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

JAYHAWK RD

Fair

Over: UNKNOWN CREEK

W OF RECONNAISSANCE ST, Harford, MD

Built 2017 ADT: 100

BAUMGARDNER ROAD

Fair

Over: PINEY CREEK

0.12 MI N OF KEYSVILLE RD, Carroll, MD

Built 1925 Load: 0.0 t

OLD INGLESIDE AVEN

Fair

Over: DEAD RUN

200 FT E SECURITY BLVD, Baltimore, MD

Built 1928 Load: 5.0 t ADT: 7,940

TAWES DRIVE

Fair

Over: BIG ELK CREEK

2 MI. N OF MD RTE 273, Cecil, MD

Built 1860 Load: 7.3 t ADT: 10

PEARRE ROAD

Fair

Over: SAMS CREEK

WEST OF NEW WINDSOR, Carroll, MD

Built 1908 Load: 8.6 t ADT: 23

BELL MANOR RD

Fair

Over: CONOWINGO CREEK

0.03 MI N OF OLD CON RD, Cecil, MD

Built 1885 Load: 9.1 t ADT: 136

LICKING CREEK ROAD

Fair

Over: LANES RUN

0.9 MI N OF US RTE 40, Washington, MD

Built 1960 Load: 10.0 t ADT: 40

HIGH BRIDGE ROAD

Fair

Over: TOWNSEND/CENTREVILLE RR

0.5 MILES EAST OF MD 313, Queen Anne's, MD

Built 1914 Load: 10.0 t ADT: 500

BLACKS MILL ROAD

Fair

Over: BIG HUNTING CREEK

WEST OF LAYMAN RD INT, Frederick, MD

Built 1914 Load: 10.4 t ADT: 450

CHERRY HILL ROAD

Fair

Over: DEER CREEK

0.02 MILES NE OF MD 24, Harford, MD

Built 1900 Load: 10.9 t ADT: 559

CRYSTAL FALLS DRIV

Fair

Over: BEAVER CREEK

0.36 MI N OF MD RTE 64, Washington, MD

Built 1890 Load: 10.9 t ADT: 678

MILLBROOK ROAD

Fair

Over: LITTLE ANTIETAM CREEK

0.5 MI W OF MD RTE 67, Washington, MD

Built 1920 Load: 10.9 t ADT: 1,173

MACARTHUR BLVD.

