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

JOHN MCADAM DR

Good

Over: DORSEY BRANCH

800 FT S OF MD 175, Howard, MD

Built 2000 Load: 66.7 t ADT: 30

WINTERSON ROAD

Good

Over: MD 295 NBR

0.8 MI E OF CONCORSE DRIV, Anne Arundel, MD

Built 1990 Load: 67.1 t ADT: 7,530

WESTLAND BLVD

Good

Over: IS 695

AT IS 695, Baltimore, MD

Built 2003 Load: 67.1 t ADT: 1,155

IS 270

Good

Over: DR PERRY RD

1.18 MILES N OF MONT CO, Frederick, MD

Built 2010 Load: 67.1 t ADT: 87,230

BOLLINGER ROAD

Good

Over: STONY BRANCH

1.7 MILES NORTH OF MD 76, Frederick, MD

Built 1982 Load: 67.1 t ADT: 72

MT. TABOR ROAD

Good

Over: GRINDSTONE RUN

AT MONUMENT RD INTERSECTN, Frederick, MD

Built 1982 Load: 67.1 t ADT: 304

STULLTOWN ROAD

Good

Over: ANDOVER BRANCH

2.8 MI. NE JCT MD 300, Queen Anne's, MD

Built 1988 Load: 67.1 t ADT: 221

MD 151B (Wharf Roa

Good

Over: Warehouse Road and Trade

0.4 Mi. S. of MD 158, Baltimore, MD

Built 2022 Load: 67.4 t ADT: 12,750

VALLEY ROAD

Good

Over: BOOZE CREEK

40 FT E OF FALLEN OAK RD, Montgomery, MD

Built 1964 Load: 67.4 t ADT: 216

MD 146

Good

Over: IS 695

0.78 MI N OF MD 45, Baltimore, MD

Built 2001 Load: 67.6 t ADT: 24,902

MACTON ROAD

Good

Over: TRIB / BROAD CREEK

0.31 MI SW OF MD 136, Harford, MD

Built 2014 Load: 67.6 t ADT: 212

OAKINGTON ROAD

Good

Over: GASHEYS CREEK

0.8 MILES S OF MD 132, Harford, MD

Built 1993 Load: 67.6 t ADT: 1,330

GUN ROAD

Good

Over: PATAPSCO RIVER

PATAPSCO VALLEY ST PARK, Baltimore, MD

Built 1975 Load: 67.6 t ADT: 110

MD 25

Good

Over: GEORGES RUN

1.36 MI N OF MD 137, Baltimore, MD

Built 2015 Load: 67.7 t ADT: 4,400

GOLD MINE ROAD

Good

Over: HAWLINGS RIVER

0.4 MILES WEST OF MD 650, Montgomery, MD

Built 2019 Load: 67.7 t ADT: 2,792

MD 10 NBR

Good

Over: MD 100 EBR

0.56 MILE NORTH OF MD 2, Anne Arundel, MD

Built 1991 Load: 68.0 t ADT: 27,110

MD 496

Good

Over: BIG PIPE CREEK

3.52 MILEI WEST OF MD 30, Carroll, MD

Built 2018 Load: 68.0 t ADT: 3,975

MD 224

Good

Over: BR OF THORNE GUT

5.35 MILES NORTH OF MD 6, Charles, MD

Built 2018 Load: 68.0 t ADT: 50

MD 224

Good

Over: THORNE GUT

4.54 MILES NORTH OF MD 6, Charles, MD

Built 2018 Load: 68.0 t ADT: 71

IS 270 RAMPS J & F

Good

Over: NEW DESIGN ROAD

0.32 M S OF BR NO 1013700, Frederick, MD

Built 2002 Load: 68.0 t ADT: 14,067

MARRIOTTSVILLE RD

Good

Over: SOUTH BR PATAPSCO RIVER

ON HOWARD COUNTY LINE, Carroll, MD

Built 1986 Load: 68.0 t ADT: 12,255

SUGARLOAF PARKWAY

Good

Over: TRIB OF PETER PAN RUN

S OF BUSH CREEK DRIVE, Frederick, MD

Built 1999 Load: 68.0 t ADT: 1,080

MONUMENT ROAD

Good

Over: GRINDSTONE RUN

1.55 MI WEST OF MD 17, Frederick, MD

Built 1977 Load: 68.0 t ADT: 311

BONNIE BRANCH RD

Good

Over: BONNIE BRANCH

0.2 MI E OF COLLEGE AVE, Howard, MD

Built 2006 Load: 68.0 t ADT: 1,000

MUNCASTER ROAD

Good

Over: ROCK CREEK

1 MILE NORTH OF MD 115, Montgomery, MD

Built 2006 Load: 68.0 t ADT: 7,803

RACE TRACK ROAD

Good

Over: W B & A TRAIL

