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 ROAD

Good

Over: THOMAS RUN

0.2 MILE E OF THOMAS R RD, Harford, MD

Built 1975 Load: 57.6 t ADT: 249

OLD SOUTHAMPTON RO

Good

Over: BYNUM RUN

0.6 MILES S OF MD 543, Harford, MD

Built 1930 Load: 57.6 t ADT: 51

BURNING TREE ROAD

Good

Over: BOOZE CREEK

0.5 MILES SOUTH OF MD 191, Montgomery, MD

Built 2008 Load: 57.6 t ADT: 1,938

Ramp WS & WN

Good

Over: Ramp NW

0.5 mi S Briggs Chaney Rd, Montgomery, MD

Built 2011 Load: 57.6 t ADT: 2,706

RAGAN ROAD

Good

Over: BRANCH OF OCTORARO CREEK

0.89 MI E OF US RTE 222, Cecil, MD

Built 2011 Load: 57.7 t ADT: 327

IS 97 RAMP A

Good

Over: IS 97

0.14 MILE NORTH OF MD 100, Anne Arundel, MD

Built 1996 Load: 58.0 t ADT: 43,587

MD 291

Good

Over: US 301

0.08 MILE WEST OF MD 701, Kent, MD

Built 1999 Load: 58.0 t ADT: 2,791

US 50

Good

Over: RAMP C

0.109 MILE WEST OF US 13, Wicomico, MD

Built 2001 Load: 58.0 t ADT: 18,971

WHITE MARSH ROAD

Good

Over: TRIBUTARY TO WHITE MARSH

1.0 MI E OF MD RT 1, Baltimore, MD

Built 2005 Load: 58.0 t ADT: 3,320

STEVENSON ROAD

Good

Over: LITTLE NORTHEAST CREEK

0.02 MI E OF STEVENSON RD, Cecil, MD

Built 2008 Load: 58.0 t ADT: 3,009

GALESTOWN RELIANCE

Good

Over: GALESTOWN MILLPOND

1.5 Mi. NE of JNC Rt 313, Dorchester, MD

Built 2008 Load: 58.0 t ADT: 1,259

ARNOLDTOWN ROAD

Good

Over: TRIB. OF BROAD RUN

0.4 MI W OF PICNIC WOODS, Frederick, MD

Built 1984 Load: 58.0 t ADT: 407

BOTTOM ROAD

Good

Over: OVERSHOT BRANCH

0.03 MILES N OF GUYTON RD, Harford, MD

Built 1978 Load: 58.0 t ADT: 300

CLARKSBURG ROAD

Good

Over: LITTLE BENNETT CREEK TRI

2.8 MILES NORTH OF MD 355, Montgomery, MD

Built 1988 Load: 58.0 t ADT: 2,969

I - 195 WB

Good

Over: RAMP X

BWI AIRPORT, Anne Arundel, MD

Built 2002 Load: 58.0 t ADT: 20,000

I695W RAMP TO I95N

Good

Over: STEMMERS RUN

I95/I695 INTERCHANGE, Baltimore, MD

Built 2008 Load: 58.0 t ADT: 13,836

MD 4 SB

Good

Over: MD 223

1.37 MILES S OF MD 4PB, Prince George's, MD

Built 2014 Load: 58.3 t ADT: 63,050

MD 55

Good

Over: BRADDOCK RUN

0.27 MI W OF IS 68, Allegany, MD

Built 1950 Load: 58.5 t ADT: 2,552

US 220

Good

Over: EVITTS CREEK

0.71 MILE NORTH OF I-68, Allegany, MD

Built 1999 Load: 58.5 t ADT: 3,841

MD 140

Good

Over: MD MID RR MD27 WEST BR

0.02 MILE NORTH OF MD 27, Carroll, MD

Built 2006 Load: 58.5 t ADT: 45,521

IS 70 EBR

Good

Over: CSX TRANS AND SOUTH STRE

0.53 MI W OF MD 144 FA, Frederick, MD

Built 2013 Load: 58.5 t ADT: 68,623

IS 70 WBR

Good

Over: CSX TRANS AND SOUTH ST

0.53 MI W OF MD 144 FA, Frederick, MD

Built 2013 Load: 58.5 t ADT: 68,623

ACTON LANE

Good

Over: MATTAWOMAN CREEK

ON CHARLES COUNTY LINE, Charles, MD

Built 2001 Load: 58.5 t ADT: 9,665

SINGLETON DRIVE

Good

Over: TRIB OF PETER PAN RUN

EAST OF ADDISON WOODS RD, Frederick, MD

Built 1999 Load: 58.5 t ADT: 600

TALBOT RUN ROAD

Good

Over: TALBOT BRANCH

0.25 MI E OF WOODVILLE RD, Frederick, MD

Built 1979 Load: 58.5 t ADT: 215

