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

WALTON ROAD

Good

Over: PONY CREEK

ROLLAND TWP SEC 3/10, Isabella, MI

Built 2002 Load: 32.7 t ADT: 199

HUBBARD LAKE TRAIL

Good

Over: LITTLE WOLF CREEK

MITCHELL TWP SEC 1 12, Alcona, MI

Built 2002 Load: 32.7 t ADT: 350

DRAKE ROAD

Good

Over: PEDESTRIAN WALKWAY

S OF PARKVIEW, Kalamazoo, MI

Built 2001 Load: 32.7 t ADT: 5,000

DORNOCH DRIVE

Good

Over: U OF M LAKE DRAIN

SCIO TWP SEC 27, Washtenaw, MI

Built 1990 Load: 32.7 t ADT: 1,003

MISSION ROAD

Good

Over: LITTLE SALT RIVER

LINCOLN TWP SEC 22-23, Isabella, MI

Built 2003 Load: 32.7 t ADT: 150

LEATON ROAD

Good

Over: MCDONALD DRAIN

WISE TWP SEC 19-20, Isabella, MI

Built 2003 Load: 32.7 t ADT: 500

LILLEY ROAD

Good

Over: WILLOW CREEK

NORTH OF FORD RD(M-153), Wayne, MI

Built 2007 Load: 32.7 t ADT: 14,472

MCKINLEY ROAD

Good

Over: CUSHMAN CREEK

500 EAST OF 200TH AVE, Oceana, MI

Built 2003 Load: 32.7 t ADT: 100

VANBORN ROAD

Good

Over: ECORSE RIVER

WEST OF INKSTER RD, Wayne, MI

Built 2000 Load: 32.7 t ADT: 20,000

COUNTY RD 98

Good

Over: HELMER CREEK

LAKEFIELD TWP SEC 20/29, Luce, MI

Built 2005 Load: 32.7 t ADT: 1,200

32ND STREET

Good

Over: KELLY LAKE DRAIN

PARK TWP SEC 33, Ottawa, MI

Built 2002 Load: 32.7 t ADT: 1,500

TIHART ROAD

Good

Over: MUD LAKE OUTLET DRAIN

MERIDIAN TWP SEC 15, Ingham, MI

Built 1999 Load: 32.7 t ADT: 560

BALDWIN ROAD

Good

Over: BEAR CREEK

WASHINGTON TWP SEC 3-4, Gratiot, MI

Built 2010 Load: 32.7 t ADT: 100

THREE MILE ROAD

Good

Over: MITCHELL CREEK

.07 MI S OF US-31, Grand Traverse, MI

Built 2006 Load: 32.7 t ADT: 24,586

S LOT ACCESS DRIVE

Good

Over: PARALLEL FRANK & POET DR

500 FT N OF EUREKA, Wayne, MI

Built 2001 Load: 32.7 t ADT: 6,153

COLEMAN ROAD

Good

Over: CURTIS DRAIN

WISE TWP SEC 22, Isabella, MI

Built 2005 Load: 32.7 t ADT: 828

WASSANOVA RD

Good

Over: LAUDENSCHLAGER DRAIN

0.1 MI N OF SIGLER RD, Monroe, MI

Built 1981 Load: 32.7 t ADT: 170

DEANS HILL ROAD

Good

Over: LOVE CREEK

0.5 NE OF OLD US-31, Berrien, MI

Built 2009 Load: 32.7 t ADT: 4,140

BURTON ROAD

Good

Over: MCKINZIE CREEK

HOWARD TWP SEC 7, Cass, MI

Built 1919 Load: 32.7 t ADT: 100

RIVERVIEW DRIVE

Good

Over: SILVER CREEK

GUN PLAIN TWP SEC 34&35, Allegan, MI

Built 2012 Load: 32.7 t ADT: 2,024

MONTE RD

Good

Over: FULLER DRAIN

0.4 MI N OF SUGARBUSH RD, Macomb, MI

Built 1998 Load: 32.7 t ADT: 1,510

SANTA ANITA DRIVE

Good

Over: FULLER DRAIN

0.4 MI N OF SUGARBUSH RD, Macomb, MI

Built 1998 Load: 32.7 t ADT: 200

30TH STREET

Good

Over: BASELINE CREEK

TROWBRIDGE TWP SEC 33 -34, Allegan, MI

Built 2009 Load: 32.7 t ADT: 115

STOUT ROAD

Good

Over: LOUD CREEK

0.5 MILE S OF M-72, Alcona, MI

Built 2010 Load: 32.7 t ADT: 175

DEER PATH TRAIL

Good

Over: PAINT CREEK DRAIN

IN SUBDIVISION SEC 33, Oakland, MI

Built 1999 Load: 32.7 t ADT: 500

OXBOW LAKE ROAD

Good

