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

MD 100

Good

Over: SNOWDEN RIVER PARKWAY

0.86 MILE WEST OF MD 103, Howard, MD

Built 1998 Load: 45.8 t ADT: 82,092

MD 100

Good

Over: SNOWDEN RIVER PARKWAY

0.86 MILE WEST OF MD 103, Howard, MD

Built 1997 Load: 45.8 t ADT: 82,092

MD 119

Good

Over: GUNNERS BR CSXT RR

.5 MI S OF MIDDLEBROOK RD, Montgomery, MD

Built 1987 Load: 45.8 t ADT: 6,955

DICUS MILL ROAD

Good

Over: SEVERN RUN

1.3 M E OF GAMBRILLS RD, Anne Arundel, MD

Built 2012 Load: 45.8 t ADT: 1,301

DORSEY ROAD

Good

Over: PINEY RUN

0.3 MI E OF MD ROUTE 295, Anne Arundel, MD

Built 2006 Load: 45.8 t ADT: 1,418

DAYSVILLE ROAD

Good

Over: CABBAGE RUN

0.8 MI EAST OF MD 194, Frederick, MD

Built 1975 Load: 45.8 t ADT: 1,619

HOLLY OAK CIRCLE

Good

Over: GRAYS RUN

0.1 MILES N OF MD 7, Harford, MD

Built 1999 Load: 45.8 t ADT: 173

ROGERS AVENUE

Good

Over: SUCKER BRANCH

0.4 MI N OF US RTE 40, Howard, MD

Built 1988 Load: 45.8 t ADT: 9,270

WAYNE AVENUE

Good

Over: SLIGO CREEK

AT MANCHESTER AVENUE, Montgomery, MD

Built 1960 Load: 45.8 t ADT: 19,450

PARKWOOD STREET

Good

Over: TRIBUTARY TO BEAVERDAM C

0.02 MI E OF GRAMBY ST, Prince George's, MD

Built 1995 Load: 45.8 t ADT: 2,024

54TH PLACE

Good

Over: STREAM

50 FT S. OF SPRING ST., Prince George's, MD

Built 1958 Load: 45.8 t ADT: 332

MD 63

Good

Over: ST JAMES RUN

AT N/S RAILROAD, Washington, MD

Built 2017 Load: 46.0 t ADT: 650

CEDAR KNOLL LANE

Good

Over: ELK LICK RUN

100 FEET SOUTH OF MD 144, Allegany, MD

Built 1966 Load: 46.3 t ADT: 50

IS 795 NBR

Good

Over: MD 940

0.62 M N OF BR NO 0336000, Baltimore, MD

Built 1985 Load: 46.3 t ADT: 68,761

MD 85

Good

Over: IS 70

AT IS 70, Frederick, MD

Built 2009 Load: 46.3 t ADT: 35,962

MD 4 EBR

Good

Over: PATUXENT RIVER

ON ANNE ARUNDEL CO LINE, Prince George's, MD

Built 1959 Load: 46.3 t ADT: 57,061

IS 95/IS 495 OL

Good

Over: LIVINGSTON ROAD

0.48 MILE NORTH OF MD 210, Prince George's, MD

Built 2008 Load: 46.3 t ADT: 57,732

IS 595 RAMP W-N(3)

Good

Over: US 301 RAMPS S-W & N-E

MD 3 US 301 IS 595 INT, Prince George's, MD

Built 1992 Load: 46.3 t ADT: 14,577

IS 70 WB

Good

Over: CSX TRANS.

