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 129

Fair

Over: NORTH BRANCH

1.81 MI N OF MD 130, Baltimore, MD

Built 1900 Load: 23.6 t ADT: 900

MD 311

Fair

Over: BROADWAY BRANCH

1.47 MILE NORTH OF MD 287, Caroline, MD

Built 1950 Load: 23.6 t ADT: 3,460

MD 75

Fair

Over: SAMS CREEK

ON FREDERICK CO LINE, Carroll, MD

Built 1972 Load: 23.6 t ADT: 2,151

MD 140

Fair

Over: BIG PIPE CREEK

0.91 MILE SOUTH OF MD 832, Carroll, MD

Built 1964 Load: 23.6 t ADT: 13,070

MD 144FA & CO RD

Fair

Over: LONG BRANCH

0.504 M W OF CAR. CO LINE, Frederick, MD

Built 1954 Load: 23.6 t ADT: 13,511

MD 383

Fair

Over: CATOCTIN CREEK

1.52 MILES N OF MD 180, Frederick, MD

Built 1953 Load: 23.6 t ADT: 1,550

MD 136

Fair

Over: DEER CREEK

2.64 MILES SOUTH OF US 1, Harford, MD

Built 1931 Load: 23.6 t ADT: 9,984

MD 382

Fair

Over: MATAPONI CREEK

0.08 MI S OF MATTAPONI RD, Prince George's, MD

Built 1930 Load: 23.6 t ADT: 4,500

US 40

Fair

Over: LICKING CREEK

0.26 MILE EAST OF IS 70, Washington, MD

Built 1938 Load: 23.6 t ADT: 1,455

JOHNSON RD

Fair

Over: US 13

@ US 13, Wicomico, MD

Built 1975 Load: 23.6 t ADT: 1,990

HOLLIFIELD ROAD

Fair

Over: PATAPSCO RIVER

0.1 MI S JOHNNYCAKE ROAD, Baltimore, MD

Built 1934 Load: 23.6 t ADT: 11,453

WESTCHESTER AVENUE

Fair

Over: NO. 9 TROLLEY TRAIL

0.2 MI N FREDERICK RD, Baltimore, MD

Built 1900 Load: 23.6 t ADT: 1,741

UTICA ROAD

Fair

Over: FISHING CREEK

0.12 MI W OLD FREDERICK R, Frederick, MD

Built 1860 Load: 23.6 t ADT: 298

ACCIDENT FRIENDSVI

Fair

Over: BEAR CREEK

0.01 MI S ACC FRNDVLLE RD, Garrett, MD

Built 2002 Load: 23.6 t ADT: 120

L.Q. POWELL ROAD

Fair

Over: EAST CREEK

0.5 MI W OF TULLS CORNER, Somerset, MD

Built 1975 Load: 23.6 t ADT: 210

LOWER LEVEL ROADWA

Fair

Over: PEDESTRIAN TUNNEL

BWI HOURLY GARAGE TO TERM, Anne Arundel, MD

Built 1976 Load: 23.6 t ADT: 22,093

MARYLAND RT.458-SI

Fair

Over: SUITLAND PARKWAY

1.8 MILES FROM SUITLAND R, Prince George's, MD

Built 1943 Load: 23.6 t ADT: 42,725

CHERRY HILL RD

Fair

Over: IS 95

1.46 MI S OF MD 212, Prince George's, MD

Built 1971 Load: 23.9 t ADT: 20,920

US 50

Fair

Over: SINEPUXENT BAY

0.17 MILE WEST OF MD 528, Worcester, MD

Built 1942 Load: 23.9 t ADT: 33,920

MD 173

Fair

Over: STONEY CREEK

0.16 MILE SOUTH OF MD 642, Anne Arundel, MD

Built 1947 Load: 24.0 t ADT: 15,071

MD 181(SIXTH ST)