Over: CLINTON RIVER

SOUTH OF SCOUT TRAIL, Oakland, MI

Built 2007 Load: 32.7 t ADT: 4,540

PINE STREET

Good

Over: S BR BLACK RIVER

0.1 MI S OF MAIN STREET, Van Buren, MI

Built 2017 Load: 32.7 t ADT: 1,686

57TH STREET

Good

Over: SEVERENS DRAIN

0.5 MI N OF 120 AVE, Allegan, MI

Built 2013 Load: 32.7 t ADT: 2,985

DIVISION AVENUE

Good

Over: CRIPPEN DRAIN

380 FT N OF 60TH STREET, Kent, MI

Built 1966 Load: 32.7 t ADT: 18,600

DIVISION AVENUE

Good

Over: HEYBOER DRAIN

615 FT N OF 52ND STREET, Kent, MI

Built 1965 Load: 32.7 t ADT: 15,476

WIXOM RD

Good

Over: UNNAMED TRIB

500 FT S OF 11 MILE RD, Oakland, MI

Built 2012 Load: 32.7 t ADT: 2,500

ASHBURY DRIVE

Good

Over: TRIB TO MIDDLE ROUGE RIV

CHASE FARMS SUBDIVISION, Oakland, MI

Built 2000 Load: 32.7 t ADT: 180

ISLAND LAKE DRIVE

Good

Over: NOVI LYONS DRAIN

W END OF ISLAND LAKE, Oakland, MI

Built 1968 Load: 32.7 t ADT: 150

SHORELINE DRIVE

Good

Over: UNNAMED TRIBUTARY

AT END OF TIMBER TRAIL, Oakland, MI

Built 1968 Load: 32.7 t ADT: 100

RIDGE ROAD

Good

Over: FOWLER CREEK

SUPERIOR TWP SEC 36, Washtenaw, MI

Built 2013 Load: 32.7 t ADT: 150

11 MILE ROAD

Good

Over: LOWER KIESEL DRAIN

AT W RIVER ROAD, Bay, MI

Built 1980 Load: 32.7 t ADT: 50

FOUR MILE ROAD

Good

Over: KLAUSS CREEK

0.57 MI N OF DELTA ROAD, Bay, MI

Built 1980 Load: 32.7 t ADT: 50

TOWNLINE 16 ROAD

Good

Over: JOHNSON CREEK

0.26 MI W OF M-13, Bay, MI

Built 1972 Load: 32.7 t ADT: 50

KAISER ROAD

Good

Over: JOHNSON DRAIN

0.8 MI N OF ALMEDA BEACH, Bay, MI

Built 1970 Load: 32.7 t ADT: 50

TEN HILL ROAD

Good

Over: FRANKLIN SUBWATERSHD DRN

W BLOOMFIELD TWP SEC 36, Oakland, MI

Built 1975 Load: 32.7 t ADT: 50

JOHN BEERS RD

Good

Over: BIG MEADOW DRAIN

0.25 MI E OF HOLLYWOOD RD, Berrien, MI

Built 2001 Load: 32.7 t ADT: 4,700

BROUGHTON RD

Good

Over: MCBRIDE DRAIN

0.3 MI S OF 25 MILE RD, Macomb, MI

Built 2001 Load: 32.7 t ADT: 1,180

HAVERHILL DR

Good

Over: SALT SLING GLOEDE DRAIN

100 FT W OF GARFIELD RD, Macomb, MI

Built 2004 Load: 32.7 t ADT: 80

SPRUCE DR

Good

Over: TRIB TO HURON RIVER

2 MI NE OF WALLED LAKE, Oakland, MI

Built 1994 Load: 32.7 t ADT: 100

COOLEY ST

Good

Over: ARCADIA CREEK

BTWN ELEANOR & W WATER ST, Kalamazoo, MI

Built 1992 Load: 32.7 t ADT: 350

ROSE ST

Good

Over: ARCADIA CREEK

BTWN ELEANOR & W WATER ST, Kalamazoo, MI

Built 1992 Load: 32.7 t ADT: 7,600

MILLER RD

Good

Over: DAVIS CREEK

0.75 MI W OF SPRINKLE RD, Kalamazoo, MI

Built 1955 Load: 32.7 t ADT: 7,858

WOODCREEK DR

Good

Over: LITTLE PLASTER CREEK

270 FT W OF PATTERSON AVE, Kent, MI

Built 1994 Load: 32.7 t ADT: 100

COLEMAN RD

Good

Over: LOOMIS DRAIN

600 W OF LOOMIS RD, Isabella, MI

Built 2009 Load: 32.7 t ADT: 1,145

FISHING LOOP

Good

Over: E TO D SPILLWAY

SEC 30 T45N R13W, Schoolcraft, MI

Built 1954 Load: 32.7 t ADT: 50

Showing 6,951-7,000 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.