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

CORONA BAYARD ROAD

Fair

Over: NORTH BRANCH OF POTOMAC

ON WEST VIRGINIA LINE, Garrett, MD

Built 2013 Load: 49.4 t ADT: 96

JAMES RUN ROAD

Fair

Over: JAMES RUN

0.5 MILES E OF MD 136, Harford, MD

Built 1977 Load: 49.4 t ADT: 1,215

OAKLYN DRIVE

Fair

Over: ROCK RUN

1 MI SOUTH OF MD 189, Montgomery, MD

Built 1989 Load: 49.4 t ADT: 3,785

ROSSVILLE BLVD

Fair

Over: I-95

0.62 MI N OF IS 695, Baltimore, MD

Built 2005 Load: 49.4 t ADT: 23,316

I-895 SB

Fair

Over: MD 648

I-895 SB Milepost 4.9, Baltimore, MD

Built 1957 Load: 49.4 t ADT: 18,476

I-895

Fair

Over: FRANKFURST AVE

Milepost M7.9, Baltimore city, MD

Built 1957 Load: 49.4 t ADT: 74,587

MD 144

Fair

Over: IS 68

0.48 M W OF BR NO 0114600, Allegany, MD

Built 1990 Load: 49.9 t ADT: 1,121

HAMMONDS FERRY RD

Fair

Over: MD 295 NBR

0.53 MI S OF MD 168, Anne Arundel, MD

Built 1949 Load: 49.9 t ADT: 2,892

HAMMONDS FERRY ROA

Fair

Over: MD 295 SBR

0.3 MI S OF IS 695, Anne Arundel, MD

Built 1949 Load: 49.9 t ADT: 2,892

US 1

Fair

Over: PATAPSCO RIVER

ON HOWARD CO LINE, Baltimore, MD

Built 1915 Load: 49.9 t ADT: 25,532

IS 195 NBR

Fair

Over: CSX TRANSPORTATION

0.26 MILE NORTH OF US 1, Baltimore, MD

Built 1972 Load: 49.9 t ADT: 41,831

MD 4 NB

Fair

Over: LYONS CREEK

ON ANNE ARUNDEL CO LINE, Calvert, MD

Built 1987 Load: 49.9 t ADT: 46,661

IS 68/US 219 EB

Fair

Over: CASSELMAN RIVER

1.08 MILE EAST OF MD 495, Garrett, MD

Built 1975 Load: 49.9 t ADT: 17,770

IS 68/US 219 WB

Fair

Over: CASSELMAN RIVER

1.08 MILE EAST OF MD 495, Garrett, MD

Built 1975 Load: 49.9 t ADT: 17,770

MD 24 SBR

Fair

Over: US 40

0.35 MILE NORTH OF MD 755, Harford, MD

Built 1967 Load: 49.9 t ADT: 20,242

US 29 SB

Fair

Over: LITTLE PATUXENT RIVER

1.62 MILES S OF MD 175, Howard, MD

Built 1950 Load: 49.9 t ADT: 73,292

MD 410

Fair

Over: ROCK CREEK

0.55 MILE EAST OF MD 186, Montgomery, MD

Built 1974 Load: 49.9 t ADT: 26,931

MD 704

Fair

Over: IS 95

0.79 MILE WEST OF IS 595, Prince George's, MD

Built 1964 Load: 49.9 t ADT: 29,090

MD 210 RAMP B

Fair

Over: IS95/IS495 ILE OLL MD414

0.3 M E OF IS 95/ IS 495, Prince George's, MD

Built 2008 Load: 49.9 t ADT: 16,871

IS 70 EB

Fair

Over: IS 81

0.33 MILE WEST OF US 11, Washington, MD

Built 1964 Load: 49.9 t ADT: 62,680

IS 68 WB

Fair

Over: IS 70 EBR IS 68 RAMP D

3.78 MILES E OF MD 144WB, Washington, MD

Built 1965 Load: 49.9 t ADT: 19,780

UPPER POTOMAC INDU

Fair

Over: CSXT RAILROAD

0.08 MI E OF US 220, Allegany, MD

Built 1975 Load: 49.9 t ADT: 120

MANNASOTA AVENUE

Fair

Over: HERRING RUN

0.6 MI W ERDMAN AVE, Baltimore city, MD

Built 1928 Load: 49.9 t ADT: 2,933

WALNUT STREET

Fair

Over: STONE RUN

0.59 MI N OF MD 273, Cecil, MD

Built 1991 Load: 49.9 t ADT: 2,197

SMALLWOOD DRIVE EB

Fair

Over: CSX TRANSPORTATION

0.25 mi E MD RTE 925, Charles, MD

Built 1966 Load: 49.9 t ADT: 13,201

