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

MULLETT BRANCH ROA

Fair

Over: KINGS CREEK

0.5 MI SE OF MD 328, Talbot, MD

Built 1960 Load: 37.6 t ADT: 282

UNGER ROAD

Fair

Over: GROVE CREEK

0.5 MI SW OF LEIT SMITH R, Washington, MD

Built 1830 Load: 37.6 t ADT: 194

I-895 NB

Fair

Over: AMTRAK

Milepost M2.0, Baltimore, MD

Built 1957 Load: 37.6 t ADT: 7,507

I 95 SB RAMP S

Fair

Over: TO KEITH AVENUE

EX 56 RAMP TO KEITH AVE, Baltimore city, MD

Built 1982 Load: 37.6 t ADT: 3,726

IS 895

Fair

Over: CANTON RR

MILE POINT 11.9, Baltimore city, MD

Built 1957 Load: 37.6 t ADT: 66,448

I-695 IL

Fair

Over: CSXT

0.18 MI N OF CHEMICAL RD, Baltimore city, MD

Built 1975 Load: 37.6 t ADT: 21,765

MD 36

Fair

Over: NEFF RUN

2.57 MI S OF MD 55, Allegany, MD

Built 1939 Load: 38.1 t ADT: 6,750

IS 95 RAMP 5

Fair

Over: IS 195 NBR

0.79 MI N OF HOWARD CO, Baltimore, MD

Built 1970 Load: 38.1 t ADT: 8,984

IS 95 NBR

Fair

Over: OAKLAND ROAD

0.76 MILE NORTH OF IS 195, Baltimore, MD

Built 1969 Load: 38.1 t ADT: 176,796

MD 158

Fair

Over: MUD FLATS

1.44 MILE WEST OF MD 151, Baltimore, MD

Built 1976 Load: 38.1 t ADT: 12,161

MD 267

Fair

Over: AMTRAK

0.06 MILE EAST OF MD 7C, Cecil, MD

Built 1967 Load: 38.1 t ADT: 1,680

MD 77

Fair

Over: OWENS CREEK

0.02 MI W OF FRUSHOUR RD, Frederick, MD

Built 1932 Load: 38.1 t ADT: 3,131

MD 180

Fair

Over: CATOCTIN CREEK

0.55 MILE EAST OF MD 872, Frederick, MD

Built 1928 Load: 38.1 t ADT: 4,580

IS 70 WBR

Fair

Over: US 40 ALT

0.28 M E OF BR NO 1014500, Frederick, MD

Built 1967 Load: 38.1 t ADT: 74,920

MD 495

Fair

Over: IS 68/US 219

0.19 M N OF NORTH PARK RD, Garrett, MD

Built 1974 Load: 38.1 t ADT: 2,581

MD 108

Fair

Over: MIDDLE PATUXENT RIVER

2.02 MILES EAST OF MD 216, Howard, MD

Built 1985 Load: 38.1 t ADT: 19,870

MD 32 RAMP B(2)

Fair

Over: GUILDFORD ROAD

0.06 MILE SOUTH OF IS 95, Howard, MD

Built 1970 Load: 38.1 t ADT: 8,048

MD 445

Fair

Over: SWAN CREEK

2.92 MILES SOUTH OF MD 21, Kent, MD

Built 1929 Load: 38.1 t ADT: 780

MD 121

Fair

Over: LITTLE SENECA LAKE

0.39 MILE NORTH OF MD 117, Montgomery, MD

Built 1984 Load: 38.1 t ADT: 3,571

MD 927-MONTROSE RD

Fair

Over: IS 270 & C-D ROADS

1.36 MILES S OF MD 189, Montgomery, MD

Built 1988 Load: 38.1 t ADT: 10,211

IS 495

Fair

Over: Clara Barton Parkway EB

0.34 MILE EAST OF VA LINE, Montgomery, MD

Built 1963 Load: 38.1 t ADT: 228,218

IS 495

Fair

Over: CEDAR LANE

0.65 MILE EAST OF MD 355, Montgomery, MD

Built 1964 Load: 38.1 t ADT: 238,050

MD 201

Fair

Over: BRIER DITCH

0.11 MI N OF SARVIS AVE, Prince George's, MD

Built 1950 Load: 38.1 t ADT: 33,330

MD 202

Fair

Over: WESTERN BRANCH

0.79 MILE NORTH OF MD 193, Prince George's, MD

Built 1959 Load: 38.1 t ADT: 26,592

IS 495 RAMP F

Fair

Over: PAINT BRANCH

1.11 M E OF MONT CO LINE, Prince George's, MD

Built 1967 Load: 38.1 t ADT: 319

IS 95 RAMP F(1)

