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

IS 95 NB

Fair

Over: B & O RR

0.25 MI S OF PULASKI HWY, Baltimore city, MD

Built 1972 Load: 48.5 t ADT: 64,059

I-95

Fair

Over: NORTHEAST CREEK

Milepost M100.3, Cecil, MD

Built 1963 Load: 48.5 t ADT: 78,625

OLD MOUNTAIN RD

Fair

Over: I-95

Milepost M74.2, Harford, MD

Built 1963 Load: 48.5 t ADT: 1,521

US 220

Fair

Over: WARRIOR RUN

0.16 MILE NORTH OF MD 636, Allegany, MD

Built 1900 Load: 49.0 t ADT: 15,191

MD 175

Fair

Over: AMTRAK

0.37 MILE NORTH OF MD 170, Anne Arundel, MD

Built 1938 Load: 49.0 t ADT: 28,180

IS 83 NBR

Fair

Over: THORNTON MILL ROAD

0.9 M S OF BR NO 0305500, Baltimore, MD

Built 1953 Load: 49.0 t ADT: 60,263

IS 70 RAMP H

Fair

Over: IS 695 RAMP J

0.39 MI N OF IS 70, Baltimore, MD

Built 1965 Load: 49.0 t ADT: 39,171

IS 95 NBR

Fair

Over: CARVILLE & OREGON AVENUE

0.14 MILE SOUTH OF US 1, Baltimore, MD

Built 1970 Load: 49.0 t ADT: 176,796

IS 795 & RAMP 4

Fair

Over: IS 795 RAMP 10

0.62 MILE SOUTH OF MD 940, Baltimore, MD

Built 1983 Load: 49.0 t ADT: 110,982

US 15 NBR

Fair

Over: ROSEMONT AVE

0.77 MILE NORTH OF US 40, Frederick, MD

Built 1958 Load: 49.0 t ADT: 93,930

MD 17

Fair

Over: US 340

0.15 MILE NORTH OF MD 180, Frederick, MD

Built 1964 Load: 49.0 t ADT: 2,061

IS 70 WBR

Fair

Over: HOLLOW ROAD

0.1 M W OF RIDGE ROAD, Frederick, MD

Built 1968 Load: 49.0 t ADT: 68,230

US 40

Fair

Over: CHURCH CREEK

1.24 MILES WEST OF MD 7, Harford, MD

Built 1935 Load: 49.0 t ADT: 25,930

IS 70 EB

Fair

Over: IS 70 RAMP G(7)

