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

PINCONNING ROAD

Good

Over: PINCONNING RIVER

1500 FT W OF EIGHT MILE, Bay, MI

Built 1995 Load: 31.4 t ADT: 3,218

NORTH SHORE DRIVE

Good

Over: PAW PAW RIVER

7 BLKS N OF MAIN ST, Berrien, MI

Built 2006 Load: 31.4 t ADT: 2,500

LAKE SHORE DR FH42

Good

Over: PENDILLS CREEK

5 MI NW OF RACO, Chippewa, MI

Built 1992 Load: 31.4 t ADT: 260

LEWISTON GRADE RD

Good

Over: E BRANCH AU SABLE RIVER

5 MI. NE GRAYLING, Crawford, MI

Built 1960 Load: 31.4 t ADT: 15

PATTERSON LAKE RD

Good

Over: PORTAGE RIVER

SEC 33 PUTNAM TWP, Livingston, MI

Built 1991 Load: 31.4 t ADT: 2,017

OLD STRONACH ROAD

Good

Over: LITTLE MANISTEE RIVER

1.5 MILE EAST OF STRONACH, Manistee, MI

Built 2011 Load: 31.4 t ADT: 280

D-1 ROAD

Good

Over: TEN MILE CREEK

2 MI. N OF WHITNEY, Menominee, MI

Built 1999 Load: 31.4 t ADT: 35

EXETER ROAD

Good

Over: SWAN CREEK

0.3 MI S OF NEWBURG ROAD, Monroe, MI

Built 2002 Load: 31.4 t ADT: 110

TEMPERANCE ROAD

Good

Over: HALFWAY CREEK

.5 MI E OF WHITEFORD RD, Monroe, MI

Built 1980 Load: 31.4 t ADT: 700

STANTON RD CO 522

Good

Over: FLAT RIVER

0.5 MI. W. OF M-91 ON 522, Montcalm, MI

Built 1966 Load: 31.4 t ADT: 1,333

MOUNT VERNON ST

Good

Over: M-10

IN SOUTHFIELD (M-10), Oakland, MI

Built 1963 Load: 31.4 t ADT: 5,999

FITZGERALD STREET

Good

Over: CROCKERY CREEK

SECTION 23 CROCKERY TWP, Ottawa, MI

Built 1977 Load: 31.4 t ADT: 100

ELMS ROAD

Good

Over: SILVER CREEK

0.7 MI N OF BIRCH RUN RD, Saginaw, MI

Built 1997 Load: 31.4 t ADT: 281

MUSHROOM ROAD

Good

Over: SOUTH BR WHITE CREEK

SEC 6-7 KINGSTON TWP, Tuscola, MI

Built 1978 Load: 31.4 t ADT: 40

SCOTTEN AVE

Good

Over: I-94

IN DETROIT, Wayne, MI

Built 1953 Load: 31.4 t ADT: 1,907

NAOMI ROAD

Good

Over: US-31

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

Built 2001 Load: 31.4 t ADT: 3,200

ESMOND RD

Good

Over: SMITH CREEK

1.5 MI E OF M-65, Iosco, MI

Built 2017 Load: 31.4 t ADT: 858

NELSON RD

Good

Over: BEAN CREEK

0.1 MI E OF CRAMER HWY, Lenawee, MI

Built 1990 Load: 31.5 t ADT: 185

HOLLAND LAKE ROAD

Good

Over: FISH CREEK

4 MI N M-57 0.1 M E MINER, Montcalm, MI

Built 1988 Load: 31.5 t ADT: 150

CARLETON RD

Good

Over: SOUTH BRANCH RAISIN RIVR

0.5 MI EAST OF WHIG HWY, Lenawee, MI

Built 1974 Load: 31.6 t ADT: 171

BEAVER ROAD

Good

Over: WALDO DRAIN

0.4 MI E ELEVEN MILE RD, Bay, MI

Built 1988 Load: 31.7 t ADT: 1,557

BURROUGHS ST

Good

Over: FLAT RIVER

0.25 MI E OF LINCOLN LK A, Kent, MI

Built 1995 Load: 31.7 t ADT: 965

HALLUMM

Good

Over: CREEK

4 MI NW OF MENDON, St. Joseph, MI

Built 1998 Load: 31.7 t ADT: 81

CAPITAL AVE

Good

Over: I-94

5.0 MI E OF KALAMAZOO COL, Calhoun, MI

Built 1959 Load: 31.8 t ADT: 29,500

KINSEL HWY

Good

Over: LITTLE THORNAPPLE RIVER

1 MI SE OF CHESTER, Eaton, MI

Built 1987 Load: 31.8 t ADT: 127