.3 MI NE OF BOWIE R TRACK, Prince George's, MD

Built 2000 Load: 68.0 t ADT: 11,670

IS 97 SBR

Good

Over: MD 997D

0.09 MI N OF MD 3, Anne Arundel, MD

Built 1989 Load: 68.5 t ADT: 102,300

MD 100 WBR

Good

Over: IS-97

I-97 MD 100 INTERCHANGE, Anne Arundel, MD

Built 1996 Load: 68.5 t ADT: 36,794

CROMWELL VALLEY PA

Good

Over: MINEBANK RUN

0.3 MI. NW CROMWELL BR RD, Baltimore, MD

Built 2005 Load: 68.5 t ADT: 212

CARRS MILL ROAD

Good

Over: WINTERS RUN

1.4 MILES N OF MD 152, Harford, MD

Built 1991 Load: 68.5 t ADT: 8,285

MONTROSE ROAD

Good

Over: RAMP TO I-270

0.1 MI W OF I-270, Montgomery, MD

Built 1990 Load: 68.5 t ADT: 22,375

SHETLANDS LANE

Good

Over: TRIBUTARY TO MARLEY CREE

0.80 MI S OF MD 100, Anne Arundel, MD

Built 1975 Load: 68.9 t ADT: 2,819

BENSON MILL ROAD

Good

Over: BLACKROCK RUN

0.3 MI E OF MD 25, Baltimore, MD

Built 2001 Load: 68.9 t ADT: 4,229

OWINGS MILLS BOULE

Good

Over: TRIBUTARY TO GWYNNS FALL

0.06 MI S OF GWYNBRK AVE, Baltimore, MD

Built 2003 Load: 68.9 t ADT: 29,024

MD-43

Good

Over: I-95 Ramps E & F

3.2 MI N OF I-695/I-95INT, Baltimore, MD

Built 2012 Load: 68.9 t ADT: 31,500

IS 70 EB

Good

Over: MD 63

1.61 MILES WEST OF US 81, Washington, MD

Built 2014 Load: 69.3 t ADT: 47,400

IS 70 WB

Good

Over: MD 63

1.61 MILES WEST OF US 81, Washington, MD

Built 2014 Load: 69.3 t ADT: 47,400

MD 17

Good

Over: MIDDLE CREEK

0.02 M S OF SPRUCE RUN RD, Frederick, MD

Built 1994 Load: 69.4 t ADT: 1,951

EARLS ROAD

Good

Over: AMTRAK RAILROAD

0.16 MI N OF MD RTE 150, Baltimore, MD

Built 2000 Load: 69.4 t ADT: 4,370

PATAPSCO AVENUE

Good

Over: MD 295 B/W PARKWAY

0.2 MI W OF RTE 648, Baltimore city, MD

Built 1994 Load: 69.4 t ADT: 3,800

EAST STREET

Good

Over: CARROLL CREEK

JUST S. OF SOUTH STREET, Frederick, MD

Built 1999 Load: 69.4 t ADT: 15,334

BYRD ROAD

Good

Over: LITTLE ANNEMESSEX RIVER

0.2 MILES WEST OF MD 358, Somerset, MD

Built 1984 Load: 69.4 t ADT: 493

WEST CHAPEL ROAD

Good

Over: SWAN CREEK

0.6 MILES S OF MD 156, Harford, MD

Built 1930 Load: 69.7 t ADT: 365

IS 795 SBR

Good

Over: MD 940 RAMP 7

0.13 MILE NORTH OF MD 940, Baltimore, MD

Built 1985 Load: 69.8 t ADT: 68,761

HARRIS MILL ROAD

Good

Over: EBAUGHS CREEK

0.15 MI N OF BOND ROAD, Baltimore, MD

Built 2011 Load: 69.8 t ADT: 370

DURHAM ROAD

Good

Over: WEST BRANCH and WINTERS

0.01 MI E OF CHARLES ST, Harford, MD

Built 1995 Load: 69.8 t ADT: 1,770

GUILFORD ROAD

Good

Over: CSX TRANSPORTATION

ON ANNE ARUNDEL CO LINE, Howard, MD

Built 2008 Load: 69.8 t ADT: 13,485

MARYLAND 36

Good

Over: MOORES RUN ROAD

0.30 MILE NORTH OF MD 935, Allegany, MD

Built 1975 Load: 70.3 t ADT: 5,740

GV714 (MD 32)

Good

Over: CANINE ROAD

ENTRANCE TO N.S.A., Anne Arundel, MD

Built 2005 Load: 70.3 t ADT: 42,132

HORSESHOE ROAD

Good

Over: STONE RUN

0.91 MI N OF US 1, Cecil, MD

Built 2000 Load: 70.3 t ADT: 1,369

Showing 4,801-4,850 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.