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

ARGONNE DRIVE

Good

Over: HERRING RUN

0.2 MI W HARFORD RD, Baltimore city, MD

Built 1958 Load: 51.2 t ADT: 12,687

BARON STREET

Good

Over: UNNAMED TRIBUTARY

KINGSVIEW SUBDIVISION, Charles, MD

Built 2008 Load: 51.2 t ADT: 230

BIDLE ROAD

Good

Over: CATOCTIN CREEK

0.5 MI SOUTH OF ALT US 40, Frederick, MD

Built 2009 Load: 51.2 t ADT: 650

SIXES ROAD

Good

Over: TOMS CREEK

0.4 MI SOUTH OF GRIMES RD, Frederick, MD

Built 2006 Load: 51.2 t ADT: 60

ALLEN LINTON BLVD

Good

Over: TRIBUTARY OF BALLENGER C

W OF BALLENGER CREEK PIKE, Frederick, MD

Built 2008 Load: 51.2 t ADT: 585

MANDEVILLE ROAD

Good

Over: TRIBUTARY TO LITTLE GUNP

0.3 MILES N OF MD 7, Harford, MD

Built 1985 Load: 51.2 t ADT: 101

KNIGHTS BRIDGE RD

Good

Over: HAMMONDS BRANCH

0.2 MI S OF GORMAN RD, Howard, MD

Built 1992 Load: 51.2 t ADT: 1,230

MOUNT OAK ROAD

Good

Over: COLLINGTON BRANCH

1.2 MILES WEST OF US 301, Prince George's, MD

Built 2008 Load: 51.2 t ADT: 12,050

NEW BRIDGE ROAD

Good

Over: LITTLE MILL CREEK

0.38 MI EAST OF MD 371, Worcester, MD

Built 2001 Load: 51.2 t ADT: 125

CHERRIX ROAD

Good

Over: BOXIRON CREEK

2.54 MI SE OF MD 12, Worcester, MD

Built 2003 Load: 51.2 t ADT: 225

COWENTON AVE

Good

Over: I-95

Milepost M67.9, Baltimore, MD

Built 2005 Load: 51.2 t ADT: 7,325

I-895

Good

Over: PATAPSCO RIVER FLATS

I-895 Mileposts 5.3-5.9, Baltimore, MD

Built 1957 Load: 51.2 t ADT: 36,977

MD 140 WB & RAMP B

Good

Over: MD 97

0.35 MILE SOUTH OF MD 31, Carroll, MD

Built 2006 Load: 51.7 t ADT: 47,060

HOUCKSVILLE ROAD

Good

Over: MD 30

HOUCKSVILLE RD OVER MD 30, Carroll, MD

Built 2007 Load: 51.7 t ADT: 4,844

US 50 EB

Good

Over: MD 331 & DP & L RR

.82 M W OF WICOMICO CO LN, Dorchester, MD

Built 1990 Load: 51.7 t ADT: 24,661

US 50 WB

Good

Over: MD 331 & DP & L RR

.82 M W OF WICOMICO CO LN, Dorchester, MD

Built 1990 Load: 51.7 t ADT: 24,661

NEW DESIGN ROAD

Good

Over: IS 270

1.03 MI N OF MD 85, Frederick, MD

Built 2001 Load: 51.7 t ADT: 16,733

LONG GREEN PIKE

Good

Over: LONG GREEN CREEK

0.03 MI S OF LONG GRN RD, Baltimore, MD

Built 2008 Load: 51.7 t ADT: 2,117

MCDONOGH ROAD

Good

Over: HORSEHEAD BRANCH

1.55 MI N. OF RT. 26, Baltimore, MD

Built 1986 Load: 51.7 t ADT: 35,560

CHERRY HILL ROAD

Good

Over: CSX GWYNNS FALLS

1.1 MI E. OF MD 140, Baltimore, MD

Built 2011 Load: 51.7 t ADT: 8,084

CRELLIN UNDERWOOD

Good

Over: SNOWY CREEK

0.1 MI W INT CRELLIN ST R, Garrett, MD

Built 2009 Load: 51.7 t ADT: 700

AMMENDALE ROAD

Good

Over: INDIAN CREEK

1.0 MILE WEST OF US 1, Prince George's, MD

Built 2001 Load: 51.7 t ADT: 23,965

MD 43

Good

Over: I-95 Ramps G & H

3.2mi N of I-695/I-95, Baltimore, MD

Built 2013 Load: 51.7 t ADT: 31,500

MD 200 (ICC) EB

Good

Over: Bonifant Road & NW Branc

2.07 Mi. West of MD650, Montgomery, MD

Built 2010 Load: 51.7 t ADT: 32,786

FENNO ROAD

Good

Over: MATAPONI CREEK

.3 MI S ST THOMAS CHUR RD, Prince George's, MD

