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)

Counties (24)

Allegany 245 Anne Arundel 389 Baltimore 783 Baltimore city 374 Calvert 33 Caroline 70 Carroll 205 Cecil 193 Charles 94 Dorchester 47 Frederick 486 Garrett 139 Harford 275 Howard 309 Kent 44 Montgomery 515 Prince George's 576 Queen Anne's 88 Somerset 46 St. Mary's 50 Talbot 42 Washington 300 Wicomico 99 Worcester 82

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.

WASHINGTON STREET

Poor

Over: CSXT RAILROAD

0.2 MI W OF CUMBERLAND ST, Allegany, MD

Built 1930 Load: 0.0 t ADT: 110

CUMBERLAND STREET

Poor

Over: CSXT RAILROAD

0.6 MI E OF WASHINGTON ST, Allegany, MD

Built 1929 Load: 0.0 t ADT: 110

MILL STREET

Poor

Over: ROCK RUN

.01 MI S. OF RACE STREET, Cecil, MD

Built 1940 Load: 0.0 t ADT: 100

BACK LANDING ROAD

Poor

Over: HUNTING CREEK

ON CAROLINE COUNTY LINE, Dorchester, MD

Built 1941 Load: 0.0 t

TALBOT AVENUE

Poor

Over: CSXT RAILROAD

0.2 MI E OF MICHIGAN AVE, Montgomery, MD

Built 1918 Load: 0.0 t ADT: 1,430

TAYLOR MILL ROAD

Poor

Over: OLD MILL STREAM BRANCH

0.7 MILE EAST OF MD 213, Queen Anne's, MD

Built 1955 Load: 0.0 t ADT: 100

All Bridges in Maryland

KELBAUGH ROAD

Good

Over: LITTLE OWENS CREEK

AT SMITH ROAD INTERSECTN, Frederick, MD

Built 1974 Load: 99.9 t ADT: 392

WARD KLINE ROAD

Good

Over: LITTLE CATOCTIN CREEK

JUST EAST OF EASTERDAY RD, Frederick, MD

Built 1981 Load: 99.9 t ADT: 138

EASTERDAY ROAD

Good

Over: LITTLE CATOCTIN CREEK

1.25 MI N OF US RTE 40, Frederick, MD

Built 1982 Load: 99.9 t ADT: 196

MONUMENT ROAD

Good

Over: GRINDSTONE RUN

0.87 MI WEST OF MD 17, Frederick, MD

Built 1977 Load: 99.9 t ADT: 421

MOUNT TABOR ROAD

Good

Over: TRIB. OF CATOCTIN CREEK

0.2 MI N OF MILT SUMMERS, Frederick, MD

Built 1995 Load: 99.9 t ADT: 220

MONUMENT ROAD

Good

Over: GRINDSTONE RUN

1.35 MI WEST OF MD 17, Frederick, MD

Built 1977 Load: 99.9 t ADT: 311

GOOD INTENT ROAD

Good

Over: BEAVER DAM CREEK

AT WACHTER RD INTERSECTN, Frederick, MD

Built 1972 Load: 99.9 t ADT: 616

BUNKER HILL ROAD

Good

Over: BEAVER DAM CREEK

AT WACHTER RD INTERSECTN, Frederick, MD

Built 1962 Load: 99.9 t ADT: 212

WOODVILLE ROAD

Good

Over: SOUTH FORK LINGANORE CRK

0.5 MI S OF HARRISVILLE R, Frederick, MD

Built 1972 Load: 99.9 t ADT: 909

MARKER ROAD

Good

Over: MIDDLE CREEK

0.2 MI N OF BIDLE ROAD, Frederick, MD

Built 2008 Load: 99.9 t ADT: 246

PICNIC WOODS ROAD

Good

Over: BROAD RUN

0.5 MI N OF MD RTE 17, Frederick, MD

Built 1974 Load: 99.9 t ADT: 466

PICNIC WOODS ROAD

Good

Over: BROAD RUN

