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 6

Fair

Over: LOCKS SWAMP CREEK

0.1 M W OF LAUREL VIEW LN, St. Mary's, MD

Built 1930 Load: 44.0 t ADT: 1,951

MD 33

Fair

Over: OAK CREEK

0.64 MILE EAST OF MD 329, Talbot, MD

Built 1965 Load: 44.0 t ADT: 15,421

IS 70 EB CD

Fair

Over: IS 81

0.35 MI W OF US 11, Washington, MD

Built 1964 Load: 44.0 t ADT: 6,988

MD 513

Fair

Over: US 13

0.37 M S OF ST LUKES ROAD, Wicomico, MD

Built 1981 Load: 44.0 t ADT: 7,990

US 113 NB

Fair

Over: PILCHARD CREEK

0.68 MILE N OF MD 756, Worcester, MD

Built 1912 Load: 44.0 t ADT: 5,662

BRAND AVE

Fair

Over: JONES FALLS

0.03 MI N COLD SPRING LA, Baltimore city, MD

Built 1973 Load: 44.0 t ADT: 140

KEYSVILLE-FREDERIC

Fair

Over: MONOCACY RIVER

ON FRED CO LINE, Carroll, MD

Built 1900 Load: 44.0 t ADT: 260

PROVINCIAL PARKWAY

Fair

Over: FLAT RUN

AT N SETON AVE INTERSECTN, Frederick, MD

Built 1991 Load: 44.0 t ADT: 953

BROOKS DRIVE

Fair

Over: OXON RUN

0.18 MILES NORTH OF MD 4, Prince George's, MD

Built 1965 Load: 44.0 t ADT: 16,037

BLANCO ROAD

Fair

Over: ANDOVER BRANCH

0.8 MI E BOLTON WOODS RD, Queen Anne's, MD

Built 1994 Load: 44.0 t ADT: 676

HARRISON ROAD

Fair

Over: TRAPPE CREEK

0.07 MI S OF MD 376, Worcester, MD

Built 2005 Load: 44.0 t ADT: 313

IS 95 RAMP D

Fair

Over: MIDDLE BR LIGHT RAIL

0.6 MI E RUSSELL ST, Baltimore city, MD

Built 1979 Load: 44.0 t ADT: 15,504

MD 316

Fair

Over: I-95

Milepost M107.8, Cecil, MD

Built 1963 Load: 44.0 t ADT: 5,326

US 1

Fair

Over: AMMENDALE BRANCH

154 S of Ammendale Road, Prince George's, MD

Built 2016 Load: 44.1 t ADT: 32,400

US 220

Fair

Over: MD 135A

0.43 MI N OF MD 135B, Allegany, MD

Built 1952 Load: 44.4 t ADT: 7,111

IS 68

Fair

Over: MD 658

0.73 MILE EAST OF MD 53, Allegany, MD

Built 1968 Load: 44.4 t ADT: 38,810

MD 100 WBR

Fair

Over: JUMPERS HOLE ROAD

0.67 MILE EAST OF MD 2, Anne Arundel, MD

Built 1971 Load: 44.4 t ADT: 26,792

MD 100 EBR

Fair

Over: MD 713

1.04 MILES N OF MD 295, Anne Arundel, MD

Built 1995 Load: 44.4 t ADT: 74,302

MD 100 RAMP 2

Fair

Over: MD 100 RAMP A

IS 97 SB TO MD 100 EB, Anne Arundel, MD

Built 1996 Load: 44.4 t ADT: 43,587

MD 179-CP ST CL RD

Fair

Over: US 50/US 301

2.31 MI W OF MD 908D, Anne Arundel, MD

Built 1991 Load: 44.4 t ADT: 3,682

US 40

Fair

Over: CSX TRANSPORTATION

0.45 MI W OF MD 700, Baltimore, MD

Built 1990 Load: 44.4 t ADT: 47,120

IS 695 RAMP 2

Fair

Over: WHITEMARSH BRANCH

0.02 MI N OF MD 147, Baltimore, MD

Built 1961 Load: 44.4 t ADT: 8,511

MD 702 WBR

Fair

Over: AMTRAK & 695 RMP 7

0.20 MI E OF MD 695, Baltimore, MD

Built 1972 Load: 44.4 t ADT: 19,406

MD 702 WBR

Fair

Over: FORCE MAIN

0.03 MILE EAST OF MD 695, Baltimore, MD

Built 1972 Load: 44.4 t ADT: 19,406

MARLYN AVENUE

Fair

Over: MD 702

0.69 MI N OF MD 150, Baltimore, MD

Built 1973 Load: 44.4 t ADT: 7,687

MD 695 OL

Fair

Over: NORFOLK SOUTHERN RR MORS

0.26 MILE NORTH OF US 1, Baltimore, MD

Built 1974 Load: 44.4 t ADT: 34,762

MD 43

Fair

Over: BRANCH OF WHITEMARSH RUN

1.04 MILE WEST OF IS 95, Baltimore, MD

Built 1990 Load: 44.4 t ADT: 29,352

MD 272

Fair

Over: CSX TRANS.

