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

STONEY RUN DRIVE

Fair

Over: WAREHOUSE RUN

1 MI W OF FLAT IRON ROAD, St. Mary's, MD

Built 1995 Load: 99.9 t ADT: 478

WILDEWOOD PARKWAY

Fair

Over: UNNAMED STREAM

.9 MI W OF WILDEWOOD BLVD, St. Mary's, MD

Built 1995 Load: 99.9 t ADT: 5,900

GREENS CROSSING CO

Fair

Over: CRANEY CREEK

0.6 MI E. OF FLAT IRON RD, St. Mary's, MD

Built 2009 Load: 99.9 t ADT: 603

WILDEWOOD DR.

Fair

Over: UNNAMED TRIBUTARY

0.2 M S OF WILDEWOOD PKWY, St. Mary's, MD

Built 2010 Load: 99.9 t ADT: 1,024

WRIGHTS MILL ROAD

Fair

Over: MILES CREEK

2 MI E OF TRAPPE, Talbot, MD

Built 1985 Load: 99.9 t ADT: 225

RABBIT HILL ROAD

Fair

Over: POTTS MILL CREEK

0.5 MILE WEST OF US 50, Talbot, MD

Built 1991 Load: 99.9 t ADT: 827

HALFWAY BOULEVARD

Fair

Over: CSXT RAILROAD

0.17 MI W OF I 81, Washington, MD

Built 1965 Load: 99.9 t ADT: 18,183

KEEDYSVILLE ROAD

Fair

Over: LITTLE ANTIETAM CREEK

0.1 MI NW OF MD RTE 34, Washington, MD

Built 1858 Load: 99.9 t ADT: 1,173

COOPER ROAD

Fair

Over: CUTMAPTICO CREEK

2 MI SW UPPER FERRY CROSS, Wicomico, MD

Built 1997 Load: 99.9 t ADT: 1,060

I-95

Fair

Over: WHITEMARSH RUN

0.44 MI S OF MD RTE 43, Baltimore, MD

Built 1962 Load: 99.9 t ADT: 181,802

I-95

Fair

Over: GUNPOWDER FALLS

3.5 MI N OF MD 43, Baltimore, MD

Built 1963 Load: 99.9 t ADT: 172,113

IS 95

Fair

Over: MOORES RUN

0.30 MILES N OF US RT 40, Baltimore city, MD

Built 1971 Load: 99.9 t ADT: 121,313

I-95

Fair

Over: PRINCIPIO CREEK

Milepost M95.3, Cecil, MD

Built 1963 Load: 99.9 t ADT: 83,628

RESORT ROAD

Good

Over: UNNAMED PERENNIAL STREAM

1.0 MI NORTH OF US 40, Howard, MD

Built 2019 ADT: 1,233

RESORT ROAD

Good

Over: UNNAMED INTERMITTENT STR

0.7 MI NORTH OF US 40, Howard, MD

Built 2019 ADT: 1,233

OLD BALTIMORE RD

Good

Over: ROMNEY CREEK

WEST OF LIVE FIRE RD, Harford, MD

Built 2017 ADT: 100

COMBAT DRIVE

Good

Over: UNKNOWN CREEK

N RECONN ST & PISTOL RD, Harford, MD

Built 2017 ADT: 100

VARNUM STREET

Good

Over: STREAM

0.01 MI W OF 53RD PL, Prince George's, MD

Built 1958 Load: 4.1 t ADT: 275

APPLES CHURCH ROAD

Good

Over: OWENS CREEK

1 MI S OF MUD COLLEGE RD, Frederick, MD

Built 1917 Load: 9.5 t ADT: 350

COVELL ROAD

Good

Over: LITTLE BENNETT CREEK

WEST OF THURSTON ROAD INT, Frederick, MD

Built 1930 Load: 10.4 t ADT: 36

HOOVERS MILL ROAD

Good

Over: OWENS CREEK

AT FRUSHOUR RD INT, Frederick, MD

Built 1887 Load: 10.4 t ADT: 59

E. CHURCH HILL RD

Good

Over: MIDDLE CREEK

AT MD RTE 17 INT, Frederick, MD

Built 1908 Load: 10.9 t ADT: 204

DIXON ROAD

Good

Over: BENNETT CREEK

0.4 MI S OF THURSTON RD, Frederick, MD

Built 1904 Load: 12.7 t ADT: 200

TEMPLE HILL ROAD

Good

Over: PEA HILL BRANCH

1.2 MI. S. OF KIRBY ROAD, Prince George's, MD

Built 2021 Load: 13.6 t ADT: 10,964

SUMMIT AVENUE

Good

Over: JENNIFER BRANCH

0.05 MI W OF HOMELAND AVE, Baltimore, MD

Built 1978 Load: 14.1 t ADT: 563

ST. MARKS ROAD

Good

Over: BROAD RUN

0.7 MILES SOUTH OF MD 383, Frederick, MD