0.4 MI S OF MD RTE 17, Frederick, MD

Built 1974 Load: 99.9 t ADT: 403

CAP STINE ROAD

Good

Over: TUSCARORA CREEK

0.2 MI NE OF MANOR WOODS, Frederick, MD

Built 1985 Load: 99.9 t ADT: 451

WYE CREEK DRIVE

Good

Over: TRIBUTARY OF RENN

0.3 MI NORTH OF MD RT 180, Frederick, MD

Built 1960 Load: 99.9 t ADT: 50

MOUNT PHILLIP ROAD

Good

Over: BALLENGER CREEK

1 MI. SW OF OLD CAMP ROAD, Frederick, MD

Built 1975 Load: 99.9 t ADT: 1,913

WORMANS MILL COURT

Good

Over: TRIBUTARY NO. 10

700 FEET NW OF MD 355, Frederick, MD

Built 1986 Load: 99.9 t ADT: 1,615

MONOCACY BOULEVARD

Good

Over: PARK BRANCH

2.0 MI EAST OF MD 355, Frederick, MD

Built 2018 Load: 99.9 t ADT: 11,825

JAMES RUN ROAD

Good

Over: BROAD RUN

0.3 MILES E OF MD 136, Harford, MD

Built 1960 Load: 99.9 t ADT: 1,265

JOPPA FARM ROAD

Good

Over: FOSTER BRANCH

1.9 MILES E OF US 40, Harford, MD

Built 1997 Load: 99.9 t ADT: 15,650

WAGNER WAY

Good

Over: BYNUM RUN

0.2 MILES E OF MD 24, Harford, MD

Built 2001 Load: 99.9 t ADT: 732

TOLLGATE ROAD

Good

Over: TRIB / WINTERS RUN

500 FT N OF MONTROSE WAY, Harford, MD

Built 2003 Load: 99.9 t ADT: 736

MONTROSE WAY

Good

Over: TRIB / WINTERS RUN

0.2 MILES W OF TOLLGATE R, Harford, MD

Built 2005 Load: 99.9 t ADT: 58

MONTROSE WAY

Good

Over: TRIB / WINTERS RUN

0.9 MILES W OF TOLLGATE R, Harford, MD

Built 2005 Load: 99.9 t ADT: 58

KALMIA ROAD

Good

Over: TRIB / DEER CREEK

0.61 MILES W OF US RTE. 1, Harford, MD

Built 1970 Load: 99.9 t ADT: 287

WEST MACPHAIL ROAD

Good

Over: PLUMTREE RUN

0.2 MILES SW OF MD 24, Harford, MD

Built 1999 Load: 99.9 t ADT: 1,723

HIPSLEY MILL ROAD

Good

Over: CABIN BRANCH

0.4 MI E OF ELLICOTT ROAD, Howard, MD

Built 2003 Load: 99.9 t ADT: 421

CENTENNIAL LANE

Good

Over: BRANCH OF LITTLE PATUXEN

0.3 MI S OF FREDERICK RD, Howard, MD

Built 1992 Load: 99.9 t ADT: 13,080

AMBERWOODS WAY

Good

Over: TRIB S BR PATAPSCO RIVER

2000 FT. WEST OF MD 32, Howard, MD

Built 2000 Load: 99.9 t ADT: 30

RED DAHLIA DRIVE

Good

Over: UNNAMED STREAM

800 S of Old Frederick R, Howard, MD

Built 1995 Load: 99.9 t ADT: 20

BIG BRANCH DRIVE

Good

Over: TRIB TO TRIADELPHIA RES

1/4 MI S OF HOWARD RD, Howard, MD

Built 2000 Load: 99.9 t ADT: 50

ELIOTS OAK ROAD

Good

Over: TRIB TO WILDE LAKE

1/8 MI S OF MD 108, Howard, MD

Built 1972 Load: 99.9 t ADT: 100

SUNNY SPRING

Good

Over: TRIB TO LITTLE PATUXENT

500 N of Owen Brown Rd, Howard, MD

Built 1972 Load: 99.9 t ADT: 100

BRAMPTON PARKWAY

Good

Over: UNNAMED STREAM

1000 S of MD 103, Howard, MD

Built 1972 Load: 99.9 t ADT: 150

WETHERED DR

Good