0.23 MILE EAST OF US 29, Howard, MD

Built 1966 Load: 49.0 t ADT: 94,221

IS 95 SB

Fair

Over: MIDDLE PATUXENT RIVER

0.18 MILE NORTH OF IS 95I, Howard, MD

Built 1970 Load: 49.0 t ADT: 186,750

GROSVENOR LANE

Fair

Over: IS 270

0.27 MILE NORTH OF I-495, Montgomery, MD

Built 1958 Load: 49.0 t ADT: 4,422

IS 95 OL

Fair

Over: MD 193

0.34 MILE NORTH OF MD 295, Prince George's, MD

Built 1963 Load: 49.0 t ADT: 220,640

FENWICK STREET

Fair

Over: TOWN RUN

0.3 MILE NORTH OF MD 5, St. Mary's, MD

Built 1955 Load: 49.0 t ADT: 7,918

MD 333

Fair

Over: TRED AVON RIVER

0.12 MILE SOUTH OF MD 322, Talbot, MD

Built 1955 Load: 49.0 t ADT: 8,882

MD 62

Fair

Over: LITTLE ANTIETAM CREEK

0.626 MILE SOUTH OF MD 60, Washington, MD

Built 1931 Load: 49.0 t ADT: 2,080

ROBBIN STREET

Fair

Over: JACKSON RUN

0.05 MI E OF JACKSON ST, Allegany, MD

Built 1946 Load: 49.0 t ADT: 338

REAMES ROAD

Fair

Over: TRIBUTARY TO WHITE MARSH

.2 MI EAST OF US RTE 40, Baltimore, MD

Built 1950 Load: 49.0 t ADT: 1,900

HILTON STREET

Fair

Over: AMTRAK

AT FREDERICK AVE JCT, Baltimore city, MD

Built 1955 Load: 49.0 t ADT: 29,811

TUCKER ROAD

Fair

Over: TRIB TO HENSON CREEK

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

Built 1978 Load: 49.0 t ADT: 7,075

EAST SWAN CREEK RO

Fair

Over: CLASH CREEK

0.42 MI W OF MD 210, Prince George's, MD

Built 1989 Load: 49.0 t ADT: 13,440

HAINES POINT ROAD

Fair

Over: TRIB OF UPPER THOROFARE

AT HARRISON POINT ROAD, Somerset, MD

Built 1986 Load: 49.0 t ADT: 81

UNGER ROAD

Fair

Over: GROVE CREEK

0.2 MI N OLD FORGE RD, Washington, MD

Built 1908 Load: 49.0 t ADT: 498

I-95 NB COLLECTOR

Fair

Over: DESOTO ROAD

Milepost M52.4, Baltimore city, MD

Built 1976 Load: 49.0 t ADT: 11,209

I-95 RAMP P

Fair

Over: VACANT LOT / WETLANDS

Milepost M56.4, Baltimore city, MD

Built 1977 Load: 49.0 t ADT: 5,273

CLARA BARTON PARKW

Fair

Over: RIVERSIDE DRIVE

0.7 MILES SOUTH OF I-495;, Montgomery, MD

Built 1961 Load: 49.0 t ADT: 16,120

RIDGE ROAD

Fair

Over: MD 295 NBR

2.94 MI N OF MD 176, Anne Arundel, MD

Built 1950 Load: 49.4 t ADT: 1,100

IS 97 SBR

Fair

Over: MD 3 BUSINESS

1.19 MILE SOUTH OF MD 174, Anne Arundel, MD

Built 1990 Load: 49.4 t ADT: 135,900

MD 174

Fair

Over: AMTRAK

0.71 MILE SOUTH OF MD 170, Anne Arundel, MD

Built 1931 Load: 49.4 t ADT: 19,339

MD 100 WBR

Fair

Over: MD 2

0.16 W OF BR NO 0208000, Anne Arundel, MD

Built 1963 Load: 49.4 t ADT: 12,651

MD 100M (COCA-COLA

Fair

Over: DEEP RUN

HOWARD COUNTY LINE, Anne Arundel, MD

Built 1996 Load: 49.4 t ADT: 9,784

RIDGE ROAD

Fair

Over: MD 295 SBR

0.46 MI S OF IS 195, Anne Arundel, MD

Built 1950 Load: 49.4 t ADT: 1,100

MD 43 & RAMP N

Fair

Over: CSX TRANSPORTATION

0.08 MILE WEST OF US 40, Baltimore, MD

Built 1963 Load: 49.4 t ADT: 22,608

IS 95 SBR

Fair

Over: CARVILLE & OREGON AVENUE

0.14 MILE SOUTH OF US 1, Baltimore, MD

Built 1970 Load: 49.4 t ADT: 176,796

BERRYMANS LANE

Fair

Over: IS 795

0.43 MI W OF MD 140, Baltimore, MD

Built 1985 Load: 49.4 t ADT: 3,054

IS 70 EB

Fair

Over: MD 27

0.03 MI E OF FREDERICK CO, Carroll, MD

Built 1974 Load: 49.4 t ADT: 65,550

IS 70 WB

Fair

Over: MD 27

0.03 MI E OF FREDERICK CO, Carroll, MD

Built 1974 Load: 49.4 t ADT: 65,550

MD 482

Fair

Over: CSX TRANSPORTATION

0.151 MILE WEST OF MD 20, Carroll, MD

Built 1982 Load: 49.4 t ADT: 8,632

MD 854B

Fair

Over: MORGAN RUN

3.63 MILE SOUTH OF MD 32, Carroll, MD

Built 1983 Load: 49.4 t ADT: 1,970

IS 70 EBR

Fair

Over: MT TABOR ROAD

1.15 MILES WEST OF MD 17, Frederick, MD

Built 1968 Load: 49.4 t ADT: 71,007

MD 140

Fair

Over: US 15

0.16 MI S OF MD 904F, Frederick, MD

Built 1971 Load: 49.4 t ADT: 9,010

US 1 NB

Fair

Over: LITTLE PATUXENT RIVER

0.38 MILE SOUTH OF MD 32, Howard, MD

Built 1955 Load: 49.4 t ADT: 19,773

MD 108 EB

Fair

Over: US 29

0.36 MILE WEST OF MD 108H, Howard, MD

Built 1986 Load: 49.4 t ADT: 19,880

MD 355

Fair

Over: LITTLE SENECA CREEK

1.44 MILES NORTH OF MD 27, Montgomery, MD

Built 1922 Load: 49.4 t ADT: 13,820

MD 459

Fair

Over: US 50

0.42 MILE S OF MD 973B, Prince George's, MD

Built 1962 Load: 49.4 t ADT: 19,801

SEMINARY AVENUE

Fair

Over: LONG QUARTER BRANCH

0.08 MI W OF MD 146, Baltimore, MD

Built 1953 Load: 49.4 t ADT: 7,400

Showing 2,201-2,250 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.