Built 1900 Load: 15.0 t ADT: 196

UNNAMED ROAD

Good

Over: LITTLE CONOCOCHEAGUE CRE

250 FT W OF BLAIRS VALLEY, Washington, MD

Built 2002 Load: 15.0 t ADT: 10

JERICHO ROAD

Good

Over: LITTLE GUNPOWDER FALLS

0.2 MI S JERUSALEM ROAD, Baltimore, MD

Built 1865 Load: 15.9 t ADT: 530

UNNAMED ROAD

Good

Over: RATTLE RUN

500FT N OF MOORESVILLE RD, Washington, MD

Built 1997 Load: 15.9 t ADT: 10

WARDS CHAPEL ROAD

Good

Over: LOCUST RUN

0.57 MI N OF MD 26, Baltimore, MD

Built 1969 Load: 16.3 t ADT: 7,143

IS 95/495 OL LOCAL

Good

Over: IS 95/IS 495 RAMPS B & T

2.0 M W OF MD210 OXENHILL, Prince George's, MD

Built 2004 Load: 18.1 t ADT: 141,180

HOMELAND AVENUE

Good

Over: JENNIFER BRANCH

0.2 MI E OF MD RTE 147, Baltimore, MD

Built 1978 Load: 18.1 t ADT: 660

IS 95/495 EXP

Good

Over: IS 95/IS 495 RAMPS B & T

0.985 MILE WEST OF MD 210, Prince George's, MD

Built 2007 Load: 18.6 t ADT: 146,744

WELSH HILL ROAD

Good

Over: GEORGES CREEK

0.14 MI N OF MD 936, Allegany, MD

Built 1999 Load: 19.0 t ADT: 1,113

KLEJ GRANGE ROAD

Good

Over: JONES DITCH

1.63 MI NE OF MD 366, Worcester, MD

Built 2001 Load: 19.0 t ADT: 90

IS 95/IS 495 RMP Q

Good

Over: IS 95/IS 495 RAMPS B & T

2.0 MILES WEST OF MD 210, Prince George's, MD

Built 2006 Load: 19.5 t ADT: 191,981

HAWTHORNE STREET

Good

Over: CATTAIL BRANCH

0.10 M W OF KENTTOWN PL, Prince George's, MD

Built 1969 Load: 19.5 t ADT: 1,010

TIVERTON ROAD

Good

Over: SCOTTS LEVEL BRANCH

0.34 MI N OF MD 26, Baltimore, MD

Built 1966 Load: 20.0 t ADT: 3,116

CREAMERY ROAD

Good

Over: TOMS CREEK

0.4 MI S OF US RTE 15, Frederick, MD

Built 1928 Load: 20.0 t ADT: 263

IS 95/495 IL LOCAL

Good

Over: IS 95/IS 495 RAMPS B & T

2.0 MILES WEST OF MD 210, Prince George's, MD

Built 2006 Load: 20.4 t ADT: 141,180

US 13 SB

Good

Over: MD 346

0.37 MILE NORTH OF US 50, Wicomico, MD

Built 1972 Load: 20.4 t ADT: 36,390

RODDY ROAD

Good

Over: OWENS CREEK

0.37 MI E OF US RTE 15, Frederick, MD

Built 1856 Load: 20.9 t ADT: 1,170

REICHS FORD ROAD

Good

Over: BUSH CREEK

0.5 MI W OF IJAMSVILLE RD, Frederick, MD

Built 2020 Load: 21.1 t ADT: 1,015

LENHART ROAD

Good

Over: FISHING CREEK

0.5 MI E OLD FREDERICK RD, Frederick, MD

Built 1906 Load: 21.3 t ADT: 166

RIVER ROAD

Good

Over: TRIBUTARY TO PATAPSCO RI

0.6 MI E OF MD RTE 32, Howard, MD

Built 1975 Load: 21.8 t ADT: 1,160

MD 119

Good

Over: GREAT SENECA CREEK

2.0 MILES NORTH OF MD 124, Montgomery, MD

Built 1989 Load: 22.2 t ADT: 10,766

HARNEY ROAD

Good

Over: MONOCACY RIVER

AT CARROLL COUNTY LINE, Frederick, MD

Built 1989 Load: 22.7 t ADT: 815

DAM #4 ROAD

Good

Over: C&O CANAL

0.9 miles from Dam #4 on, Washington, MD

Built 1971 Load: 22.7 t ADT: 212

DAIRY ROAD

Good

Over: LITTLE FALLS

0.3 MI W OF YORK RD, Baltimore, MD

Built 1900 Load: 23.6 t ADT: 521

POWDER MILL ROAD

Good

Over: BEAVER DAM CREEK

CAPITAL BELTWAY TO EXIT 2, Prince George's, MD

Built 1950 Load: 23.6 t ADT: 10,000

Showing 3,451-3,500 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.