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

HANOVER STREET

Fair

Over: PATAPSCO RIVER

1.3 MI S OF IS 95, Baltimore city, MD

Built 1973 Load: 39.5 t ADT: 27,673

NORTH TANNERY ROAD

Fair

Over: WEST BR PATAPSCO RIVER

0.8 MI W OF GORSUCH ROAD, Carroll, MD

Built 1974 Load: 39.5 t ADT: 200

PARK MILLS ROAD

Fair

Over: MONOCACY RIVER

1 MI N OF MD RTE 28, Frederick, MD

Built 1979 Load: 39.5 t ADT: 557

LONGS MILL ROAD

Fair

Over: OWENS CREEK

1.8 MI E OF MD 550, Frederick, MD

Built 1979 Load: 39.5 t ADT: 670

HARNEY ROAD

Fair

Over: MIDDLE CREEK

1.12 MI E OF EMMITSBURG, Frederick, MD

Built 1971 Load: 39.5 t ADT: 811

BONIFANT ROAD

Fair

Over: NORTHWEST BRANCH

0.6 MILES EAST OF MD 182, Montgomery, MD

Built 1971 Load: 39.5 t ADT: 34,277

I-895 SB

Fair

Over: AMTRAK

Milepost M2.0, Baltimore, MD

Built 1957 Load: 39.5 t ADT: 8,846

I-395 RAMP G

Fair

Over: MIDDLE BRANCH MTA CSX

Milepost 0.8, Baltimore city, MD

Built 1976 Load: 39.5 t ADT: 49,585

I-395 NB

Fair

Over: HAMBURG ST

Milepost 1.4, Baltimore city, MD

Built 1982 Load: 39.5 t ADT: 28,544

ERDMAN AVENUE WB

Fair

Over: I-895

Milepost M13.15, Baltimore city, MD

Built 1957 Load: 39.5 t ADT: 16,228

I-695 OL

Fair

Over: CHEMICAL ROAD

0.02 MI N OF MD RTE 173, Baltimore city, MD

Built 1972 Load: 39.5 t ADT: 23,169

MD 51

Fair

Over: SAWPIT RUN

0.48 M E OF PACK HORSE RD, Allegany, MD

Built 1932 Load: 39.9 t ADT: 2,142

IS 68 EBR

Fair

Over: MD 53

0.73 MI W OF MD 658, Allegany, MD

Built 1971 Load: 39.9 t ADT: 29,700

IS 695

Fair

Over: DOGWOOD ROAD

1.12 MILE NORTH OF IS 70, Baltimore, MD

Built 1961 Load: 39.9 t ADT: 203,902

MD 695 OL

Fair

Over: MD 695 RMP 1(MERRITT BL)

