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

PICNIC WOODS ROAD

Good

Over: MIDDLE CREEK

0.6 MI S OF BIDLE ROAD, Frederick, MD

Built 1974 Load: 55.8 t ADT: 278

MARRIOTTSVILLE ROA

Good

Over: LITTLE PATUXENT RIVER

0.23 MILE NORTH OF IS 70, Howard, MD

Built 1967 Load: 55.8 t ADT: 2,616

UPPER LEVEL ROADWA

Good

Over: ELM ROAD

BWI AIRPORT RAMP A, Anne Arundel, MD

Built 1995 Load: 55.8 t ADT: 14,700

ODENTON TOWN CENTE

Good

Over: PICTURE SPRING BRANCH

0.3 MI SOUTH OF MD 32, Anne Arundel, MD

Built 2018 Load: 56.1 t ADT: 5,212

MD 948AF

Good

Over: IS 68

AT IS 68, Allegany, MD

Built 1990 Load: 56.2 t ADT: 221

MD 84

Good

Over: MEADOW BRANCH

1.24 MILE SOUTH OF MD 832, Carroll, MD

Built 2003 Load: 56.2 t ADT: 922

MD 140

Good

Over: CATTAIL BRANCH

0.74 MI N OF CARROLL CO, Frederick, MD

Built 1987 Load: 56.2 t ADT: 4,001

MD 136

Good

Over: JAMES RUN

1.6 MILES NORTH OF MD 543, Harford, MD

Built 2006 Load: 56.2 t ADT: 6,361

MD 202C

Good

Over: MD 214

2.08 MILES N OF MD 202, Prince George's, MD

Built 1993 Load: 56.2 t ADT: 3,930

MD 19

Good

Over: BEAVERDAM DITCH

0.43 MILE WEST OF MD 313, Queen Anne's, MD

Built 2006 Load: 56.2 t ADT: 1,532

IS 70 EB

Good

Over: PENNSYLVANIA AVE

0.24 MILE EAST OF US 522, Washington, MD

Built 1965 Load: 56.2 t ADT: 37,440

SOUTH DOLFIELD ROA

Good

Over: GWYNNS FALLS

0.3 M NW PAINTERS MILL RD, Baltimore, MD

Built 1965 Load: 56.2 t ADT: 8,948

CHARLES STREET

Good

Over: AMTRAK

0.2 MI N OF MT ROYAL AVE, Baltimore city, MD

Built 2003 Load: 56.2 t ADT: 20,304

HOOVER MILL ROAD

Good

Over: BIG PIPE CREEK

0.15 MI SW OF EBBVALE RD, Carroll, MD

Built 1984 Load: 56.2 t ADT: 35

LEGION ROAD

Good

Over: WATTS CREEK

0.5 MI SE OF DENTON, Caroline, MD

Built 2011 Load: 56.2 t ADT: 1,099

CLARKSBURG ROAD

Good

Over: LITTLE BENNETT CREEK

1.9 MI N OF MD 355, Montgomery, MD

Built 1998 Load: 56.2 t ADT: 2,934

I-95 NB

Good

Over: CAMPBELL ROAD

0.66 MI S OF MD RTE 43, Baltimore, MD

Built 1962 Load: 56.2 t ADT: 98,960

MD 200 (ICC) EB

Good

Over: Ramp NW

0.6 mi W of Briggs Chaney, Montgomery, MD

Built 2011 Load: 56.2 t ADT: 22,682

MD 665

Good

Over: RIVA ROAD

0.63 MILE WEST OF MD 2, Anne Arundel, MD

Built 1991 Load: 56.7 t ADT: 61,602

PROVIDENCE ROAD

Good

Over: IS 695

1.26 MI N OF MD 146, Baltimore, MD

Built 2001 Load: 56.7 t ADT: 10,140

US 15 SB

Good

Over: TUSCARORA CREEK

1/4 MI. N. OF MONOCACY BL, Frederick, MD

Built 1950 Load: 56.7 t ADT: 45,700

INDUSTRIAL DRIVE

Good

Over: IS 370

0.51 MI E OF IS 270, Montgomery, MD

Built 1989 Load: 56.7 t ADT: 999

IS 81 NB

Good

Over: MAUGANS AVE

1.89 MILES NORTH OF MD 58, Washington, MD

Built 1958 Load: 56.7 t ADT: 52,330

MARKET STREET

Good

Over: WMSRR

0.09 M S OF N MECHANIC ST, Allegany, MD

Built 1928 Load: 56.7 t ADT: 3,445

MCDANIEL ROAD

Good

Over: PINEY BRANCH

0.76 MI SE OF MD RTE 228, Charles, MD

Built 2015 Load: 56.7 t ADT: 542

SNAKE LANE

Good

Over: JAMES RUN

