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

PONTIAC LAKE ROAD

Poor

Over: CLINTON RIVER

WATERFORD TWP SEC 21, Oakland, MI

Built 1985 Load: 7.8 t ADT: 8,800

FARR STREET

Poor

Over: HURON RIVER

COMMERCE TWP SEC 10, Oakland, MI

Built 1970 Load: 7.8 t ADT: 500

220TH AVENUE

Poor

Over: PARIS CREEK

600 FT S OF 22 MILE ROAD, Mecosta, MI

Built 2011 Load: 7.8 t ADT: 100

MACKINAW ROAD

Poor

Over: KAWKAWLIN RIVER

0.6 MI N OF N UNION RD, Bay, MI

Built 1960 Load: 8.1 t ADT: 1,799

LAKESIDE ROAD

Poor

Over: S BRANCH GALIEN RIVER

3 MI E OF NEW BUFFALO, Berrien, MI

Built 1961 Load: 8.1 t ADT: 80

LOG ROAD

Poor

Over: SOUTH BR SWAN CREEK

BETHEL TWP SEC 8, Branch, MI

Built 1982 Load: 8.1 t ADT: 110

OLD-27

Poor

Over: ST JOSEPH RIVER

TEKSHONA TWP SEC 27, Calhoun, MI

Built 1930 Load: 8.1 t ADT: 2,524

SMALL ACRES LANE

Poor

Over: PINE LAKE OUTLET DRAIN

1.3 MI NW OF OKEMOS, Ingham, MI

Built 1925 Load: 8.1 t ADT: 10

TWELVE MILE

Poor

Over: NOVI-LYON DRAIN

EAST OF MARTINDALE, Oakland, MI

Built 1961 Load: 8.1 t ADT: 300

ROSBOLT RD

Poor

Over: PAINT CREEK

AUGUSTA TWP SEC 15, Washtenaw, MI

Built 1928 Load: 8.1 t ADT: 69

GALLUP PARK ROAD

Poor

Over: HURON RIVER

GALLUP PARK, Washtenaw, MI

Built 1976 Load: 8.1 t

CHICAGON MINE RD

Poor

Over: CHICAGON CREEK

1.0 MI WEST USH 2, Iron, MI

Built 1900 Load: 8.2 t ADT: 142

HORSE ISLAND DRIVE

Poor

Over: HORSE ISL & ADAMS DR BYU

EAST OF ADAMS, Wayne, MI

Built 1925 Load: 8.2 t ADT: 350

DEGROOT RD

Poor

Over: N BR FORD RIVER

0.5 MI N OF TURNER RD, Dickinson, MI

Built 2008 Load: 8.2 t ADT: 10

SQUIRES ROAD

Poor

Over: SOAP CREEK

0.1 MI N OF STERLING RD, Hillsdale, MI

Built 1960 Load: 8.7 t ADT: 96

SCHOCK ROAD

Poor

Over: SUCKER CREEK

SEC. 23-24 SHERMAN TWP., Huron, MI

Built 1985 Load: 8.7 t ADT: 400

SQUAW CREEK ROAD

Poor

Over: SQUAW CREEK DRAIN

SEC. 34 RICH TWP., Lapeer, MI

Built 1968 Load: 8.7 t ADT: 70

17 MILE ROAD

Poor

Over: PLUMBROOK DRAIN

EAST OF VAN DYKE (M53), Macomb, MI

Built 1984 Load: 8.7 t ADT: 13,790

CHESTERFIELD RD

Poor

Over: QUARTON BR/ROUGE RIVER

IN BLOOMFIELD HILLS, Oakland, MI

Built 1979 Load: 8.7 t ADT: 1,000

SPILE DAM RD

Poor

Over: OCQUEOC RIVER

N OF CR 634, Presque Isle, MI

Built 1930 Load: 8.7 t ADT: 100

47TH STREET

Poor

Over: S BR MACATAWA RIVER

OVERISEL TWP SEC 6, Allegan, MI

Built 1926 Load: 9.0 t ADT: 36

BLACK ROAD

Poor

Over: BIG CREEK A DRAIN

0.6 MI S OF TWINING RD, Arenac, MI

Built 1917 Load: 9.1 t ADT: 30

REYNOLDS ROAD

Poor

Over: BETSIE RIVER

3.5M N 3M E OF THMPSNVLLE, Benzie, MI

Built 1906 Load: 9.1 t ADT: 54

ADAMS ROAD

Poor

Over: BUSH CREEK DRAIN

SEC 2-11 BETHANY TWP, Gratiot, MI

Built 1930 Load: 9.1 t ADT: 88

MCKILLOP ROAD

Poor

Over: INDIAN CREEK DRAIN

SEC 19 BURLINGTON TWP, Lapeer, MI

Built 1976 Load: 9.1 t ADT: 56

INWOOD ROAD

Poor

Over: STONY CREEK