0.18 MILE EAST OF MD 65, Washington, MD

Built 1968 Load: 46.3 t ADT: 60,800

US 13 SB

Good

Over: NORFOLK SOUTHERN RR

0.39 MILE NORTH OF MD 346, Wicomico, MD

Built 1972 Load: 46.3 t ADT: 36,390

CHRISTIE ROAD

Good

Over: EVITTS CREEK

1.04 MILES S OF MD 144AN, Allegany, MD

Built 1975 Load: 46.3 t ADT: 1,464

MARLYN AVENUE

Good

Over: DEEP CREEK

1.1 MI SE OF EASTERN BLVD, Baltimore, MD

Built 2008 Load: 46.3 t ADT: 10,248

WEST OSTEND STREET

Good

Over: MARC CSX

0.15 MI. NW. OF WASH. BLV, Baltimore city, MD

Built 1993 Load: 46.3 t ADT: 8,239

HOFFMAN MILL ROAD

Good

Over: TRIBUTARY EAST OF BRANCH

.91 MI W - HOUCKSVILLE RD, Carroll, MD

Built 1974 Load: 46.3 t ADT: 750

MORAVIA ROAD

Good

Over: I-895

Milepost M13.96, Baltimore city, MD

Built 2008 Load: 46.3 t ADT: 26,230

US 220

Good

Over: I-68 AND MD 144 RAMP

INTERSECTION WITH IS 68, Allegany, MD

Built 1999 Load: 46.7 t ADT: 3,841

IS 795 RAMP E

Good

Over: GWYNNS FALLS

0.15 MI N OF IS 695, Baltimore, MD

Built 1984 Load: 46.7 t ADT: 32,012

IS 370

Good

Over: MD 355

1.18 MILE EAST OF IS 270, Montgomery, MD

Built 1989 Load: 46.7 t ADT: 79,062

IS 595

Good

Over: IS 95

0.29 MILE EAST OF US 50, Prince George's, MD

Built 1958 Load: 46.7 t ADT: 153,970

MASON ROAD

Good

Over: PEA VINE RUN

0.06 MI N OF ZEMBOWER RD, Allegany, MD

Built 2004 Load: 46.7 t ADT: 1,275

GARLAND ROAD

Good

Over: GARLAND LAKE

0.5 MILES NORTH OF MD 317, Caroline, MD

Built 2017 Load: 46.7 t ADT: 1,452

FORD ROAD

Good

Over: CLIFFORD BRANCH

0.6 MI W OPPOSSUMTOWN PIK, Frederick, MD

Built 1980 Load: 46.7 t ADT: 414

FISH HATCHERY ROAD

Good

Over: BEAR CREEK

0.1 MI W OF PUD MILLER RD, Garrett, MD

Built 2007 Load: 46.7 t ADT: 65

BROKEN LAND PKWY

Good

Over: LITTLE PATUXENT RIVER

0.125 MI S OF MD RTE 32, Howard, MD

Built 1986 Load: 46.7 t ADT: 21,288

WATTS BRANCH PARKW

Good

Over: WATTS BRANCH

0.2 MI S OF HURLEY AVE, Montgomery, MD

Built 1970 Load: 46.7 t ADT: 3,704

MD 140

Good

Over: FLAT RUN

0.4 MI E OF EMMITSBURG, Frederick, MD

Built 2019 Load: 47.0 t ADT: 9,011

MD 948Y

Good

Over: IS 68

0.3 MI W OF WASHINGTON CO, Allegany, MD

Built 1988 Load: 47.2 t ADT: 99

MD 144

Good

Over: IS 68 PRATT HOLLOW

0.61 MI W OF US 40 SCN, Allegany, MD

Built 1990 Load: 47.2 t ADT: 1,121

FARM ROAD

Good

Over: IS 97

0.85 M N OF BR NO 0215400, Anne Arundel, MD

Built 1987 Load: 47.2 t ADT: 2

MD 10 NBR

Good

Over: MD 177

0.17 MI N OF MD 100, Anne Arundel, MD

Built 1988 Load: 47.2 t ADT: 43,170

MD 32 EBR

Good

Over: MD 170

1.54 MI S OF MD 175, Anne Arundel, MD

Built 1993 Load: 47.2 t ADT: 43,672

MD 193 EB

Good

Over: AMTRAK

0.1 MILE EAST OF MD 564, Prince George's, MD

Built 1986 Load: 47.2 t ADT: 17,728

IS 95/495 OLL RP A

Good

Over: RAMPS B T Q AND H

2.0 MILE WEST OF MD 210, Prince George's, MD

Built 2004 Load: 47.2 t ADT: 191,981

IS 70 EB

Good

Over: LITTLE CONOCOCHEAGUE CRE

1.34 MILES EAST OF MD 68, Washington, MD

Built 1965 Load: 47.2 t ADT: 40,770

MONROE ST RAMP EB

Good

Over: SERVICE ROAD

1.0 MI S OF RTE 1, Baltimore city, MD

Built 2006 Load: 47.2 t ADT: 15,441

BUCK LANTZ ROAD

Good

Over: OWENS CREEK

AT FOXVLLE DEERFLD RD INT, Frederick, MD

Built 1982 Load: 47.2 t ADT: 141

RAVEN ROCK PARK RD

Good

Over: OWENS CREEK

AT FOXVLLE DEERFLD RD INT, Frederick, MD

Built 1981 Load: 47.2 t ADT: 57

FISHERS HOLLOW RD

Good

Over: LITTLE CATOCTIN CREEK

AT HARMONY RD INT, Frederick, MD

Built 1983 Load: 47.2 t ADT: 337

FISH HATCHERY ROAD

Good

Over: BEAR CREEK

0.06 MI S RABBIT HOLLOW, Garrett, MD

Built 2006 Load: 47.2 t ADT: 65

NEAL ROAD

Good

Over: BIG BRANCH

0.3 MILE E OF ST PAULS RD, Harford, MD

Built 1950 Load: 47.2 t ADT: 60

Showing 4,201-4,250 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.