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

PALMER ROAD SOUTH

Fair

Over: STONE LAKE RD/PARKING LT

600M E OF WOOD RD, Montgomery, MD

Built 1981 Load: 29.3 t ADT: 2,750

MD 103

Fair

Over: BRANCH OF DEEP RUN

0.16 MI S OF HOWARD CO, Anne Arundel, MD

Built 1949 Load: 29.5 t ADT: 8,191

IS 695 RAMP L

Fair

Over: MTA LIGHT RAIL

0.04 MI N OF MD 170, Anne Arundel, MD

Built 1967 Load: 29.5 t ADT: 2,205

MD 695 OL

Fair

Over: NORFOLK SOUTHERN RR

0.18 MILE SOUTH OF MD 151, Baltimore, MD

Built 1966 Load: 29.5 t ADT: 41,012

MD 695 OL

Fair

Over: MD 150

0.62 MILE SOUTH OF MD 151, Baltimore, MD

Built 1965 Load: 29.5 t ADT: 41,012

SELFORD ROAD

Fair

Over: MD 166

0.08 MI N OF IS 195, Baltimore, MD

Built 1975 Load: 29.5 t ADT: 4,011

MD 227

Fair

Over: MILL SWAMP

2.01 MILES WEST OF MD 210, Charles, MD

Built 1956 Load: 29.5 t ADT: 5,611

IS 70 RAMP A & E

Fair

Over: US 15/US 340

0.37 MILE EAST OF MD 180, Frederick, MD

Built 1968 Load: 29.5 t ADT: 13,542

US 40/US 219

Fair

Over: IS 68

0.47 MILE N OF MD 948H, Garrett, MD

Built 1975 Load: 29.5 t ADT: 4,402

US 1

Fair

Over: MD 24

1.1 MILES S OF US 1BU, Harford, MD

Built 1964 Load: 29.5 t ADT: 20,002

MD 646

Fair

Over: BROAD CREEK

0.77 MILE NORTH OF MD 543, Harford, MD

Built 1933 Load: 29.5 t ADT: 1,140

US 1

Fair

Over: HAMMOND BRANCH

1.28 MILES SOUTH OF MD 32, Howard, MD

Built 1929 Load: 29.5 t ADT: 36,052

MD 355 SB

Fair

Over: IS 495 OL

0.07 MILE NORTH OF IS 495, Montgomery, MD

Built 1959 Load: 29.5 t ADT: 55,020

US 1 NB

Fair

Over: NORTHWEST BRANCH

0.68 MILE NORTH OF MD 208, Prince George's, MD

Built 1956 Load: 29.5 t ADT: 7,673

MD 4 WB

Fair

Over: PATUXENT RIVER

ON ANNE ARUNDEL CO LINE, Prince George's, MD

Built 1991 Load: 29.5 t ADT: 49,641

US 40 WB

Fair

Over: ANTIETAM CREEK

AT EASTERN BOULEVARD, Washington, MD

Built 1936 Load: 29.5 t ADT: 21,558

US 13 BU

Fair

Over: POCOMOKE RIVER

ON SOMERSET CO LINE, Worcester, MD

Built 1920 Load: 29.5 t ADT: 3,062

OLD STONEY RUN RD

Fair

Over: STONEY RUN

0.5 MI N OF STONEY RUN RD, Anne Arundel, MD

Built 1965 Load: 29.5 t ADT: 23

SEAT PLEASANT DRIV

Fair

Over: CABIN BRANCH

0.05 MI S OF ASHLEAF AVE, Prince George's, MD

Built 1958 Load: 29.5 t ADT: 6,136

SECURITY ROAD

Fair

Over: HAMILTON RUN

AT INT OF BROOKLINE AVE, Washington, MD

Built 1957 Load: 29.5 t ADT: 2,518

I-895 NB

Fair

Over: I-695

I-895 NB Milepost 3.5, Baltimore, MD

Built 1957 Load: 29.5 t ADT: 9,352

MD 935

Fair

Over: GEORGES CREEK

0.09 M N OF C STREET, Allegany, MD

Built 1933 Load: 29.9 t ADT: 1,430

IS 70 EBR

Fair

Over: PATAPSCO RIVER CSX TRAN

ON HOWARD CO LINE, Baltimore, MD

Built 1965 Load: 29.9 t ADT: 89,503

IS 70 WBR

Fair

Over: PATAPSCO RIVER CSX TRAN

ON HOWARD CO LINE, Baltimore, MD

Built 1965 Load: 29.9 t ADT: 89,503

US 40

Fair

Over: CATOCTIN CREEK

0.17 MILE WEST OF MD 17, Frederick, MD

Built 1936 Load: 29.9 t ADT: 5,432

MD 77

Fair

Over: BEAVER BRANCH

0.63 MILE WEST OF MD 76, Frederick, MD

Built 1928 Load: 29.9 t ADT: 1,211

IS 270 WBR(RAMP 1)