SUNFIELD HIGHWAY

Good

Over: LIBHART CREEK

2.5 MI S OF IONIA & 4MI E, Ionia, MI

Built 1986 Load: 31.8 t ADT: 134

MUIR ROAD

Good

Over: WESTON DRAIN

SEC. 6 ALMONT TWP., Lapeer, MI

Built 1983 Load: 31.8 t ADT: 270

THORNVILLE ROAD

Good

Over: SOUTH BR. FLINT RIVER

SEC. 18 DRYDEN TWP., Lapeer, MI

Built 1989 Load: 31.8 t ADT: 145

M-52

Good

Over: BLACK CREEK

0.5 MI S OF JASPER, Lenawee, MI

Built 1947 Load: 31.8 t ADT: 3,862

CANANDAIGUA ROAD

Good

Over: BEAN CREEK

0.10 MI E OF HARRIS HWY, Lenawee, MI

Built 1981 Load: 31.8 t ADT: 368

ALMY ROAD

Good

Over: FLAT RIVER

0.20 MI W OF SIX LAKES RD, Montcalm, MI

Built 1988 Load: 31.8 t ADT: 157

NB JOSLYN TO I-75

Good

Over: GTW RR

5.7 MI NW OF M-59, Oakland, MI

Built 1981 Load: 31.8 t ADT: 5,075

LAKE SHORE ROAD

Good

Over: PADDYS CREEK

0.5 MI E OF ONTONAGON, Ontonagon, MI

Built 1976 Load: 31.8 t ADT: 240

LAKEWOOD BLVD

Good

Over: PINE CREEK

0.75 MILES E OF 152ND AVE, Ottawa, MI

Built 1974 Load: 31.8 t ADT: 10,320

STANTON STREET

Good

Over: BASS CREEK

SECTION 5 BLENDON TWP, Ottawa, MI

Built 1975 Load: 31.8 t ADT: 100

WINAN ST

Good

Over: BASS CREEK

SECTION 25 ROBINSON TWP, Ottawa, MI

Built 1975 Load: 31.8 t ADT: 100

FRENCH LINE ROAD

Good

Over: DUFF DRAIN

SEC. 23-26 MARLETTE TWP., Sanilac, MI

Built 2001 Load: 31.8 t ADT: 435

US-24 SB

Good

Over: MIDDLE ROUGE R

IN DEARBORN HTS, Wayne, MI

Built 1959 Load: 31.8 t ADT: 27,634

M-102 WB

Good

Over: ROUGE RIVER

0.1 MI W OF US-24, Wayne, MI

Built 1987 Load: 31.8 t ADT: 25,704

JEFFERSON AVE

Good

Over: DEQUINDRE CUT GREENWAY

JEFFERSON W OF ST AUBIN, Wayne, MI

Built 1923 Load: 31.8 t ADT: 24,127

IRIS DRIVE

Good

Over: SUTHERLAND - OEMIG DRAIN

0.1 MI SE OF DONNER RD, Macomb, MI

Built 1999 Load: 31.8 t ADT: 250

HERMAN-NESTORIA RD

Good

Over: DAULTS CREEK

0.25 MI S OF HERMAN, Baraga, MI

Built 2006 Load: 32.0 t ADT: 37

PINCONNING ROAD

Good

Over: PINCONNING RIVER

1 MI E OF PINCONNING, Bay, MI

Built 1990 Load: 32.0 t ADT: 361

KIRBY AVENUE

Good

Over: GISS-I-WAS CREEK

REDDING TWP SEC 6, Clare, MI

Built 1988 Load: 32.0 t ADT: 160

CRONK ROAD

Good

Over: ST JOSEPH RIVER

0.3 MI S OF HERRING RD, Hillsdale, MI

Built 1987 Load: 32.0 t ADT: 130

9TH STREET

Good

Over: GUN RIVER

GUN PLAIN TWP SEC 17, Allegan, MI

Built 1982 Load: 32.1 t ADT: 268

TERRITORIAL ROAD

Good

Over: LAIRD CREEK

0.05 MI W OF GILBERT RD, Hillsdale, MI

Built 1983 Load: 32.1 t ADT: 1,030

MILLER ROAD

Good

Over: SILVER CREEK

0.4 MI W OF M-99, Hillsdale, MI

Built 1983 Load: 32.1 t ADT: 43

KINDE ROAD

Good

Over: WILLOW RIVER

SEC. 32 HURON TWP., Huron, MI

Built 1999 Load: 32.1 t ADT: 675

SORBY HWY

Good

Over: FITTS CREEK

0.1 MI N OF RAYMOND RD, Lenawee, MI

Built 1985 Load: 32.1 t ADT: 105

Showing 6,651-6,700 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.