Over: UNNAMED STREAM

500 W OF EXECUTIVE PARK, Howard, MD

Built 2000 Load: 99.9 t ADT: 30

PEBBLE CREEK DRIVE

Good

Over: UNNAMED STREAM

300 W OF DEBORAH JEAN DR, Howard, MD

Built 1998 Load: 99.9 t ADT: 25

TIBER FALLS DRIVE

Good

Over: TIBER BRANCH

500 NW OF OLD COLUMBIA P, Howard, MD

Built 2000 Load: 99.9 t ADT: 50

TOWN SQUARE PARKWA

Good

Over: LITTLE PATUXENT RIVER

1300 FT S OF RESORT RD, Howard, MD

Built 2015 Load: 99.9 t

PERKINS HILL ROAD

Good

Over: MORGAN CREEK

0.3 MI SE OF MD RTE 213, Kent, MD

Built 1975 Load: 99.9 t ADT: 266

LONGDRAFT ROAD

Good

Over: LONG DRAUGHT BRANCH

0.4 MI N OF GREAT SENECA, Montgomery, MD

Built 1977 Load: 99.9 t ADT: 3,200

REDLAND ROAD

Good

Over: CRABBS CREEK

0.7 MILES EAST OF MD 355, Montgomery, MD

Built 1981 Load: 99.9 t ADT: 25,649

MONTGOMERY VILLAGE

Good

Over: NORTH CREEK

2.8 MI NORTH OF MD 355, Montgomery, MD

Built 1972 Load: 99.9 t ADT: 31,432

SAM EIG HIGHWAY

Good

Over: TRIBUTARY TO MUDDY BRANC

1 MI E OF MUDDY BRANCH RD, Montgomery, MD

Built 1991 Load: 99.9 t ADT: 34,100

RANWORTH DRIVE

Good

Over: TRIBUTARY TO LITTLE SENE

0.5 MI N OF MD RTE 117, Montgomery, MD

Built 1994 Load: 99.9 t ADT: 150

WICKHAM ROAD

Good

Over: ROCK CRK NORTH BRANCH TR

N OF BOWIE MILL ROAD, Montgomery, MD

Built 2002 Load: 99.9 t ADT: 684

WICKHAM ROAD

Good

Over: TRIB. TO ROCK CREEK N. B

N OF BOWIE MILL ROAD, Montgomery, MD

Built 2002 Load: 99.9 t ADT: 376

OLD BALTIMORE ROAD

Good

Over: JAMES CREEK

1.2 MI. N. OF MD 108, Montgomery, MD

Built 1998 Load: 99.9 t ADT: 3,623

FDA BOULEVARD

Good

Over: TRIBUTARY TO PAINT BRANC

.4 MI W OF CHERRY HILL RD, Montgomery, MD

Built 2010 Load: 99.9 t ADT: 2,710

WISCONSIN AVENUE

Good

Over: BETHESDA METRO PED. TUNN

70 FT SOUTH OF MD 410, Montgomery, MD

Built 1984 Load: 99.9 t ADT: 40,769

EDISON PARK DRIVE

Good

Over: TRUCK LOADING DOCKS

0.4 MI NORTH OF MD 28, Montgomery, MD

Built 1968 Load: 99.9 t ADT: 130

SNOWDEN FARM PARKW

Good

Over: LITTLE SENECA CREEK

N. OF FREDERICK ROAD, Montgomery, MD

Built 2011 Load: 99.9 t ADT: 6,303

Showing 5,151-5,200 of 5,484 bridges

Related

All states → | National rankings → | Understanding conditions → | Retired SD term explained →
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.

Understanding Bridge Conditions

How FHWA rates bridge condition on a 0-9 scale.

Check Your Daily Bridges

How to look up bridge condition data for bridges on your route.

Read our methodology — how this data is sourced, computed, and verified.

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.