0.21 MI E OF MD 136, Harford, MD

Built 2019 Load: 56.7 t ADT: 529

TRIADELPHIA ROAD

Good

Over: MIDDLE PATUXENT RIVER

1.2 MI S OF MD RTE 144, Howard, MD

Built 1986 Load: 56.7 t ADT: 2,474

IS 195 RAMP D

Good

Over: AMTRAK STONY RUN

0.14 MI S OF IS 195, Anne Arundel, MD

Built 1990 Load: 57.1 t ADT: 5,631

US 1

Good

Over: LITTLE GUNPOWDER FALLS

ON HARFORD CO LINE, Baltimore, MD

Built 2010 Load: 57.1 t ADT: 22,152

MD 702

Good

Over: DEEP CREEK

0.68 MILE EAST OF MD 150, Baltimore, MD

Built 1989 Load: 57.1 t ADT: 27,871

MD 30

Good

Over: SHILOH ROAD

2.276 M S OF MD 482, Carroll, MD

Built 2007 Load: 57.1 t ADT: 9,200

BRIGGS CHANEY ROAD

Good

Over: US 29

AT US 29, Montgomery, MD

Built 2007 Load: 57.1 t ADT: 11,212

JERSEY ROAD

Good

Over: US 50

AT US 50, Wicomico, MD

Built 2001 Load: 57.1 t ADT: 5,130

CLARK ROAD

Good

Over: TRIBUTARY TO PINEY RUN

0.5 MI. W. OF RIDGE RD., Anne Arundel, MD

Built 2007 Load: 57.1 t ADT: 1,531

MOUNTVILLE ROAD

Good

Over: TUSCARORA CREEK

0.19 MI NE OF ADAMSTOWN R, Frederick, MD

Built 1989 Load: 57.1 t ADT: 3,284

S. COURT STREET

Good

Over: CARROLL CREEK

595 SOUTH OF MD 144, Frederick, MD

Built 1988 Load: 57.1 t ADT: 8,370

MONOCACY BOULEVARD

Good

Over: CARROLL CREEK

0.1 MI S OF E CHURCH ST, Frederick, MD

Built 2012 Load: 57.1 t ADT: 16,392

DAISY ROAD

Good

Over: CATTAIL CREEK

0.5 MI N UNION CHAPEL RD, Howard, MD

Built 2017 Load: 57.1 t ADT: 1,679

WHITES FERRY ROAD

Good

Over: BROAD RUN TRIBUTARY

2 MI W OF JCT SR 109, Montgomery, MD

Built 1998 Load: 57.1 t ADT: 1,999

DAHLGREN ROAD

Good

Over: PAINT BRANCH

GSA at White Oak MD. I-, Montgomery, MD

Built 2009 Load: 57.1 t ADT: 110

IS 95 NB & SB

Good

Over: DESOTO RD

Milepost M52.7, Baltimore city, MD

Built 1976 Load: 57.1 t ADT: 94,828

IS 83 NBR

Good

Over: NCR TRAIL & LITTLE FALLS

0.55 MILE SOUTH OF MD 45, Baltimore, MD

Built 2006 Load: 57.6 t ADT: 50,431

US 15 NBR

Good

Over: TUSCARORA CREEK

1/4 MI. N. OF MONOCACY BL, Frederick, MD

Built 1972 Load: 57.6 t ADT: 45,700

MD 100

Good

Over: OLD MONT. RD & DEEP RUN

0.62 MILE WEST OF MD 103, Howard, MD

Built 1998 Load: 57.6 t ADT: 82,092

MD 100

Good

Over: DORSEY STATION ACCESS RD

0.39 M W OF AA CO LINE, Howard, MD

Built 1996 Load: 57.6 t ADT: 83,402

MD 100

Good

Over: DORSEY STATION ACCESS RD

0.39 M W OF AA CO LINE, Howard, MD

Built 1996 Load: 57.6 t ADT: 83,402

IS 595 RAMP W-N(3)

Good

Over: IS 595 RAMP N-E(5)

MD 3 US 301 IS 595 INT, Prince George's, MD

Built 1992 Load: 57.6 t ADT: 14,577

MD 214 WB

Good

Over: MD 202

0.94 MILE EAST OF IS 95, Prince George's, MD

Built 1993 Load: 57.6 t ADT: 34,604

JUMPERS HOLE ROAD

Good

Over: TRIBUTARY TO MAGOTHY RIV

0.56 Mi SOUTH OF JCT RT 2, Anne Arundel, MD

Built 2001 Load: 57.6 t ADT: 11,903

MOUNT VISTA ROAD

Good

Over: BROAD RUN

0.35 MI E OF US ROUTE 1, Baltimore, MD

Built 1998 Load: 57.6 t ADT: 1,034

Showing 4,551-4,600 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.