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

PENNINGTON AVENUE

Fair

Over: CURTIS CREEK

2 MI S PATAPSCO AVE, Baltimore city, MD

Built 1976 Load: 31.3 t ADT: 13,500

FLICKINGER ROAD

Fair

Over: BIG PIPE CREEK

0.34 MI N OF STONE RD, Carroll, MD

Built 1940 Load: 31.3 t ADT: 180

BIGGS FORD ROAD

Fair

Over: MONOCACY RIVER

0.55 MI E OF US RTE 15, Frederick, MD

Built 1970 Load: 31.3 t ADT: 6,393

QUAKER BOTTOM ROAD

Fair

Over: ROCK RUN

0.01 MIL S OF ROCK RUN RD, Harford, MD

Built 1982 Load: 31.3 t ADT: 220

SUITLAND ROAD

Fair

Over: HENSON CREEK

.10 MI S OF SUITLAND PKWY, Prince George's, MD

Built 1971 Load: 31.3 t ADT: 15,302

IS 95 RAMP D

Fair

Over: GWYNN FALLS MIDDLE BR

0.3 MI E RUSSELL ST, Baltimore city, MD

Built 1977 Load: 31.3 t ADT: 15,504

IS 95 SB

Fair

Over: US 40(PULASKI HWY)

1.0 MI. SOUTH OF EXIT 62, Baltimore city, MD

Built 1973 Load: 31.3 t ADT: 62,158

MD 155

Fair

Over: I-95

Milepost M89.0, Harford, MD

Built 1960 Load: 31.3 t ADT: 15,420

US 40 ALT

Fair

Over: BRADDOCK RUN

0.02 MI W OF MD 55, Allegany, MD

Built 1947 Load: 31.7 t ADT: 9,951

MD 53

Fair

Over: WINCHESTER RUN

0.62 MILE NORTH OF MD 951, Allegany, MD

Built 1924 Load: 31.7 t ADT: 12,872

US 220

Fair

Over: TRIB TO NORTH BR POTOMAC

1.21 M N OF MD 830A, Allegany, MD

Built 1900 Load: 31.7 t ADT: 7,111

IS 68 EBR

Fair

Over: MD 55

1.53 MI E OF MD 36, Allegany, MD

Built 1973 Load: 31.7 t ADT: 26,410

US 1 ALT

Fair

Over: US1 NBR AMTRAK HERBERT

1.40 MI S OF IS 695, Baltimore, MD

Built 1936 Load: 31.7 t ADT: 18,083

MD 26

Fair

Over: BRANCH OF GWYNNS FALLS

0.48 MILE EAST OF IS 695, Baltimore, MD

Built 1965 Load: 31.7 t ADT: 46,342

MD 31

Fair

Over: SAMS CREEK

ON FREDERICK CO LINE, Carroll, MD

Built 1921 Load: 31.7 t ADT: 2,611

US 40 EB

Fair

Over: NORTHEAST CREEK

0.54 MILE EAST OF MD 272, Cecil, MD

Built 1939 Load: 31.7 t ADT: 14,917

US 40 WB

Fair

Over: NORTHEAST CREEK

0.54 MILE EAST OF MD 272, Cecil, MD

Built 1939 Load: 31.7 t ADT: 14,332

MD 224

Fair

Over: REEDER RUN

1.03 MILE NORTH OF MD 344, Charles, MD

Built 1928 Load: 31.7 t ADT: 1,192

MD 488

Fair

Over: KERRICK SWAMP

1.99 MILES EAST OF MD 6, Charles, MD

Built 1931 Load: 31.7 t ADT: 6,540

MD 14

Fair

Over: MARSHYHOPE CREEK

0.61 MILE WEST OF MD 313, Dorchester, MD

Built 1931 Load: 31.7 t ADT: 1,550

GREEN LANTERN RD

Fair

Over: IS 68

0.23 MI S OF US 40AL, Garrett, MD

Built 1975 Load: 31.7 t ADT: 999

ST JOHNS LANE

Fair

Over: IS 70

0.8 MI W OF US 29, Howard, MD

Built 1966 Load: 31.7 t ADT: 4,382

MD 354

Fair

Over: DAVIS BRANCH

0.52 M S OF WICOMICO CO, Worcester, MD

Built 1932 Load: 31.7 t ADT: 1,532

BLACK VALLEY ROAD

Fair

Over: FLINTSTONE CREEK

0.02 MI E OF DOLLY RD, Allegany, MD

Built 1964 Load: 31.7 t ADT: 499

LONG GREEN ROAD

Fair

Over: LONG GREEN CREEK

100 FT W LONG GREEN PIKE, Baltimore, MD

Built 1970 Load: 31.7 t ADT: 1,621

JOPPA ROAD

Fair

Over: ROLAND RUN