Fair

Over: CABIN JOHN CREEK

1.5 MI. E. OF I-495, Montgomery, MD

Built 1863 Load: 11.7 t ADT: 6,000

NEW BRIDGE RD

Fair

Over: OCTORARO CREEK

0.02 MI W OF HORSESHOE RD, Cecil, MD

Built 1884 Load: 12.2 t ADT: 1,279

GORMAN STREET

Fair

Over: NYDEGGER RUN

0.32 MI NORTH OF MD 560, Garrett, MD

Built 2002 Load: 12.2 t ADT: 53

PARK ROAD 2

Fair

Over: LITTLE TONOLOWAY CREEK

0.16 MI N MD RT 144, Washington, MD

Built 1950 Load: 12.8 t ADT: 123

POLLING HOUSE ROAD

Fair

Over: ROCK BRANCH

0.7 MI N OF MD RTE 422, Anne Arundel, MD

Built 1965 Load: 13.2 t ADT: 375

BENNIES HILL ROAD

Fair

Over: CATOCTIN CREEK

0.65 MI EAST OF MD 17, Frederick, MD

Built 1880 Load: 13.2 t ADT: 131

SHAWAN ROAD

Fair

Over: TRIBUTARY OF OREGON BRAN

0.7 MI E OF FALLS RD, Baltimore, MD

Built 1920 Load: 13.6 t ADT: 16,772

THISTLE ROAD

Fair

Over: TRIBUTARY TO PATAPSCO RI

0.57 MI S OF MD 144, Baltimore, MD

Built 1920 Load: 13.6 t ADT: 2,400

LOCH RAVEN DRIVE

Fair

Over: MINEBANK RUN

0.09 MI W CROMWELL BRDG R, Baltimore city, MD

Built 1900 Load: 13.6 t ADT: 309

KEYSVILLE ROAD

Fair

Over: TOMS CREEK

2.0 MI NORTHEAST OF MD 76, Frederick, MD

Built 1876 Load: 13.6 t ADT: 451

PUTNAM ROAD

Fair

Over: WEST BRANCH/WINTERS RUN

1.5 MILES E OF MD 165, Harford, MD

Built 1950 Load: 13.6 t ADT: 648

GLEN ROAD

Fair

Over: KILGOUR BRANCH

1.5 MI WEST OF MD 189, Montgomery, MD

Built 1942 Load: 13.6 t ADT: 5,880

KEEDYSVILLE ROAD

Fair

Over: ANTIETAM CREEK

0.8 MI NW OF MD RTE 34, Washington, MD

Built 1830 Load: 13.6 t ADT: 1,173

DOGSTREET ROAD

Fair

Over: LITTLE ANTIETAM CREEK

1.89 MI W OF MD RTE 67, Washington, MD

Built 1850 Load: 13.6 t ADT: 1,560

FORGE HILL ROAD

Fair

Over: DEER CREEK

1.6 MILES S OF US 1, Harford, MD

Built 1925 Load: 13.9 t ADT: 112

MD 550

Fair

Over: CABBAGE RUN

1.39 MILES NORTH OF MD 26, Frederick, MD

Built 1939 Load: 14.5 t ADT: 2,785

US 340

Fair

Over: POTOMAC RIVER CSX TRANS

ON VIRGINIA STATE LINE, Washington, MD

Built 1946 Load: 14.5 t ADT: 20,830

JACOBS ROAD

Fair

Over: SEVERN RUN

0.64 MI E OF MD 174, Anne Arundel, MD

Built 1974 Load: 14.5 t ADT: 4,339

MCCAULEY ROAD

Fair

Over: BASIN RUN

0.01 MI NE OF DR JACK RD, Cecil, MD

Built 1884 Load: 14.5 t ADT: 526

STEVENS ROAD

Fair

Over: HUNTING CREEK

WEST OF OLD FREDERICK RD, Frederick, MD

Built 1914 Load: 14.5 t ADT: 135

MATTHEW HENSON AVE

Fair

Over: CATTAIL BRANCH

0.04 MI S GREEN LEAF RD, Prince George's, MD

Built 1956 Load: 14.5 t ADT: 2,241

CUBA ROAD

Fair

Over: WESTERN RUN

0.3 MI S WESTERN RUN RD, Baltimore, MD

Built 1893 Load: 15.0 t ADT: 3,524

RESEARCH AVENUE

Fair

Over: TRIBUTARY TO PATAPSCO RI

0.08 MI W OF HMDS FERY RD, Baltimore, MD

Built 1955 Load: 15.0 t ADT: 224

MARSHALL AVENUE

Fair

Over: TRIBUTARY TO PATUXENT RI

0.17 MILES EAST OF US 1, Prince George's, MD

Built 1962 Load: 15.0 t ADT: 15,635

PROSPECT STREET

Fair

Over: ANTIETAM STREET

1000 FT W OF US RTE 40 E, Washington, MD

Built 1836 Load: 15.0 t ADT: 2,730

WRIGHTS MILL ROAD

Fair

Over: GRANITE BRANCH

0.46 MI N OF DAVIS AVE, Baltimore, MD

Built 1920 Load: 15.4 t ADT: 239

NEW VALLEY ROAD

Fair

Over: BASIN RUN

0.03 MI N OF BASIN RUN RD, Cecil, MD

Built 1977 Load: 15.4 t ADT: 109

HOLTER ROAD

Fair

Over: HOLLOW CREEK

1 MILE SOUTHEAST OF MD 17, Frederick, MD

Built 1920 Load: 15.4 t ADT: 3,333

SPRING GAP ACCESS

Fair

Over: C&O CANAL

0.1 miles from Spring Gap, Allegany, MD

Built 1969 Load: 15.4 t ADT: 72

MAINTENANCE ROAD

Fair

Over: BLUE BLAZES CREEK

US-15N WEST ON MC-77 TO, Frederick, MD

Built 1960 Load: 15.4 t ADT: 50

MD 717

Fair

Over: WESTERN BRANCH

0.13 MILE NORTH OF MD 4, Prince George's, MD

Built 1900 Load: 15.9 t ADT: 11,061

SLABTOWN ROAD

Fair

Over: UNNAMED STREAM

0.40 MI NE OF MD 36, Allegany, MD

Built 1991 Load: 15.9 t ADT: 258

MOORES ROAD

Fair

Over: SAW MILL BRANCH

0.04 MILES N OF GREENE RD, Harford, MD

Built 1952 Load: 15.9 t ADT: 724

DUVALL BRIDGE ROAD

Fair

Over: PATUXENT RIVER

TRACT #9 / CENTRAL TRACT, Anne Arundel, MD

Built 1907 Load: 16.3 t ADT: 25

MD 695 RAMPS 1

Fair

Over: CABIN BRANCH

0.29 MI W OF MD 10, Anne Arundel, MD

Built 1972 Load: 16.3 t ADT: 66,222

MOUNT GILEAD ROAD

Fair

Over: TRIBUTARY TO NORTH BRANC

1.28 MILES NW OF MD 30, Baltimore, MD

Built 1975 Load: 16.3 t ADT: 338

CROW ROCK ROAD

Fair

Over: MIDDLE CREEK

AT MD 17 INTERSECTION, Frederick, MD

Built 1897 Load: 16.3 t ADT: 460

SUMANTOWN ROAD

Fair

Over: CATOCTIN CREEK

1.5 MI W OLD MIDDLETOWN R, Frederick, MD

Built 1900 Load: 16.3 t ADT: 124

Showing 1-50 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.