0.6 MI EAST OF MT VERNON, Macomb, MI

Built 1960 Load: 9.1 t ADT: 110

BENNINGTON ROAD

Poor

Over: BEAR CREEK

4 MILES NE OF LAINGSBURG, Shiawassee, MI

Built 1925 Load: 9.1 t ADT: 1,026

KITCHEN ROAD

Poor

Over: UNNAMED CREEK

SEC. 1-12 WALES TWP., St. Clair, MI

Built 1982 Load: 9.1 t ADT: 150

FRASER ROAD

Poor

Over: PINCONNING RIVER

1000 FT N OF NEUMAN RD, Bay, MI

Built 1935 Load: 9.4 t ADT: 393

WESTERN ROAD

Poor

Over: KEARSLEY CREEK

IN CITY OF FLINT, Genesee, MI

Built 1928 Load: 9.4 t ADT: 4,195

QUEENS HIGHWAY

Poor

Over: M BR PERE MARQUETTE RIV

3 MI S 0.5 M E OF NIRVANA, Lake, MI

Built 1904 Load: 9.4 t ADT: 180

W SUGNET ROAD

Poor

Over: STURGEON CREEK

IN CITY OF MIDLAND, Midland, MI

Built 1968 Load: 9.4 t ADT: 5,300

YAW STREET

Poor

Over: DOWAGIAC RIVER

1 MI N OF M-62, Cass, MI

Built 1930 Load: 9.7 t ADT: 26

MOSHERVILLE ROAD

Poor

Over: S BR KALAMAZOO RIVER

0.1 MI E OF BORDEN ROAD, Hillsdale, MI

Built 1947 Load: 9.7 t ADT: 506

BROADBRIDGE ROAD

Poor

Over: MARINE CITY DREDGE CUT

PC 191-318 COTTRELLVILLE, St. Clair, MI

Built 1986 Load: 9.7 t ADT: 1,100

BUSH ROAD

Poor

Over: LETTS CREEK

SLVAN TWP SEC 2, Washtenaw, MI

Built 1968 Load: 9.7 t ADT: 200

OLD M-61

Poor

Over: MIDDLE BRANCH RIVER

0.1 MI E OF M-66, Osceola, MI

Built 1939 Load: 9.8 t ADT: 3,600

CENTRAL ROAD

Poor

Over: COLD WATER RIVER

OVID TWP SEC 9-16, Branch, MI

Built 1961 Load: 10.0 t ADT: 532

HUCKLEBERRY ROAD

Poor

Over: CARP RIVER

1.5 MI S OF TROUT LAKE, Chippewa, MI

Built 1965 Load: 10.0 t ADT: 22

LAKE ROAD

Poor

Over: PINE RUN

1000 FT WEST OF WEBSTER, Genesee, MI

Built 1938 Load: 10.0 t ADT: 596

DIMMERS ROAD

Poor

Over: E FORK W BR ST JOSEPH RV

0.3 MILE W OF HILLSDALE, Hillsdale, MI

Built 1970 Load: 10.0 t ADT: 141

PEACOCK ROAD

Poor

Over: LITTLE MANISTEE RIVER

2 MI E 5 MI S OF IRONS, Lake, MI

Built 1929 Load: 10.0 t ADT: 30

RAAP ROAD

Poor

Over: FISHER LAKE OUTLET

0.1 MI E OF FISHER ROAD, Macomb, MI

Built 1982 Load: 10.0 t ADT: 50

LEFFEW ROAD

Poor

Over: BIG BEAR CREEK

5 MI SW OF COPEMISH, Manistee, MI

Built 1910 Load: 10.0 t ADT: 10

SCHUBERT HIGHWAY

Poor

Over: MONAGHAN CREEK

SEC 23 T33N R7E, Presque Isle, MI

Built 1960 Load: 10.0 t ADT: 302

BRENNAN ROAD

Poor

Over: SOUTH BRANCH BAD RIVER

0.9 MI N OF BURT ROAD, Saginaw, MI

Built 1898 Load: 10.0 t ADT: 99

LASHBROOK ROAD

Poor

Over: UNNAMED CREEK

SEC 23 WALES TWP, St. Clair, MI

Built 1979 Load: 10.0 t ADT: 105

ORCHARD HILL ROAD

Poor

Over: HOG ISLAND CREEK

1.9 M N OF US-2, Mackinac, MI

Built 1997 Load: 10.2 t ADT: 10

HURBERT ROAD

Poor

Over: THUNDER BAY RIVER

1 MI N 6.5 MI W OF SPRUCE, Alcona, MI

Built 1955 Load: 10.4 t ADT: 1,730

MAPLE AVE

Poor

Over: SWARTZ CREEK

BET LINDEN & JENNINGS RD, Genesee, MI

Built 1937 Load: 10.4 t ADT: 2,051

Showing 10,201-10,250 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.