Fair

Over: MD 210

0.18 M S OF BR NO 1621900, Prince George's, MD

Built 1990 Load: 38.1 t ADT: 16,870

MD 34

Fair

Over: TRIB TO LIT ANTIETAM CRK

0.70 MILE WEST OF US 40AL, Washington, MD

Built 1957 Load: 38.1 t ADT: 6,981

MD 376

Fair

Over: AYERS CREEK

0.71 MILE WEST OF MD 611, Worcester, MD

Built 1967 Load: 38.1 t ADT: 4,122

SUSSEX ROAD

Fair

Over: TRIBUTARY TO GWYNNS FALL

0.07 MI N OF MD 26, Baltimore, MD

Built 1969 Load: 38.1 t ADT: 442

CENTRAL AVENUE

Fair

Over: HARFORD RUN

BETWEEN ALICEANNA & FLEET, Baltimore city, MD

Built 1960 Load: 38.1 t ADT: 3,900

NORTHERN PARKWAY

Fair

Over: CHINQUAPIN RUN

0.3 MI W OF THE ALAMEDA, Baltimore city, MD

Built 1974 Load: 38.1 t ADT: 16,640

BASIN RUN ROAD

Fair

Over: BASIN RUN

0.1 MI E OF DR JACK RD, Cecil, MD

Built 1900 Load: 38.1 t ADT: 165

JONES MILL ROAD

Fair

Over: ROCK CREEK

0.1 MI S FORSYTHE AVENUE, Montgomery, MD

Built 1969 Load: 38.1 t ADT: 14,669

DAYTON STREET

Fair

Over: TRIBUTARY TO SLIGO CREEK

825 FEET EAST OF MD 97, Montgomery, MD

Built 1965 Load: 38.1 t ADT: 830

LITTLE FALLS PARKW

Fair

Over: WILLET BRANCH

0.1 MI N DORSET AVE, Montgomery, MD

Built 1958 Load: 38.1 t ADT: 16,840

FLOWER AVENUE

Fair

Over: SLIGO CREEK

0.28 MI SE OF MONT CO, Montgomery, MD

Built 1930 Load: 38.1 t ADT: 1,774

TUCKER ROAD

Fair

Over: HENSON CREEK

0.35 MI N OF FERGUSON LA, Prince George's, MD

Built 1979 Load: 38.1 t ADT: 7,120

COVENTRY PARISH RO

Fair

Over: REHOBETH BRANCH

0.3 MI S OF REHOBETH ROAD, Somerset, MD

Built 1985 Load: 38.1 t ADT: 250

PEGG ROAD

Fair

Over: BRANCH JARBOESVILLE RUN

.8 MI CHANCELLORS RUN RD, St. Mary's, MD

Built 1990 Load: 38.1 t ADT: 9,574

MANOR CHURCH ROAD

Fair

Over: ANTIETAM CREEK

2.65 MI SE OF MD RTE 65, Washington, MD

Built 1982 Load: 38.1 t ADT: 365

TERMINAL ROAD

Fair

Over: SACHS BRANCH

BWI AIRPORT TERMINAL RD, Anne Arundel, MD

Built 2002 Load: 38.1 t ADT: 11,269

IS 68

Fair

Over: EVITTS CREEK

0.21 M E OF BR NO 0109900, Allegany, MD

Built 1937 Load: 38.5 t ADT: 26,680

MD 295 SB

Fair

Over: AMTRAK STONY RUN

0.14 MI S OF IS 195, Anne Arundel, MD

Built 1950 Load: 38.5 t ADT: 67,307

MD 7

Fair

Over: LITTLE GUNPOWDER FALLS

ON HARFORD CO LINE, Baltimore, MD

Built 1928 Load: 38.5 t ADT: 8,520

MD 128

Fair

Over: SLADE RUN

3.05 MI E OF MD 30, Baltimore, MD

Built 1990 Load: 38.5 t ADT: 2,991

RUXTON ROAD

Fair

Over: JONES FALLS

0.02 MI W OF MD 25, Baltimore, MD

Built 1961 Load: 38.5 t ADT: 5,329

IS 70 EBR

Fair

Over: ROLLING ROAD

0.54 MILE WEST OF IS 695, Baltimore, MD

Built 1964 Load: 38.5 t ADT: 94,221

MT. WILSON LANE

Fair

Over: GWYNNS FALLS

0.03 MI S OF MD 400, Baltimore, MD

Built 1973 Load: 38.5 t ADT: 1,800

SOLOMONS ISLAND RD

Fair

Over: THE NARROWS

ON SOLOMONS ISLAND, Calvert, MD

Built 1958 Load: 38.5 t ADT: 4,126

QUINN ROAD

Fair

Over: IS 70

0.39 MI N OR CO 377, Frederick, MD

Built 1985 Load: 38.5 t ADT: 792

Showing 1,301-1,350 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.