Fair

Over: IS 70 EBR

0.09 MILE SOUTH OF US 40, Frederick, MD

Built 1967 Load: 29.9 t ADT: 14,067

NEW GERMANY ROAD

Fair

Over: IS 68 US 219

0.11 MI S OF US 40AL, Garrett, MD

Built 1974 Load: 29.9 t ADT: 430

MD 7

Fair

Over: GRAYS RUN

1.01 MILES SOUTH OF US 40, Harford, MD

Built 1925 Load: 29.9 t ADT: 12,210

US 40

Fair

Over: PATAPSCO FOREST ROAD

0.5 MI W OF BALTIMORE CO, Howard, MD

Built 1936 Load: 29.9 t ADT: 37,530

MD 450

Fair

Over: MD 564 EBR AMTRAK

0.2 MILE EAST OF MD 564, Prince George's, MD

Built 1989 Load: 29.9 t ADT: 36,261

IS 95/495

Fair

Over: MD 414

1.56 MILES N OF MD 210, Prince George's, MD

Built 1963 Load: 29.9 t ADT: 143,828

MD 242

Fair

Over: TOMAKOKIN CREEK

0.71 MILE NORTH OF MD 238, St. Mary's, MD

Built 1936 Load: 29.9 t ADT: 5,491

WENDOVER AVENUE

Fair

Over: TRIBUTARY TO HERRING RUN

0.2 MI N OF TAYLOR AVE, Baltimore, MD

Built 1968 Load: 29.9 t ADT: 400

SHEPHERD AVENUE

Fair

Over: TRIBUTARY TO HERRING RUN

0.02 MI N OF TAYLOR AVE, Baltimore, MD

Built 1969 Load: 29.9 t ADT: 439

GARDENHOUR RD

Fair

Over: LITTLE ANTIETAM CREEK

0.45 MI W OF MD RTE 64, Washington, MD

Built 1910 Load: 29.9 t ADT: 315

GOOD LUCK ROAD

Fair

Over: BW PARKWAY

1.5 MILES SOUTH OF I-95, Prince George's, MD

Built 1952 Load: 29.9 t ADT: 25,800

SUITLAND PARKWAY

Fair

Over: BRANCH AVENUE

1.5 MILES WEST OF SILVER, Prince George's, MD

Built 1943 Load: 29.9 t ADT: 19,550

OAKLAND-SANG RUN R

Fair

Over: DEEP CREEK

0.09 M N INT MAYHEW INN R, Garrett, MD

Built 1967 Load: 30.1 t ADT: 529

MD 636

Fair

Over: WARRIOR RUN

0.02 MILE EAST OF MD 53, Allegany, MD

Built 1936 Load: 30.4 t ADT: 8,071

MD 157 (PENINSULA

Fair

Over: BEAR CREEK

1.39 MILE NORTH OF MD 158, Baltimore, MD

Built 1960 Load: 30.4 t ADT: 9,414

IS 70

Fair

Over: BUSH CREEK

0.84 MILE EAST OF MD 75, Frederick, MD

Built 1954 Load: 30.4 t ADT: 69,020

MD 26

Fair

Over: DOLLYHYDE CREEK

0.34 MILE EAST OF MD 31, Frederick, MD

Built 1932 Load: 30.4 t ADT: 5,482

MD 136

Fair

Over: ISLAND BRANCH

1.0 MILE SOUTH OF MD 23, Harford, MD

Built 1935 Load: 30.4 t ADT: 1,901

MD 213

Fair

Over: SASSAFRAS RIVER

ON CECIL COUNTY LINE, Kent, MD

Built 1987 Load: 30.4 t ADT: 5,308

IS 95X SB

Fair

Over: PAINT BRANCH

0.33 M N OF BR NO 1612900, Prince George's, MD

Built 1967 Load: 30.4 t ADT: 3,760

MD 370

Fair

Over: MILES RIVER

0.98 MILE NORTH OF MD 33, Talbot, MD

Built 1984 Load: 30.4 t ADT: 2,943

MD 309

Fair

Over: NORWICH CREEK

0.03 MILE S OF MD 404AL, Talbot, MD

Built 1960 Load: 30.4 t ADT: 4,042

IS 70 EB

Fair

Over: RAMP E2 FROM MD 615

2.3 MILES E OF MD 144WB, Washington, MD

Built 1960 Load: 30.4 t ADT: 34,830

IS 70 WB

Fair

Over: RAMP E2 FROM MD 615

2.3 MILES E OF MD 144WB, Washington, MD

Built 1960 Load: 30.4 t ADT: 34,830

Showing 451-500 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.