0.7 MILE NORTH OF US 40, Cecil, MD

Built 1941 Load: 44.4 t ADT: 22,632

MD 140

Fair

Over: MIDDLE CREEK

0.72 MI S OF MD 904G, Frederick, MD

Built 1932 Load: 44.4 t ADT: 4,480

IS 70 EBR

Fair

Over: OLD NATIONAL PIKE

3.71 MILE WEST OF MD 75, Frederick, MD

Built 1985 Load: 44.4 t ADT: 59,922

MD 946

Fair

Over: US 40 ALT

0.46 MILE SOUTH OF MD 546, Garrett, MD

Built 1956 Load: 44.4 t ADT: 760

US 29 NB

Fair

Over: MIDDLE PATUXENT RIVER

1.05 MILES SOUTH OF MD 32, Howard, MD

Built 1951 Load: 44.4 t ADT: 52,913

MONTGOMERY ROAD

Fair

Over: IS 95

1.01 MI S OF IS 895, Howard, MD

Built 1969 Load: 44.4 t ADT: 6,764

MARRIOTTSVILLE RD

Fair

Over: IS 70

0.91 MI E OF US 40, Howard, MD

Built 1968 Load: 44.4 t ADT: 18,047

US 29 NB

Fair

Over: PAINT BRANCH

0.87 MILE NORTH OF MD 650, Montgomery, MD

Built 1957 Load: 44.4 t ADT: 66,948

US 29 SB

Fair

Over: PAINT BRANCH

0.87 MILE NORTH OF MD 650, Montgomery, MD

Built 1957 Load: 44.4 t ADT: 66,948

IS 495 RAMP F(1)

Fair

Over: IS 495

2.19 MILE NORTH OF MD 193, Montgomery, MD

Built 1964 Load: 44.4 t ADT: 5,541

MD 218

Fair

Over: OXON RUN

0.15 MI E OF WASH DC LINE, Prince George's, MD

Built 1941 Load: 44.4 t ADT: 9,011

MD 4 EBR

Fair

Over: MD 717

0.65 MILE NORTH OF US 301, Prince George's, MD

Built 1959 Load: 44.4 t ADT: 46,652

MD 144WB

Fair

Over: TONOLOWAY CREEK

0.69 MILE WEST OF IS 70, Washington, MD

Built 1940 Load: 44.4 t ADT: 8,201

IS 70 WB

Fair

Over: IS 81

0.33 MILE WEST OF US 11, Washington, MD

Built 1964 Load: 44.4 t ADT: 62,680

BLUE MOUNT ROAD

Fair

Over: LITTLE FALLS

1.7 MI E OF MONKTON ROAD, Baltimore, MD

Built 1995 Load: 44.4 t ADT: 854

BEACONSFIELD DRIVE

Fair

Over: BRANCH OF WHITE MARSH RU

0.1 MI E. HONEYGO BLVD., Baltimore, MD

Built 1986 Load: 44.4 t ADT: 9,681

CHANEYVILLE ROAD

Fair

Over: GRAHAM CREEK

0.35 MI N OF MD 262, Calvert, MD

Built 2009 Load: 44.4 t ADT: 433

TUCKAHOE ROAD

Fair

Over: TRIBUTARY TO TUCKAHOE CR

2.5 MILES SOUTH OF MD 404, Caroline, MD

Built 2003 Load: 44.4 t ADT: 805

GREEN ROAD

Fair

Over: TRIB OF DEER CREEK

0.02 M E OF LONG CORNER R, Harford, MD

Built 1999 Load: 44.4 t ADT: 170

SNOWDEN RIVER PARK

Fair

Over: ROBERT FULTON DRIVE

1.0 MI S OF MD RTE 175, Howard, MD

Built 1975 Load: 44.4 t ADT: 35,944

IS 95 NB

Fair

Over: MTA LIGHT RAIL AND STORA

MTA LGTRail&Storage Yard, Baltimore city, MD

Built 1977 Load: 44.4 t ADT: 49,255

IS 95 SB

Fair

Over: MIDDLE BRANCH

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

Built 1979 Load: 44.4 t ADT: 68,141

IS 70 EB

Fair

Over: CSX TRANS.

0.18 MILE EAST OF MD 65, Washington, MD

Built 1968 Load: 44.7 t ADT: 60,800

Showing 1,851-1,900 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.