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

BLUE STAR MEM HWY

Fair

Over: ROGERS CREEK

1.1 MI N BERRIEN COUNTY, Van Buren, MI

Built 1931 Load: 99.9 t ADT: 2,472

BLUE STAR MEM HWY

Fair

Over: DEER LICK CREEK

1.25 MI S OF SOUTH HAVEN, Van Buren, MI

Built 1955 Load: 99.9 t ADT: 4,727

CEDAR LAKE ROAD

Fair

Over: W BR FISH CREEK

EVERGREEN TWP SEC 23, Montcalm, MI

Built 1970 Load: 99.9 t ADT: 84

YOUNGMAN ROAD

Fair

Over: WABASIS CREEK

EUREKA TWP SEC 29, Montcalm, MI

Built 1974 Load: 99.9 t ADT: 105

NORTH MARSHALL RD

Good

Over: SOUTH BR HOG CREEK

GIRARD TWP SEC 15-16, Branch, MI

Built 1968 ADT: 5,018

COUNTY PARK ROAD

Good

Over: SOUTH BR. PINE RIVER

SEC. 2 WALES TWP., St. Clair, MI

Built 1994 ADT: 937

NORTH SPRINKLE RD

Good

Over: SPRING BROOK

SEC 19 RICHLAND TWP, Kalamazoo, MI

Built 1998 ADT: 5,828

HAMILTON AVENUE

Good

Over: M-8 DAVISON FWY

HIGHLAND PARK E/LODGE FWY, Wayne, MI

Built 1996 Load: 3.6 t ADT: 26,400

IVA ROAD

Good

Over: WEEKS DRAIN

0.1 MI N OF DICE ROAD, Saginaw, MI

Built 1992 Load: 5.5 t ADT: 76

GANNON ROAD

Good

Over: CONWAY-COHOCTAH/SPRAGUE

SEC 15 COHOCTAH TWP, Livingston, MI

Built 1994 Load: 7.1 t ADT: 84

ERICKSON ROAD

Good

Over: TEBO DRAIN

300 FT W OF SEVEN MILE, Bay, MI

Built 2020 Load: 9.7 t ADT: 600

MWC ROAD

Good

Over: SCHWEITZERS CREEK

2.4 MI S OF PALMER, Marquette, MI

Built 1935 Load: 10.4 t ADT: 10

M-3 NB

Good

Over: CLINTON RIVER

IN MT CLEMENS, Macomb, MI

Built 2011 Load: 10.7 t ADT: 18,500

LEWIS AVE

Good

Over: LOCKWOOD DRAIN

2.75 MI N OF RAUCH RD, Monroe, MI

Built 2022 Load: 11.0 t ADT: 3,140

JOHNS BEERS ROAD

Good

Over: HICKORY CREEK

VILLAGE OF STEVENSVILLE, Berrien, MI

Built 1977 Load: 11.0 t ADT: 9,023

ST HELEN CONN RTE

Good

Over: DENTON CREEK

BACKUS TWP, Roscommon, MI

Built 2001 Load: 12.0 t ADT: 50

MAYFIELD ROAD

Good

Over: SOUTH BR. FLINT RIVER

SEC. 29 MAYFIELD TWP., Lapeer, MI

Built 1988 Load: 12.6 t ADT: 1,594

PIGEON RIVER ROAD

Good

Over: PIGEON RIVER

SEC.13/24 T34N R2W, Cheboygan, MI

Built 1995 Load: 13.6 t ADT: 620

AUTO TOUR ROUTE

Good

Over: C TO B SPILLWAY

SEC 29 T45N R13W, Schoolcraft, MI

Built 1953 Load: 13.6 t ADT: 120

PIERCE STOCKING DR

Good

Over: GREENAN ROAD

2.5 MILES FROM PARK ENTRA, Leelanau, MI

Built 1960 Load: 13.9 t ADT: 400

KROUSE RD

Good

Over: BEAR CREEK

3 MI SE OF OVID, Shiawassee, MI

Built 1994 Load: 14.3 t ADT: 189

FOREST ROAD 3340

Good

Over: TAMARACK RIVER

8 MI E OF WATERSMEET, Gogebic, MI

Built 1955 Load: 14.3 t ADT: 50

MUSKEGON ROAD

Good

Over: MUSKEGON RIVER

SEC 10 SUMMERFIELD TWP, Clare, MI

Built 2008 Load: 15.2 t ADT: 880

BLMFLD HILLS PKWY

Good

Over: ROUGE RIVER TRIB /S CULV

IN BLOOMFIELD HILLS, Oakland, MI

Built 1987 Load: 15.6 t ADT: 3,000

38TH STREET

Good

Over: LITTLE PORTAGE CREEK

2 MI W 1.8 MI S OF FULTON, Kalamazoo, MI

Built 1993 Load: 15.9 t ADT: 341