SINGER ROAD

Good

Over: MOUNTAIN BRANCH

1.7 MILES E OF MD 152, Harford, MD

Built 2003 Load: 58.5 t ADT: 4,530

DRY BRANCH ROAD

Good

Over: TRIB / DEER CREEK

0.4 MILES W OF MD 23, Harford, MD

Built 1999 Load: 58.5 t ADT: 82

MD 200 (ICC) EB

Good

Over: Good Hope Tributary

0.48 Mi East of MD650, Montgomery, MD

Built 2010 Load: 58.5 t ADT: 31,755

Ramp ES

Good

Over: Ramp SE

0.12 mi W of 29/200 I/C, Montgomery, MD

Built 2011 Load: 58.5 t ADT: 2,449

MD 10 SBR

Good

Over: MD 100 WBR

0.17 MI S OF MD 177, Anne Arundel, MD

Built 1988 Load: 59.0 t ADT: 33,320

MD 7C

Good

Over: AMTRAK

2.34 MILE NORTH OF MD 272, Cecil, MD

Built 1991 Load: 59.0 t ADT: 4,860

NEW DESIGN ROAD

Good

Over: IS 70

0.51 MI W OF MD 355, Frederick, MD

Built 2002 Load: 59.0 t ADT: 17,294

MD 180 EASTBOUND

Good

Over: US 15

0.49 MILE EAST OF IS 70, Frederick, MD

Built 2020 Load: 59.0 t ADT: 27,750

MD 100 EBR

Good

Over: US 29 RAMP 7

0.05 M N OF BR NO 1311900, Howard, MD

Built 1992 Load: 59.0 t ADT: 75,332

EMORY ROAD

Good

Over: DEEP RUN

0.38 MI E OF WESLEY ROAD, Carroll, MD

Built 2000 Load: 59.0 t ADT: 150

BEAVER DAM ROAD

Good

Over: BEAVER DAM CREEK

0.15 MI W OF MD 295, Prince George's, MD

Built 2003 Load: 59.0 t ADT: 450

LEITERSBURG-SMITHS

Good

Over: LITTLE ANTIETAM CREEK

1.02 MI SE OF MD RTE 60, Washington, MD

Built 1981 Load: 59.0 t ADT: 2,760

OLD FORGE ROAD

Good

Over: MARSH RUN

0.76 MI E OF MD RTE 60, Washington, MD

Built 1998 Load: 59.0 t ADT: 1,214

BAYSIDE ROAD

Good

Over: PAW PAW CREEK

0.19 MI SW OF MD 365, Worcester, MD

Built 2021 Load: 59.0 t ADT: 234

MUNCASTER MILL RD

Good

Over: MD 200 (ICC)

2.33 MI W OF MD 97, Montgomery, MD

Built 2010 Load: 59.0 t ADT: 19,690

BEE OAK ROAD

Good

Over: TRIBUTARY OF WOLF DEN BR

1 MI S OF CEDARVILLE RD, Prince George's, MD

Built 1975 Load: 59.0 t ADT: 100

LITTLE TONOLOWAY A

Good

Over: C&O CANAL

0.2 miles from Little Ton, Washington, MD

Built 1969 Load: 59.0 t ADT: 72

MD 56

Good

Over: TOMS RUN

1.9 MILES WEST OF MD 68, Washington, MD

Built 2023 Load: 59.3 t ADT: 500

BARKSDALE ROAD

Good

Over: WEST BRANCH OF CHRISTIAN

0.32 MI E OF APPLETON RD, Cecil, MD

Built 2008 Load: 59.3 t ADT: 2,053

MD 140 SBR

Good

Over: IS 795 RAMPS 1 & 6

0.17 MILE NORTH OF MD 795, Baltimore, MD

Built 1985 Load: 59.4 t ADT: 18,840

MD 410

Good

Over: GEORGETOWN BRANCH TRAIL

0.52 MILE EAST OF MD 355, Montgomery, MD

Built 1997 Load: 59.4 t ADT: 26,061

RESH MILL ROAD

Good

Over: GRAVE RUN

0.56 MI N OF FALLS RD, Baltimore, MD

Built 2005 Load: 59.4 t ADT: 232

MD 36

Good

Over: GEORGES CREEK

1.03 M S OF BR NO 0112700, Allegany, MD

Built 2008 Load: 59.9 t ADT: 7,706

MD 36

Good

Over: N BRANCH POTOMAC RIVER

ON WEST VIRGINIA LINE, Allegany, MD

Built 1994 Load: 59.9 t ADT: 4,720

MD 174

Good

Over: IS 97

0.24 MI W OF MD 779, Anne Arundel, MD

Built 2004 Load: 59.9 t ADT: 8,580

Showing 4,601-4,650 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.