State profile · Below median Poor share

Maryland 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 Maryland.

5,484
Public bridges
32.3%
Good condition
4.6%
Poor condition

Maryland holds 5,484 public highway bridges (#34 of 52 by inventory) with a 4.56% Poor share (#38 of 52 by Poor share).

That is 4.6% 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 15 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

5,484

Public highway bridges in Maryland

Good Condition

32.3%

1,771 bridges rated 7-9

-17.7pp vs 50% benchmark

Poor Condition

4.6%

250 bridges whose lowest applicable component is rated 0-4

-3.0pp vs national avg 7.5%

Maryland vs national bridge condition

Maryland - Good condition share 32.3%
National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

Maryland - Poor-condition share 15.2%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.5%.

Maryland 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: Maryland has 5,484 bridges and a 4.6% Poor-condition share in the 2024 NBI, rank #15 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 (%) MD, Public bridges in inventory (thousands): 5.5k · Poor-condition share (%): 4.56%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%MA, Public bridges in inventory (thousands): 5.3k · Poor-condition share (%): 8.88%MI, Public bridges in inventory (thousands): 11.4k · Poor-condition share (%): 11.27%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: Maryland has 5,484 bridges and a 4.6% Poor-condition share in the 2024 NBI, rank #15 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.

Maryland 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

5,484 34th of 54 higher than 20 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 Maryland

The highlighted point is Maryland: 5,484 bridges and 4.56% in Poor condition, rank #15 of 54 jurisdictions ordered from the lowest share upward. The five jurisdictions immediately above and below Maryland on that same Poor-share ordering:

  • Minnesota: 13,532 bridges · 4.44% Poor
  • New Mexico: 4,035 bridges · 4.51% Poor
  • Maryland: 5,484 bridges · 4.56% Poor
  • Oregon: 8,305 bridges · 4.61% Poor
  • Connecticut: 4,365 bridges · 4.72% Poor

The full national sortable table lives on the rankings page.

Material families in Maryland

Exclusive FHWA material families across all 5,484 bridges in this state; continuous variants fold into the parent family. Orthogonal to the Poor-share scatter above.

Who maintains Maryland’s inventory

State agency holds 53.4% of the 5,484 public highway bridges filed under Maryland in the 2024 NBI, the agency-of-record split for this state, not a condition verdict.

When Maryland’s bridges were built

Pre-1950 construction accounts for 15.9% of the 5,484 bridges with a recorded original year in Maryland. Era bands are orthogonal to the Poor-share ranking above.

Condition Distribution

Maryland32.3%63.1%GoodFairPoor
Bridge inventory deck-condition mix - Maryland (FHWA NBI)

Maryland 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 Maryland on the same metric.

MN

Minnesota

4.44% top marginal rate
Structure
Progressive
Burden @ $100K
$13,532

NM

New Mexico

4.51% top marginal rate
Structure
Progressive
Burden @ $100K
$4,035
Selected

MD

Maryland

4.56% top marginal rate
Structure
Progressive
Burden @ $100K
$5,484

OR

Oregon

4.61% top marginal rate
Structure
Progressive
Burden @ $100K
$8,305

CT

Connecticut

4.72% top marginal rate
Structure
Progressive
Burden @ $100K
$4,365

Bridges Needing Most Attention in Maryland

Six lowest-condition bridges in Maryland, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.