FOREST ROAD 3470

Good

Over: SOUTH BRANCH PAINT RIVER

1.5 MI NW OF BEECHWOOD, Iron, MI

Built 1952 Load: 15.9 t ADT: 50

EIGHTH STREET

Good

Over: OX CREEK

1 BLK S OF KLOCK RD, Berrien, MI

Built 2002 Load: 16.2 t ADT: 6,500

FOREST ROAD 2276

Good

Over: SILVER RIVER

6.5 MI S OF ALSTON, Houghton, MI

Built 1954 Load: 16.2 t ADT: 50

BAYPORT ROAD

Good

Over: SHEBEON DRAIN

SEC. 30 WINSOR TWP., Huron, MI

Built 1980 Load: 16.8 t ADT: 830

REED ROAD

Good

Over: NORTH BR CASS RIVER

SEC 13-24 ELKLAND TWP, Tuscola, MI

Built 2009 Load: 16.8 t ADT: 60

ELLISON ROAD

Good

Over: HOLMES & SPEARS DRAIN

0.25 MI W OF JOHNSON RD, Ionia, MI

Built 2014 Load: 16.8 t ADT: 250

WASHINGTON ST

Good

Over: CREPEAU CREEK

400 FT N OF GREEN STREET, Macomb, MI

Built 1968 Load: 17.2 t ADT: 9,770

HALL ROAD

Good

Over: POTTS DRAIN

SEC 17-20 BUEL TWP, Sanilac, MI

Built 1980 Load: 17.2 t ADT: 135

AUTO TOUR ROUTE

Good

Over: E TO C SPILLWAY

SEC 20 T45N R13W, Schoolcraft, MI

Built 1952 Load: 17.2 t ADT: 90

HOADLEY ROAD

Good

Over: WHITE CREEK I /C DRAIN

SEC 16-17 LAMOTTE TWP, Sanilac, MI

Built 1978 Load: 17.8 t ADT: 165

STEEL ROAD

Good

Over: LAMB CREEK

1.3 MI N OF KRAMER ROAD, Saginaw, MI

Built 1978 Load: 18.1 t ADT: 46

STAPLETON ROAD

Good

Over: UNNAMED CREEK

SEC. 31 KENOCKEE TWP., St. Clair, MI

Built 2013 Load: 18.1 t ADT: 174

BIVENS RD

Good

Over: QUAKER BROOK

0.37 MI E OF M-66, Barry, MI

Built 1970 Load: 18.1 t ADT: 82

LLL ROAD

Good

Over: TROUT FALLS CREEK

1.3 MI N OF SO REPUBLIC, Marquette, MI

Built 1935 Load: 18.2 t ADT: 30

TOWNSEND PARK DRV

Good

Over: BEAR CREEK

160 FT E OF RAMSDELL DRV, Kent, MI

Built 1927 Load: 19.0 t ADT: 150

TOWNSEND PARK DRV

Good

Over: BEAR CREEK

EASTERLY END OF DRIVE, Kent, MI

Built 1927 Load: 19.0 t ADT: 150

JOHN HIX ROAD

Good

Over: LOWER ROUGE RIVER

IN CITY OF WAYNE, Wayne, MI

Built 1989 Load: 19.1 t ADT: 3,050

MILHAM AVE

Good

Over: PORTAGE CREEK

SEC 3-10 PORTAGE TWP, Kalamazoo, MI

Built 1990 Load: 19.3 t ADT: 13,142

44 TH STREET

Good

Over: AUGUSTA CREEK TRIBU

ROSS TWP SEC 3, Kalamazoo, MI

Built 2007 Load: 19.3 t ADT: 391

ROUTE 388

Good

Over: CANADIAN NATIONAL RR

CITY OF POWERS, Menominee, MI

Built 1986 Load: 19.4 t ADT: 170

ALLEN DRIVE

Good

Over: BARNARD DRAIN

0.2 MI S OF MAPLE ROAD, Oakland, MI

Built 1969 Load: 19.4 t ADT: 2,300

BARD ROAD

Good

Over: MIDDLE BR TOBACCO RIVER

1700 FT. S. CALHOUN ROAD, Gladwin, MI

Built 1991 Load: 19.6 t ADT: 1,375

HOCKADAY RD

Good

Over: SUGAR RIVER

8.8MI N OF M61, Gladwin, MI

Built 1997 Load: 19.6 t ADT: 1,083

SWINSON NEUMAN RD

Good

Over: WATSON DRAIN

10 RODS E OF RHODES RD, Gladwin, MI

Built 1994 Load: 19.6 t ADT: 252

RHODES RD

Good

Over: WATSON DRAIN

15 RODS N OF SWINSON RD, Gladwin, MI

Built 1986 Load: 19.6 t ADT: 247

Showing 6,251-6,300 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.