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

IS 97 RAMP W

Fair

Over: IS 97

0.28 MI S OF IS 895, Anne Arundel, MD

Built 1989 Load: 53.5 t ADT: 84,179

MARLEY STATION ROA

Fair

Over: MD 10

0.3 MILE EAST OF MD 2, Anne Arundel, MD

Built 1988 Load: 53.5 t ADT: 8,520

MD 75

Fair

Over: BENNETT CREEK

1.62 MILES N OF MD 355, Frederick, MD

Built 1974 Load: 53.5 t ADT: 7,952

US 15 SBR

Fair

Over: MD 26

0.15 MILE NORTH OF MD 26, Frederick, MD

Built 1968 Load: 53.5 t ADT: 42,640

MD 715

Fair

Over: US 40

2 MILES WEST OF MD 22, Harford, MD

Built 1985 Load: 53.5 t ADT: 11,583

IS 70 WB

Fair

Over: TRANS CONT PIPE LINE

0.35 MILE EAST OF US 40, Howard, MD

Built 1968 Load: 53.5 t ADT: 67,990

MD 650

Fair

Over: SLIGO CREEK

0.43 MILE NORTH OF MD 410, Montgomery, MD

Built 1935 Load: 53.5 t ADT: 33,100

MD 185

Fair

Over: ROCK CREEK

0.13 MILE NORTH OF IS 495, Montgomery, MD

Built 1957 Load: 53.5 t ADT: 44,232

IS 270

Fair

Over: WEST OLD BALTIMORE RD

1.28 MILES S OF MD 121, Montgomery, MD

Built 1954 Load: 53.5 t ADT: 98,097

IS 95 RAMP D(2)

Fair

Over: BR OF SOUTHWEST BR

0.05 MILE NORTH OF MD 214, Prince George's, MD

Built 1964 Load: 53.5 t ADT: 6,658

MD 244

Fair

Over: POPLAR HILL CREEK

0.16 M W OF TOWER HILL RD, St. Mary's, MD

Built 1938 Load: 53.5 t ADT: 2,517

MD 237

Fair

Over: JARBOESVILLE RUN

0.53 MILE NORTH OF MD 246, St. Mary's, MD

Built 2009 Load: 53.5 t ADT: 17,352

US 11

Fair

Over: POTOMAC RIVER CSX TRANS

ON WEST VIRGINIA ST LINE, Washington, MD

Built 1909 Load: 53.5 t ADT: 6,761

ON RAMP 29TH STREE

Fair

Over: I-83 NB

29TH ST AT I-83, Baltimore city, MD

Built 1959 Load: 53.5 t ADT: 19,035

GREEN MILL ROAD

Fair

Over: BEAVER RUN

1.02 MILES SW OF MD 140, Carroll, MD

Built 1976 Load: 53.5 t ADT: 1,291

STILL POND CREEK R

Fair

Over: STILL POND CREEK

0.01MI S BESSICKS CRNR RD, Kent, MD

Built 1988 Load: 53.5 t ADT: 282

DEEP BRANCH RD

Fair

Over: TYASKIN CREEK

0.3 MI E WETIPQUIN RD, Wicomico, MD

Built 1997 Load: 53.5 t ADT: 602

I-395 SPUR NB

Fair

Over: HAMBURG ST & RR

Milepost M4.0, Baltimore city, MD

Built 1982 Load: 53.5 t ADT: 21,446

BW PARKWAY (NBL)

Fair

Over: MD ROUTE 197 (WBL)

1.8 MILES NORTH OF MD ROU, Prince George's, MD

Built 2001 Load: 53.5 t ADT: 88,000

IS 695 IL

Fair

Over: IS 97

0.63 MI S OF MD 648E, Anne Arundel, MD

Built 1957 Load: 54.0 t ADT: 92,102

MD 2 RAMP 8

Fair

Over: BOULTERS WAY

1.38 MI E OF MD 783, Anne Arundel, MD

Built 1953 Load: 54.0 t ADT: 20,393

MD 173

Fair

Over: ROCK CREEK

0.68 MILE NORTH OF MD 607, Anne Arundel, MD

Built 1932 Load: 54.0 t ADT: 9,150

US 40

Fair

Over: REDHOUSE CREEK

0.65 MI E OF MD 7, Baltimore, MD

Built 1935 Load: 54.0 t ADT: 37,450

IS 795 SBR

Fair

Over: GWYNNS FALLS

0.32 MILE NORTH OF IS 695, Baltimore, MD

Built 1984 Load: 54.0 t ADT: 110,982

MD 26

Fair

Over: LIBERTY RESERVOIR

1.04 M W OF BALTO CO LINE, Carroll, MD

Built 1954 Load: 54.0 t ADT: 20,192

IS 70 EBR & RAMP L

Fair

Over: IS 270

0.09 M W OF BR NO 1012200, Frederick, MD

Built 1955 Load: 54.0 t ADT: 83,731

US 40

Fair

Over: Little Patuxent River

0.49 M W OF DOGWOOD DRIVE, Howard, MD

Built 1939 Load: 54.0 t ADT: 50,111

IS 495 SE RAMP

Fair

Over: CLARA BARTON PKY & CANAL

0.39 MI E OF VA LINE, Montgomery, MD

Built 1963 Load: 54.0 t ADT: 7,021

MD 410

Fair

Over: NORTHEAST BRANCH

0.29 MILE WEST OF MD 201, Prince George's, MD

Built 1967 Load: 54.0 t ADT: 37,792

MD 5 NB

Fair

Over: MD 414

0.37 MILE N OF MD 967B, Prince George's, MD

Built 1970 Load: 54.0 t ADT: 49,752

MD 5 SB

Fair

Over: MD 414

0.37 MILE N OF MD 967B, Prince George's, MD

Built 1970 Load: 54.0 t ADT: 49,752

MD 353

Fair

Over: BURNT MILL BRANCH

1.90 MILES N OF MD 346, Wicomico, MD

Built 1934 Load: 54.0 t ADT: 4,162

WOODCOCK HOLLOW RD

Fair

Over: JENNINGS RUN

0.03 MI S OF MD 36, Allegany, MD

Built 1973 Load: 54.0 t ADT: 88

ESSEX ROAD

Fair

Over: GWYNNS FALLS

0.1 MI N LIBERTY RD, Baltimore, MD

Built 1963 Load: 54.0 t ADT: 7,029

LONGNECKER ROAD

Fair

Over: TRIBUTARY TO SLADE RUN

0.56 MI ON LONGNECKER RD, Baltimore, MD

Built 1920 Load: 54.0 t ADT: 325

ECHODALE AVENUE

Fair

Over: HERRING RUN

0.2 MI E PERRING PKWY, Baltimore city, MD

Built 1940 Load: 54.0 t ADT: 47,118

HIPSLEY MILL ROAD

Fair

Over: PATUXENT RIVER

1.8 MILES NORTH OF MD 650, