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

TS AVENUE

Poor

Over: PORTAGE RIVER

0.3 MI N OF INDIAN LAKE, Kalamazoo, MI

Built 1933 Load: 0.0 t ADT: 82

40TH STREET

Poor

Over: LITTLE PORTAGE CREEK

0.8 MI S 1 MI W OF FULTON, Kalamazoo, MI

Built 1912 Load: 0.0 t ADT: 72

MULBERRY ROAD

Poor

Over: BEAN CREEK

0.2 MI W OF M-156, Lenawee, MI

Built 1952 Load: 0.0 t ADT: 130

MULBERRY ROAD

Poor

Over: NILE CREEK

0.75 MI EAST OF M-52, Lenawee, MI

Built 1974 Load: 0.0 t ADT: 34

TOWNLINE HWY

Poor

Over: WOLF CREEK

0.1 MI N OF SHEPHERD RD, Lenawee, MI

Built 1976 Load: 0.0 t ADT: 181

COHOCTAH ROAD

Poor

Over: COHOCTAH-DEERFIELD DRAIN

SEC 6 DEERFIELD TWP, Livingston, MI

Built 1955 Load: 0.0 t ADT: 2,156

SOUTH RIVER RD

Poor

Over: CHANNEL BETW LAKE & RIVR

0.3 MI E OF LAKE SHORE DR, Macomb, MI

Built 1974 Load: 0.0 t ADT: 6,400

DAY ROAD

Poor

Over: SALINE RIVER

0.5 MI E OF BUNCE ROAD, Monroe, MI

Built 1937 Load: 0.0 t ADT: 16

N COUNTY LINE ROAD

Poor

Over: NORTH MACON CREEK

0.13 MI N OF RIDGE ROAD, Monroe, MI

Built 1910 Load: 0.0 t ADT: 30

MARTIN LUTHER KING

Poor

Over: GRAND TRUNK WESTERN RR

1/4 MI E EAST BLVD & BL75, Oakland, MI

Built 1976 Load: 0.0 t ADT: 8,700

GROVE ST

Poor

Over: DEER CREEK

COOPERSVILLE, Ottawa, MI

Built 1970 Load: 0.0 t ADT: 1,190

BUECHE ROAD

Poor

Over: PATTIECREEK

0.5 MI N OF FRY ROAD, Saginaw, MI

Built 1959 Load: 0.0 t ADT: 44

ROTUNDA DRIVE

Poor

Over: OPEN AREA

DEARBORN S / MICHIGAN AVE, Wayne, MI

Built 1931 Load: 0.0 t ADT: 8,816

MILLER ROAD

Poor

Over: CONRAIL

DEARBORN S/MICHIGAN, Wayne, MI

Built 1931 Load: 0.0 t ADT: 23,965

M-89 (WASHINGTON)