N. BENTZ STREET

Fair

Over: CARROLL CREEK

365 NORTH OF MD 144, Frederick, MD

Built 1992 Load: 49.9 t ADT: 7,250

BUTTERMILK ROAD

Fair

Over: TRIB / BIG BRANCH

0.6 MILES N OF W HEAPS RD, Harford, MD

Built 1978 Load: 49.9 t ADT: 86

OLD PYLESVILLE RD

Fair

Over: TRIB / JACKS HOLE

0.2 MILES NE OF MD 165, Harford, MD

Built 1997 Load: 49.9 t ADT: 541

HALL STREET

Fair

Over: HEAVENLY WATERS

0.4 MILES SW OF MD 924, Harford, MD

Built 1999 Load: 49.9 t ADT: 113

TOWN & COUNTRY BOU

Fair

Over: SUCKER BRANCH

0.05 MI OF RODGERS AVE, Howard, MD

Built 1966 Load: 49.9 t ADT: 10,030

EDMONSTON DRIVE

Fair

Over: CSXT RR & WMATA METRO

0.05 MILES EAST OF MD 355, Montgomery, MD

Built 1981 Load: 49.9 t ADT: 10,524

MOUNT AETNA ROAD

Fair

Over: ANTIETAM CREEK

0.8 MI W OF US RTE 40, Washington, MD

Built 1980 Load: 49.9 t ADT: 7,260

IS 895

Fair

Over: MTA LIGHT RAIL

Milepost 5.2, Baltimore, MD

Built 1957 Load: 49.9 t ADT: 36,977

IS 95 RAMP B

Fair

Over: WB MCCOMAS ST

0.15 MI N OF HANOVER ST, Baltimore city, MD

Built 1982 Load: 49.9 t ADT: 7,909

I-95

Fair

Over: JAMES RUN

6.9 MI N BALT-HAR CO LINE, Harford, MD

Built 1963 Load: 49.9 t ADT: 130,492

MD 952

Fair

Over: IS 68

0.03 MI S OF MD 952A, Allegany, MD

Built 1962 Load: 50.3 t ADT: 99

MD 144

Fair

Over: ELK LICK CREEK

0.62 M E OF BR NO 0115400, Allegany, MD

Built 1960 Load: 50.3 t ADT: 1,121

IS 68 RAMP B(6)

Fair

Over: HOWARD STREET

0.44 MI E OF US 48H, Allegany, MD

Built 1968 Load: 50.3 t ADT: 13,342

MD 170

Fair

Over: SEVERN RUN

1.2 MILE NORTH OF MD 175, Anne Arundel, MD

Built 1936 Load: 50.3 t ADT: 21,621

MD 258

Fair

Over: MD 4

0.08 MILE WEST OF MD 794, Anne Arundel, MD

Built 1961 Load: 50.3 t ADT: 7,962

MD 648E

Fair

Over: MD 10

0.22 MI N OF MD 270, Anne Arundel, MD

Built 1976 Load: 50.3 t ADT: 10,890

MD 100R (WB&A RD)

Fair

Over: MD 100

1.5 MI W OF IS 97, Anne Arundel, MD

Built 1995 Load: 50.3 t ADT: 4,131

MD 25

Fair

Over: MTA LIGHT RAIL JONES FA

0.5 MI N OF NORTHERN PKWY, Baltimore, MD

Built 1992 Load: 50.3 t ADT: 13,551

DOWNES ROAD

Fair

Over: IS 83

1.52 MI S OF MD 439, Baltimore, MD

Built 1958 Load: 50.3 t ADT: 600

MD 145 (PAPER MILL

Fair

Over: GUNPOWDER FALLS

1.7 MI. E. OF YORK ROAD, Baltimore, MD

Built 2000 Load: 50.3 t ADT: 10,100

MD 24 SB

Fair

Over: OTTERS POINT CREEK

0.1 MILE NORTH OF US 40, Harford, MD

Built 1967 Load: 50.3 t ADT: 20,242

US 29 NB

Fair

Over: IS 70 RAMP G(7)

0.68 MILE SOUTH OF MD 99, Howard, MD

Built 1966 Load: 50.3 t ADT: 21,083

MD 32 EB

Fair

Over: US 29

3.22 MILES NORTH OF IS 95, Howard, MD

Built 1980 Load: 50.3 t ADT: 61,442

MD 32 WB

Fair

Over: US 29

3.22 MILES NORTH OF IS 95, Howard, MD

Built 1980 Load: 50.3 t ADT: 61,442

MD 32 EB

Fair

Over: US 1

1.50 MILES N OF AA CO, Howard, MD

Built 1983 Load: 50.3 t ADT: 80,612

Showing 2,251-2,300 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.