344

UNION CITY ROAD

Fair

Over: COLDWATER RIVER

UNION TWP SEC 4, Branch, MI

Built 1955 Load: 36.6 t ADT: 2,155

I-194 NB OFF RAMP

Fair

Over: CONRAIL (ABN)

3.0 MI N OF I-94, Calhoun, MI

Built 1966 Load: 36.6 t ADT: 12,203

I-94 BL (DICKMAN)

Fair

Over: GTW RR

IN SPRINGFIELD, Calhoun, MI

Built 1942 Load: 36.6 t ADT: 18,057

P DRIVE SOUTH

Fair

Over: LAMPSON RUN

HOMER TWP SEC 8, Calhoun, MI

Built 1973 Load: 36.6 t ADT: 681

BRIMLEY RD(6 MILE)

Fair

Over: I-75

3.0 MI S OF I-75 BS, Chippewa, MI

Built 1963 Load: 36.6 t ADT: 1,090

FRONT STREET

Fair

Over: MAPLE RIVER

IN OVID, Clinton, MI

Built 1992 Load: 36.6 t ADT: 977

I-96 WB

Fair

Over: LANSING RD

I-96 & LANSING RD, Eaton, MI

Built 2001 Load: 36.6 t ADT: 21,057

I-69

Fair

Over: CSX RR FENTON THREAD(ABN

IN FLINT, Genesee, MI

Built 1970 Load: 36.6 t ADT: 65,450

I-475 RMP TO I-75

Fair

Over: I-475RAMP B & I-75

N JCT I-75, Genesee, MI

Built 1971 Load: 36.6 t ADT: 3,100

REID ROAD

Fair

Over: JONES CREEK

BET W CO LINE & DUFFIELD, Genesee, MI

Built 1962 Load: 36.6 t ADT: 139

HARRISON

Fair

Over: FLINT RIVER

IN FLINT, Genesee, MI

Built 1953 Load: 36.6 t ADT: 6,867

TAFT ROAD

Fair

Over: MAPLE RIVER

SEC 21-28 ELBA TWP, Gratiot, MI

Built 1984 Load: 36.6 t ADT: 115

PINGREE ROAD

Fair

Over: NORTH SHADE DRAIN

SEC 1-2 NORTH SHADE TWP, Gratiot, MI

Built 1968 Load: 36.6 t ADT: 80

POPE ROAD

Fair

Over: S BR KALAMAZOO RIVER

0.1 MILE S OF MOSHERVILLE, Hillsdale, MI

Built 1915 Load: 36.6 t ADT: 55

I-96 EB

Fair

Over: I-96BL RAMPS

IN LANSING (I96 BL RAMPS), Ingham, MI

Built 1962 Load: 36.6 t ADT: 19,427

I-96 WB

Fair

Over: OKEMOS RD

S LTS OF PORTLAND, Ionia, MI

Built 1959 Load: 36.6 t ADT: 20,074

M-21

Fair

Over: PRAIRIE CREEK

2.6 MI E OF M-66, Ionia, MI

Built 1929 Load: 36.6 t ADT: 8,456

I-94

Fair

Over: PARMA RD

6.3 MI W OF M-60, Jackson, MI

Built 1954 Load: 36.6 t ADT: 30,873

US-127

Fair

Over: GRAND RIVER

500 N OF REED ROAD, Jackson, MI

Built 1953 Load: 36.6 t ADT: 16,125

COONHILL ROAD

Fair

Over: PORTAGE RIVER DRAIN

2 MI SOUTH OF MUNITH, Jackson, MI

Built 1975 Load: 36.6 t ADT: 900

I-96EB CONN I-296S

Fair

Over: W RIVER DRV CSX & PC RR

IN WALKER, Kent, MI

Built 1962 Load: 36.6 t ADT: 28,250

M-37

Fair

Over: I-96 WB

IN WALKER, Kent, MI

Built 1961 Load: 36.6 t ADT: 52,285

I-196 M-21 WB

Fair

Over: BUTTERWORTH ST

IN GRAND RAPIDS, Kent, MI

Built 1964 Load: 36.6 t ADT: 20,625

Showing 2,601-2,650 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.