All Bridges in Maryland

MD 908D

Fair

Over: US 50/US 301

0.24 MI S OF OCEANIC DR, Anne Arundel, MD

Built 1974 Load: 24.9 t ADT: 1,911

MD 578

Fair

Over: HOG CREEK

2.06 MILE EAST OF MD 331, Caroline, MD

Built 1941 Load: 24.9 t ADT: 2,672

MD 316

Fair

Over: BR OF BIG ELK CREEK

0.24 MILE NORTH OF MD 279, Cecil, MD

Built 1931 Load: 24.9 t ADT: 4,331

MD 550

Fair

Over: DORCUS BRANCH

0.74 MILE SOUTH OF MD 194, Frederick, MD

Built 1925 Load: 24.9 t ADT: 3,541

US 340

Fair

Over: CATOCTIN CREEK

0.63 MILE EAST OF MD 180, Frederick, MD

Built 1961 Load: 24.9 t ADT: 28,982

MD 18B

Fair

Over: KENT ISLAND NARROWS

0.59 MILE WEST OF MD 835, Queen Anne's, MD

Built 1951 Load: 24.9 t ADT: 2,123

FALLS ROAD

Fair

Over: CHARLES RUN

0.1 MI S MONKTON RD, Baltimore, MD

Built 1988 Load: 24.9 t ADT: 1,200

BLUE MOUNT ROAD

Fair

Over: GUNPOWDER FALLS

1.3 MI E OF MONKTON RD, Baltimore, MD

Built 1989 Load: 24.9 t ADT: 360

HUNTER MILL ROAD

Fair

Over: FIRST MINE BRANCH

0.4 MI NE OF BACON RD, Baltimore, MD

Built 1988 Load: 24.9 t ADT: 392

COCKEYSVILLE ROAD

Fair

Over: PARKS RUN

0.17 MI W OF MD 45, Baltimore, MD

Built 1949 Load: 24.9 t ADT: 3,390

TENBURY ROAD

Fair

Over: LONG QUARTER BRANCH

100 FEET W OF MEADOWVALE, Baltimore, MD

Built 1955 Load: 24.9 t ADT: 553

RIDGEFIELD ROAD

Fair

Over: LONG QUARTER BRANCH

0.30 MI E OF MD 45, Baltimore, MD

Built 1955 Load: 24.9 t ADT: 715

CAVES ROAD

Fair

Over: NORTH BRANCH JONES FALLS

0.12 MI SW OF MD 129, Baltimore, MD

Built 1910 Load: 24.9 t ADT: 3,208

HOWARD STREET

Fair

Over: I-83 CSX MTA AMTRAK

0.2 MI N MOUNT ROYAL AVE, Baltimore city, MD

Built 1938 Load: 24.9 t ADT: 27,982

DRAWBRIDGE ROAD

Fair

Over: CHICAMACOMICO RIVER

0.22 MI. N. OF GRIF NCK R, Dorchester, MD

Built 1972 Load: 24.9 t ADT: 197

OAK FARM ROAD

Fair

Over: MILL BROOK

0.4 MIL E OF GLENVILLE RD, Harford, MD

Built 1988 Load: 24.9 t ADT: 102

VOLLMERHAUSEN ROAD

Fair

Over: LITTLE PATUXENT RIVER

0.2 MI W OF GUILFORD RD, Howard, MD

Built 1940 Load: 24.9 t ADT: 3,290

EAST DEER PARK DRI

Fair

Over: CSXT RAILROAD

0.6 MILES EAST OF MD 355, Montgomery, MD

Built 1945 Load: 24.9 t ADT: 7,121

WARREN ROAD

Fair

Over: CAMPBELL DITCH

0.75 MI E SIXTY FOOT RD, Wicomico, MD

Built 1939 Load: 24.9 t ADT: 114

MD RT 213

Fair

Over: C&D CANAL

14 MI WEST OF REEDY PT., Cecil, MD

Built 1948 Load: 24.9 t ADT: 13,615

MD 636

Fair

Over: WARRIOR RUN

0.27 MI E OF MD 53, Allegany, MD

Built 1936 Load: 25.4 t ADT: 8,071

MD 658

Fair

Over: BRADDOCK RUN

0.11 MI N OF US 48, Allegany, MD

Built 1968 Load: 25.4 t ADT: 11,250

MD 315

Fair

Over: MARSHYHOPE CREEK

1.11 MILE EAST OF MD 313, Caroline, MD

Built 1910 Load: 25.4 t ADT: 5,080

MD 86

Fair

Over: BR OF GUNPOWDER FALLS

1.74 MI S OF PA LINE, Carroll, MD

Built 1972 Load: 25.4 t ADT: 3,442

RIDGE ROAD

Fair

Over: IS 70

1.57 MI W OF US 40, Frederick, MD

Built 1972 Load: 25.4 t ADT: 1,342

MD 210

Fair

Over: HENSON CREEK

0.08 M N OF PALMER ROAD, Prince George's, MD

Built 1945 Load: 25.4 t ADT: 65,100

IS 95NB CD RD & RP

Fair

Over: LITTLE PAINT BRANCH