Built 2011 Load: 51.8 t ADT: 80

SPRECHER ROAD

Good

Over: MARSH RUN

0.68 MI S OF BAKERSVILLE, Washington, MD

Built 1920 Load: 51.8 t ADT: 347

SPRECHER ROAD

Good

Over: MARSH RUN

0.07 MI S OF BAKERSVILLE, Washington, MD

Built 1986 Load: 51.8 t ADT: 380

HAWKINS ROAD

Good

Over: IS 97

AT IS 97, Anne Arundel, MD

Built 1987 Load: 52.2 t ADT: 322

I-83

Good

Over: PADONIA ROAD

1.42 M N OF TIMONIUM ROAD, Baltimore, MD

Built 2022 Load: 52.2 t ADT: 131,750

MD 695

Good

Over: CSX RAILROAD

0.05 MI E OF US 40, Baltimore, MD

Built 1995 Load: 52.2 t ADT: 96,082

IS 270 RAMP A 1

Good

Over: IS 270 RAMP B

AT I-270/I-270 SPUR SPLIT, Montgomery, MD

Built 1995 Load: 52.2 t ADT: 10,196

IS 95/IS 495 RMP R

Good

Over: RAMP Q

I-295 S Ramp to I-95/495, Prince George's, MD

Built 2003 Load: 52.2 t ADT: 97,959

IS 68 WB

Good

Over: MD 903

1.54 M E OF ALLEGANY CO, Washington, MD

Built 1984 Load: 52.2 t ADT: 19,950

DOVER ROAD

Good

Over: CSX RAILROAD

0.1 MI E HANOVER PIKE, Baltimore, MD

Built 2007 Load: 52.2 t ADT: 985

MOUNT ZION ROAD

Good

Over: TRIBUTARY TO PINEY RUN

0.3 MI N OF DOVER ROAD, Baltimore, MD

Built 2007 Load: 52.2 t ADT: 200

KEENEY MILL ROAD

Good

Over: LITTLE FALLS

0.8 MI NE OF MIDDLETOWN R, Baltimore, MD

Built 2005 Load: 52.2 t ADT: 340

OLD TELEGRAPH ROAD

Good

Over: SANDY BRANCH

0.05 MI S OF MIDDLE N RD, Cecil, MD

Built 1965 Load: 52.2 t ADT: 361

PINEY CREEK ROAD

Good

Over: ALLOWAY CREEK

.7 M N OF BOWERS ROAD, Carroll, MD

Built 1900 Load: 52.2 t ADT: 234

CEDAR LANE

Good

Over: MIDDLE PATUXENT RIVER

.02 Mi N of MD 32, Howard, MD

Built 1994 Load: 52.2 t ADT: 17,121

I95 SB-CD

Good

Over: MD200 Ramp I-B

1.6 miles south of MD198, Prince George's, MD

Built 2011 Load: 52.2 t ADT: 9,103

MONOCACY BOULEVARD

Good

Over: US 15

1 MI N OF MD 26, Frederick, MD

Built 2018 Load: 52.5 t ADT: 5,800

NEW CUT ROAD

Good

Over: UNNAMED TRIBUTARY TO SEV

.7 MI S OF ROUTE 3, Anne Arundel, MD

Built 2020 Load: 52.5 t ADT: 13,571

WILDLIFE LOOP ROAD

Good

Over: LITTLE PATUXENT RIVER

NORTH TRACT, Anne Arundel, MD

Built 2004 Load: 52.6 t ADT: 20

MD 100 WBR

Good

Over: STONY RUN

0.5 MI W OF MD 170, Anne Arundel, MD

Built 1995 Load: 52.6 t ADT: 74,302

IS 795 RAMP 9 SB

Good

Over: MD 940 RAMP 7

0.28 MI S OF MD 940, Baltimore, MD

Built 1985 Load: 52.6 t ADT: 7,469

MD 100 EBR

Good

Over: US 29 NBR

0.24 MILE SOUTH OF MD 103, Howard, MD

Built 1992 Load: 52.6 t ADT: 75,332

MD 175 WBR

Good

Over: SNOWDEN RIVER PARKWAY

0.84 MILE WEST OF MD 108, Howard, MD

Built 2001 Load: 52.6 t ADT: 32,168

US 29 SBR

Good

Over: MD 198

1.53 M S OF HOWARD CO LNE, Montgomery, MD

Built 2002 Load: 52.6 t ADT: 49,203

OLD GUNPOWDER RD

Good

Over: IS 95

1.0 MI N OF MD 200, Prince George's, MD

Built 2011 Load: 52.6 t ADT: 11,819

MEDICAL PARKWAY

Good

Over: COWHIDE BRANCH

ANNE ARUNDEL MEDICAL PARK, Anne Arundel, MD

Built 2002 Load: 52.6 t ADT: 8,484

Showing 4,401-4,450 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.