Poor

Over: BATTLE CREEK RIVER

0.2 MI N OF I-94 BL, Calhoun, MI

Built 1982 Load: 0.3 t ADT: 11,004

ALBION ROAD

Poor

Over: N BRANCH KALAMAZOO RIVER

2 MI N OF CONCORD, Jackson, MI

Built 1929 Load: 0.3 t ADT: 1,140

STEVENSON ROAD

Poor

Over: S BR PINE RIVER

0.5 MI W OF NINE MILE RD, Bay, MI

Built 1970 Load: 0.3 t ADT: 150

ERICKSON ROAD

Poor

Over: N BR KAWKAWLIN RIVER

3 MI N 3.5 MI W OF CRUMP, Bay, MI

Built 1942 Load: 1.7 t ADT: 172

KIVAMAKI ROAD

Poor

Over: WHITEFISH RIVER

5.7 MI WSW OF TRAUNIK, Alger, MI

Built 1910 Load: 2.0 t ADT: 5

BORDMAN ROAD

Poor

Over: NEWLAND DRAIN

SEC 5 ARMADA TWP, Macomb, MI

Built 1978 Load: 2.0 t ADT: 180

BAILEY ROAD

Poor

Over: PIPESTONE CREEK

5.5 MI E OF SODUS, Berrien, MI

Built 1924 Load: 2.3 t ADT: 4

E ELM STREET

Poor

Over: RED CEDAR RIVER

IN THE CITY OF LANSING, Ingham, MI

Built 1980 Load: 2.3 t ADT: 2,000

GREEN AVE

Poor

Over: BEAVER CREEK

2 MI E OF VOLNEY, Newaygo, MI

Built 1925 Load: 2.3 t ADT: 50

N ALBION STREET

Poor

Over: KALAMAZOO RIVER

6 BLOCKS WEST OF M-99, Calhoun, MI

Built 1935 Load: 2.6 t ADT: 1,697

GRESHAM HWY

Poor

Over: THORNAPPLE RIVER

3 MI E OF VERMONTVILLE, Eaton, MI

Built 1953 Load: 2.6 t ADT: 77

TRIST ROAD

Poor

Over: PORTAGE RIVER S BR

0.5 MI S 3 M W WATERLOO, Jackson, MI

Built 1939 Load: 2.6 t ADT: 624

SCHULTZ RD

Poor

Over: WHITMORE DRAIN

0.1 MI N OF PANGBORN ROAD, Saginaw, MI

Built 1910 Load: 2.6 t ADT: 10

OTTAWA ST

Poor

Over: MUSKEGON RIVER S BRANCH

0.25 MI N OF BAYOU ST, Muskegon, MI

Built 1929 Load: 2.7 t ADT: 599

88TH AVENUE

Poor

Over: N BR PENTWATER RIVER

0.5 MI N OF JEFFERSON RD, Oceana, MI

Built 1912 Load: 2.7 t ADT: 20

HOG CREEK ROAD

Poor

Over: LITTLE HOG CREEK

0.1 MI N OF WATKINS RD, Hillsdale, MI

Built 1925 Load: 2.9 t ADT: 84

130TH AVE

Poor

Over: LITTLE MUSKEGON RIVER

2.5 MI N OF S COUNTY LINE, Mecosta, MI

Built 1958 Load: 2.9 t ADT: 354

NO 19 ROAD

Poor

Over: MANISTEE RIVER

SECTION 28 T24N R11W, Wexford, MI

Built 1906 Load: 2.9 t ADT: 106

KAISER-TOWER ROAD

Poor

Over: FRASER-GARFIELD DRAIN

0.3 MI S OF PREVO RD, Bay, MI

Built 1936 Load: 3.2 t ADT: 486

PARKE LANE ROAD

Poor

Over: THOROFARE CH(GROSSE ILE)

GROSSE ILETWP S/BRIDGE ST, Wayne, MI

Built 1930 Load: 3.2 t ADT: 1,365

SCHOW ROAD

Poor

Over: SKEELS CREEK

0.05 MI S OF MEINERT RD, Muskegon, MI

Built 1939 Load: 3.5 t ADT: 74

AVALON ROAD

Poor

Over: PRIVATE CHANNEL

200 FT N OF RASHOTT RD, Bay, MI

Built 1955 Load: 3.6 t ADT: 122

IRON BRIDGE ROAD

Poor

Over: STURGEON RIVER

10 MI EAST OF BOYNE FALLS, Charlevoix, MI

Built 1900 Load: 3.6 t ADT: 3

FRANCES ROAD

Poor

Over: BUTTERNUT CREEK

BET GENESEE & VASSER ROAD, Genesee, MI

Built 1937 Load: 3.6 t ADT: 643

ELM ROAD

Poor

Over: MALLORY LAKE DRAIN

0.1 MILE N OF EGYPT ROAD, Hillsdale, MI

Built 1910 Load: 3.6 t ADT: 46

BELL ROAD

Poor

Over: DUCK CREEK

1.25 MI W 3.5 MI S CLARKS, Ionia, MI

Built 1970 Load: 3.6 t ADT: 40

CASTLE ROAD

Poor

Over: NORTH BR. FLINT RIVER

SEC. 34 RICH TWP., Lapeer, MI

Built 1940 Load: 3.6 t ADT: 210

10 MILE RD

Poor

Over: BEAVER CREEK

3 MILES EAST OF VOLNEY, Newaygo, MI

Built 1925 Load: 3.6 t ADT: 100

MILLER ROAD

Poor

Over: CISCO BR ONTONAGON RIVER

SEC 15 WATERSMEET TWP, Gogebic, MI

Built 1920 Load: 3.9 t ADT: 11

INDEX ROAD

Poor

Over: SOUTH BR. CASS RIVER DN.

SEC. 23-26 BURNSIDE TWP., Lapeer, MI

Built 1965 Load: 3.9 t ADT: 90

GOSLINE ROAD

Poor

Over: SOUTH BR. CASS RIVER DN.

SEC. 23-24 BURNSIDE TWP., Lapeer, MI

Built 1965 Load: 3.9 t ADT: 214

CLOTHIER ROAD

Poor

Over: WHITE CREEK DRAIN #2

SEC 14-15 KOYLTON TWP, Tuscola, MI

Built 1978 Load: 3.9 t ADT: 215

PATTERSON PARK RD

Poor

Over: RIO GRANDE CREEK

0.1 MI W OF BLACKMERE RD, Muskegon, MI

Built 1932 Load: 4.1 t ADT: 50

NORTH ROAD

Poor

Over: SHIAWASSEE RIVER

NORTHOFUS-23RAMP, Genesee, MI

Built 1928 Load: 4.2 t ADT: 5,647

PATTERSON PARK RD

Poor

Over: RIO GRANDE CREEK

0.2 MI W OF BLACKMERE RD, Muskegon, MI

Built 1932 Load: 4.2 t ADT: 50

SILVER CREEK ROAD

Poor

Over: SILVER CREEK

COLUMBUS TWP SEC 12, Luce, MI

Built 1970 Load: 4.2 t ADT: 5

Showing 10,101-10,150 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.