.24 MILES SOUTH OF MD 212, Prince George's, MD

Built 1971 Load: 25.4 t ADT: 187,850

BROOKLYN BRIDGE RD

Fair

Over: IS 95

1.07 MI N OF MD 198, Prince George's, MD

Built 1971 Load: 25.4 t ADT: 4,360

MD 12

Fair

Over: POCOMOKE RIVER

1.06 MILES S OF MD 354, Worcester, MD

Built 1932 Load: 25.4 t ADT: 5,865

WISE AVENUE

Fair

Over: BEAR CREEK

0.9 MI W OF NORTH PT RD, Baltimore, MD

Built 1948 Load: 25.4 t ADT: 14,960

DUTTON AVENUE AND

Fair

Over: TRIBUTARY TO PATAPSCO RI

200 S. OF EDMONDSON AVE., Baltimore, MD

Built 1979 Load: 25.4 t ADT: 6,048

I-83 SB

Fair

Over: GAY STREET

0.2 MI S OF ORLEANS ST, Baltimore city, MD

Built 1975 Load: 25.4 t ADT: 80,130

OLD YORK ROAD

Fair

Over: LITTLE GUNPOWDER FALLS

ON BALT CO LINE, Harford, MD

Built 1955 Load: 25.4 t ADT: 245

CARROLL MILL ROAD

Fair

Over: BENSON BRANCH

0.4 MI W MT ALBERT ROAD, Howard, MD

Built 1960 Load: 25.4 t ADT: 577

RIVER ROAD

Fair

Over: BROAD RUN

0.3 MI E OF ELMER SCHOOL, Montgomery, MD

Built 1911 Load: 25.4 t ADT: 444

ROWE ROAD

Fair

Over: LITTLE ANTIETAM CREEK

0.13 MI SW OF MD RTE 64, Washington, MD

Built 1974 Load: 25.4 t ADT: 934

MEMORIAL PLAZA DRI

Fair

Over: BEAVERDAM CREEK

1 MI SW GLEN AVENUE, Wicomico, MD

Built 1991 Load: 25.4 t ADT: 3,163

PORTERS CROSSING R

Fair

Over: POCOMOKE RIVER

0.95 MI E OF MD 354, Worcester, MD

Built 1990 Load: 25.4 t ADT: 260

IS 95 VIADUCT NB

Fair

Over: S PONCA ST I 895

Milepost M57.0, Baltimore city, MD

Built 1980 Load: 25.4 t ADT: 64,313

GREENBELT METRO DR

Fair

Over: I-495

0.2 MI. W. OF CHERRYWOOD, Prince George's, MD

Built 1989 Load: 25.4 t ADT: 3,326

MAIN ST (MD 937)

Fair

Over: BRANCH OF GEORGES CREEK

0.36 MI N OF W VA LINE, Allegany, MD

Built 1933 Load: 25.8 t ADT: 3,555

MD 742

Fair

Over: YOUGHIOGHENY RIVER

0.48 MILE NORTH OF MD 42, Garrett, MD

Built 1932 Load: 25.8 t ADT: 1,184

US 1

Fair

Over: SUSQUEHANNA RIVER

ON CECIL CO LINE, Harford, MD

Built 1927 Load: 25.8 t ADT: 14,243

MD 175

Fair

Over: PEDESTRIAN WALKWAY

0.69 MILE SOUTH OF US 29, Howard, MD

Built 1975 Load: 25.8 t ADT: 44,142

MD 290

Fair

Over: CHESTER RIVER

ON QUEEN ANNES CO LINE, Kent, MD

Built 1951 Load: 25.8 t ADT: 2,011

IS 95 IL

Fair

Over: SOUTHWEST BRANCH

0.25 MILE SOUTH OF MD 214, Prince George's, MD

Built 1964 Load: 25.8 t ADT: 102,413

US 40

Fair

Over: IS 70

0.03 MI W OF FREDERICK CO, Washington, MD

Built 1968 Load: 25.8 t ADT: 7,477

TOWN CREEK ROAD

Fair

Over: TOWN CREEK

1.95 MI N OF L TOWN CK RD, Allegany, MD

Built 1964 Load: 25.8 t ADT: 320

SANDS ROAD

Fair

Over: STOCKETTS RUN

3.0 MI SOUTH OF MD 214, Anne Arundel, MD

Built 1964 Load: 25.8 t ADT: 2,001

LINDEN AVENUE

Fair

Over: EAST BRANCH HERBERT RUN

0.06 MI S OF EAST DR, Baltimore, MD

Built 1982 Load: 25.8 t ADT: 4,590

Showing 251-300 of 5,484 bridges

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.

What to do with this

Use Maryland's inventory picture to drill to a county or a specific span.

  • Browse counties in Maryland 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. Maryland 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.