Fair

Over: SPA CREEK

ANNAPOLIS MD., Anne Arundel, MD

Built 1946 Load: 24.0 t ADT: 19,251

MD 225

Fair

Over: MATTAWOMAN CREEK

0.03 MILE EAST OF MD 224, Charles, MD

Built 1957 Load: 24.0 t ADT: 12,302

MD 355

Fair

Over: MONOCACY RIVER

2.29 MILES SOUTH OF MD 85, Frederick, MD

Built 1930 Load: 24.0 t ADT: 12,583

US 29 NB

Fair

Over: US 40

1.35 MILES SOUTH OF IS 70, Howard, MD

Built 1966 Load: 24.0 t ADT: 98,360

VOLLMERHAUSEN RD

Fair

Over: IS 95 NBR

0.63 MI S OF MD 32, Howard, MD

Built 1970 Load: 24.0 t ADT: 2,667

MD 4 EB

Fair

Over: RACE TRACK RD

0.37 MILE SOUTH OF MD 717, Prince George's, MD

Built 1960 Load: 24.0 t ADT: 46,652

HANOVER ROAD

Fair

Over: DEEP RUN

0.3 MI W OF MD RTE 295, Anne Arundel, MD

Built 1958 Load: 24.0 t ADT: 4,585

VINEGAR HILL ROAD

Fair

Over: LITTLE GUNPOWDER FALLS

0.29 MI SE OF JERICHO RD, Baltimore, MD

Built 1894 Load: 24.0 t ADT: 552

GLENCOE ROAD

Fair

Over: GUNPOWDER FALLS

1 MI E OF YORK RD, Baltimore, MD

Built 1976 Load: 24.0 t ADT: 364

GWYNN OAK AVENUE

Fair

Over: TRIBUTARY TO DEAD RUN

0.18 MI N OF SECURITY BLV, Baltimore, MD

Built 1956 Load: 24.0 t ADT: 6,450

GUILFORD AVENUE

Fair

Over: I-83 AND AMTRAK RAILROAD

0.08 MI S OF CALVERT ST, Baltimore city, MD

Built 1930 Load: 24.0 t ADT: 12,191

MANSFIELD ROAD

Fair

Over: CHERRY CREEK

0.74 MI W OF US RTE 219, Garrett, MD

Built 1986 Load: 24.0 t ADT: 97

STAFFORD ROAD

Fair

Over: HERRING RUN

0.01 MILE S OF LAPIDUM RD, Harford, MD

Built 1930 Load: 24.0 t ADT: 58

EDWARDS FERRY ROAD

Fair

Over: BROAD RUN

1 MI N OF WESTERLY ROAD, Montgomery, MD

Built 1982 Load: 24.0 t ADT: 312

HIGH GERMANY ROAD

Fair

Over: SIDELING HILL CREEK

0.3 MI N OF IS 68, Washington, MD

Built 1961 Load: 24.0 t ADT: 153

MD 450

Fair

Over: SEVERN RIVER

0.31 MI W OF MD 648A, Anne Arundel, MD

Built 1995 Load: 24.5 t ADT: 18,874

MD 263

Fair

Over: PLUM POINT CREEK

0.16 MI E OF TOBACCO RD, Calvert, MD

Built 1928 Load: 24.5 t ADT: 692

MD 17

Fair

Over: CSX TRANS. POTOMAC MUN

ON VIRGINIA LINE, Frederick, MD

Built 1953 Load: 24.5 t ADT: 6,073

MD 132

Fair

Over: AMTRAK

0.19 MILE EAST OF US 40, Harford, MD

Built 1983 Load: 24.5 t ADT: 3,900

MD 20

Fair

Over: RADCLIFF CREEK

0.06 MILE EAST OF MD 514, Kent, MD

Built 1950 Load: 24.5 t ADT: 6,850

MD 290

Fair

Over: RED LION BRANCH

0.21 MILE SOUTH OF US 301, Queen Anne's, MD

Built 1900 Load: 24.5 t ADT: 2,182

MD 367

Fair

Over: BISHOPVILLE PRONG

0.05 MILE WEST OF MD 368, Worcester, MD

Built 1936 Load: 24.5 t ADT: 5,245

MD 611

Fair

Over: SINEPUXENT BAY

0.17 M S OF SOUTH PT RD, Worcester, MD

Built 1964 Load: 24.5 t ADT: 5,302

MD 90

Fair

Over: US 113

0.4 MILE WEST OF MD 575, Worcester, MD

Built 1976 Load: 24.5 t ADT: 14,132

BACON ROAD

Fair

Over: FIRST MINE BRANCH

0.3 MI S OF HUNTER MILL R, Baltimore, MD

Built 1990 Load: 24.5 t ADT: 234

WINDEMERE PARKWAY

Fair

Over: DULANEY VALLEY BRANCH

0.1 MI S OF DULANEY VALLE, Baltimore, MD

Built 1959 Load: 24.5 t ADT: 643

SILVER RUN VALLEY

Fair

Over: BIG SILVER RUN

0.75 MI E OF MD 97, Carroll, MD

Built 1900 Load: 24.5 t ADT: 480

FRIENDS CREEK ROAD

Fair

Over: FRIENDS CREEK

1.5 MI NE OF EYLER VALLEY, Frederick, MD

Built 1910 Load: 24.5 t ADT: 123

ENTRANCE/EXIT PLAZ

Fair

Over: DAILY PARKING GARAGE

BWI DAILY GARAGE, Anne Arundel, MD

Built 2003 Load: 24.5 t ADT: 5,000

ROAD

Fair

Over: OWENS CREEK

Take Hwy 77 3 miles west, Frederick, MD

Built 1970 Load: 24.5 t ADT: 160

Showing 201-250 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.