0.26 MILE SOUTH OF MD 151, Baltimore, MD

Built 1966 Load: 39.9 t ADT: 41,012

MD 695 RAMP 4F

Fair

Over: FORCE MAIN

0.19 MI E OF MD 695, Baltimore, MD

Built 1973 Load: 39.9 t ADT: 5,141

MD 806A

Fair

Over: LITTLE HUNTING CREEK

0.84 MILE NORTH OF US 15, Frederick, MD

Built 1927 Load: 39.9 t ADT: 1,072

MD 80

Fair

Over: MONOCACY RIVER

0.08 MILE EAST OF MD 880, Frederick, MD

Built 1973 Load: 39.9 t ADT: 4,472

HORINE ROAD

Fair

Over: US 340

1.85 MI E OF MD 180, Frederick, MD

Built 1965 Load: 39.9 t ADT: 148

US 15 SB

Fair

Over: FLAT RUN

0.2 MILE SOUTH OF MD 140, Frederick, MD

Built 1965 Load: 39.9 t ADT: 18,340

IS 95 NB

Fair

Over: CSX TRANSPORTATION

0.75 M N OF GUILFORD ROAD, Howard, MD

Built 1970 Load: 39.9 t ADT: 187,920

IS 95 SB

Fair

Over: CSX TRANSPORTATION

0.75 M N OF GUILFORD ROAD, Howard, MD

Built 1970 Load: 39.9 t ADT: 187,920

MD 410

Fair

Over: SLIGO CREEK

0.23 MILE WEST OF MD 212, Prince George's, MD

Built 1934 Load: 39.9 t ADT: 21,452

IS 595 WB

Fair

Over: MD 193

2.52 MILES EAST OF MD 704, Prince George's, MD

Built 1955 Load: 39.9 t ADT: 113,590

MD 212

Fair

Over: IS 95 LITTLE PAINT BR

1.9 MILES SOUTH OF US 1, Prince George's, MD

Built 1971 Load: 39.9 t ADT: 34,891

IS 68 EB

Fair

Over: CREEK RD

1.0 MILE WEST OF IS 70, Washington, MD

Built 1965 Load: 39.9 t ADT: 19,000

IS 70 WB

Fair

Over: GR TONOLOWAY CK CO RDS

0.67 MILE W OF MD 144WB, Washington, MD

Built 1965 Load: 39.9 t ADT: 39,222

ILCHESTER ROAD

Fair

Over: PATAPSCO RIVER

1.58 MI S OF MD RTE 144, Baltimore, MD

Built 1955 Load: 39.9 t ADT: 2,052

CORBETT ROAD

Fair

Over: CARROLL BRANCH

0.29 MI E OF CARROLL ROAD, Baltimore, MD

Built 1922 Load: 39.9 t ADT: 252

OWINGS MILLS BOULE

Fair

Over: GWYNNS FALLS

1 MI N OF MD 140, Baltimore, MD

Built 1989 Load: 39.9 t ADT: 29,343

CEDAR / WYMAN PARK

Fair

Over: I-83 AND MTA

0.2 MI N 29TH ST, Baltimore city, MD

Built 1961 Load: 39.9 t ADT: 28,326

WOODVILLE ROAD

Fair

Over: SWANSON CREEK

1 MI E WILKERSON ROAD, Charles, MD

Built 1934 Load: 39.9 t ADT: 1,383

NAYLORS MILL ROAD

Fair

Over: BIG PIPE CREEK

0.41 MI N OF MD 77, Carroll, MD

Built 1947 Load: 39.9 t ADT: 24

NINER ROAD

Fair

Over: SOUTH BRANCH MIDDLE RUN

0.59 MI N OF MD 32, Carroll, MD

Built 1974 Load: 39.9 t ADT: 756

OLD COLUMBIA PIKE

Fair

Over: TIBER HUDSON BRANCH

0.01 MI E OF MAIN STREET, Howard, MD

Built 1997 Load: 39.9 t ADT: 5,887

COLUMBIA ROAD

Fair

Over: RED HILL BRANCH

0.4 MI N OF MD RTE 108, Howard, MD

Built 1986 Load: 39.9 t ADT: 4,946

BERRYVILLE RD

Fair

Over: SENECA CREEK TRIB

1 MI N OF JCT SR 112, Montgomery, MD

Built 1930 Load: 39.9 t ADT: 821

GREENWAY DRIVE

Fair

Over: LITTLE FALLS BRANCH

0.1 MI SOUTH OF MD 190, Montgomery, MD

Built 1962 Load: 39.9 t ADT: 886

GEORGE WASHINGTON

Fair

Over: TRIBUTARY TO NORTH BRANC

.5 MI NORTH OF MD-200, Montgomery, MD

Built 1973 Load: 39.9 t ADT: 518

BEACH DRIVE

Fair

Over: ROCK CREEK

1.3 MI SOUTH OF MD 547, Montgomery, MD

Built 1962 Load: 39.9 t ADT: 8,611

AGER ROAD

Fair

Over: NORTHWEST BRANCH

0.73 MI N OF MD 500, Prince George's, MD

Built 1961 Load: 39.9 t ADT: 18,463

GALLAHAN ROAD

Fair

Over: TINKERS CREEK

0.59 MILES NORTH OF MD 22, Prince George's, MD

Built 1989 Load: 39.9 t ADT: 4,747

IS 95 NB

Fair

Over: MIDDLE BRANCH

0.6 MI. E. OF RUSSELL ST., Baltimore city, MD

Built 1979 Load: 39.9 t ADT: 60,992

US 40 EB OFF RAMP

Fair

Over: I-895 SB ON RAMP

MILEPOST M13.13, Baltimore city, MD

Built 1957 Load: 39.9 t ADT: 4,627

QUARANTINE ROAD

Fair

Over: I-695

0.74 MI N OF CHEMICAL RD, Baltimore city, MD

Built 1972 Load: 39.9 t ADT: 26,400

GREENBELT METRO DR

Fair

Over: WMATA RAILROAD

0.2 MI S OF I-95, Prince George's, MD

Built 1989 Load: 39.9 t ADT: 1,591

MD 935

Fair

Over: MOORES RUN

0.28 MI N OF MD 36, Allegany, MD

Built 1933 Load: 40.4 t ADT: 1,430

MD 53

Fair

Over: WARRIOR RUN

0.11 MILE SOUTH OF MD 636, Allegany, MD

Built 1953 Load: 40.4 t ADT: 12,872

ORLEANS ROAD

Fair

Over: IS 68

AT IS 68, Allegany, MD

Built 1968 Load: 40.4 t ADT: 2,113

IS 68

Fair

Over: KELLY BLVD CSX TRANS.

0.29 MI W OF KELLY RD, Allegany, MD

Built 1968 Load: 40.4 t ADT: 46,611

Showing 1,451-1,500 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.