0.2 MI W OF BELLONA AVE, Baltimore, MD

Built 1970 Load: 31.7 t ADT: 5,886

TREVANION ROAD

Fair

Over: BIG PIPE CREEK

2.05 MILES N OF MD 84, Carroll, MD

Built 1966 Load: 31.7 t ADT: 2,569

KNIFE BOX ROAD

Fair

Over: GAREY MILL POND BRANCH

2.0 MILES NORTH OF MD 317, Caroline, MD

Built 1996 Load: 31.7 t ADT: 1,065

FALLING BRANCH RD

Fair

Over: FALLING BRANCH

0.6 MI W OF CLERMONT M RD, Harford, MD

Built 1973 Load: 31.7 t ADT: 22

FAIRLAND ROAD

Fair

Over: PAINT BRANCH

1.5 MI WEST OF US 29, Montgomery, MD

Built 1965 Load: 31.7 t ADT: 17,033

CIRCLE AVENUE

Fair

Over: EAST BR OF WICOMICO RIVE

0.2 MI S OF US 50 BUS, Wicomico, MD

Built 1968 Load: 31.7 t ADT: 2,025

IS 695 IL

Fair

Over: CURTIS CR B&O RR

0.36 MI N OF AA CO LINE, Baltimore city, MD

Built 1975 Load: 31.7 t ADT: 21,765

ABINGDON ROAD

Fair

Over: I-95

I-95 Milepost M77.9, Harford, MD

Built 1963 Load: 31.7 t ADT: 13,161

MD 36

Fair

Over: JENNINGS RUN

1.83 MI S OF MD 47, Allegany, MD

Built 1929 Load: 32.2 t ADT: 2,290

STEVENSON ROAD

Fair

Over: IS 695

0.50 MI N OF MD 129, Baltimore, MD

Built 1961 Load: 32.2 t ADT: 8,404

IS 695 RAMP C

Fair

Over: IS 95 RAMP G

0.92 MI N OF US 1, Baltimore, MD

Built 1969 Load: 32.2 t ADT: 25,791

IS 95 NBR

Fair

Over: IS 695 RAMPS 3 & 5

0.75 MILE NORTH OF US 1, Baltimore, MD

Built 1969 Load: 32.2 t ADT: 184,000

TAYLOR AVENUE

Fair

Over: TRIB TO HERRING RUN

.03 MI. W. OF MD 41, Baltimore, MD

Built 1963 Load: 32.2 t ADT: 6,328

MD 227

Fair

Over: MATTAWOMAN CREEK

1.29 MILES EAST OF MD 224, Charles, MD

Built 1930 Load: 32.2 t ADT: 3,231

MD 28

Fair

Over: TUSCARORA CREEK

1.85 MILES WEST OF MD 85, Frederick, MD

Built 2007 Load: 32.2 t ADT: 3,212

MD 175 EB

Fair

Over: US 29

4.06 MILES N OF MD 108, Howard, MD

Built 1974 Load: 32.2 t ADT: 22,557

MD 175 WB

Fair

Over: US 29

4.06 MILES N OF MD 108, Howard, MD

Built 1974 Load: 32.2 t ADT: 21,673

PERSIMMON TREE RD

Fair

Over: IS 495

0.06 MI S OF MD 996, Montgomery, MD

Built 1962 Load: 32.2 t ADT: 2,910

IS 95 RAMP B(7)

Fair

Over: IS 95

0.32 MILE SOUTH OF MD 198, Prince George's, MD

Built 1971 Load: 32.2 t ADT: 4,443

MD 197

Fair

Over: AMTRAK

0.19 MILE S OF MD 197C, Prince George's, MD

Built 1981 Load: 32.2 t ADT: 19,692

US 301 SB

Fair

Over: RED LION BRANCH

0.27 MILE NORTH OF MD 290, Queen Anne's, MD

Built 1967 Load: 32.2 t ADT: 10,370

STABLERSVILLE ROAD

Fair

Over: FOURTH MINE BRANCH

0.2 MI E OF YORK RD, Baltimore, MD

Built 1950 Load: 32.2 t ADT: 600

GWYNNDALE AVENUE

Fair

Over: POWDER MILL BRANCH

0.12 MI N OF MD 126, Baltimore, MD

Built 1956 Load: 32.2 t ADT: 5,903

COUNTRY LANE

Fair

Over: TRIB. OF MATTAWOMAN CREE

1 mile East of US 301, Charles, MD

Built 1960 Load: 32.2 t ADT: 228

JOHN HYDE ROAD

Fair

Over: LITTLE PIPE CREEK

0.01 MI S OF JASONTOWN RD, Carroll, MD

Built 1900 Load: 32.2 t ADT: 320

Showing 551-600 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.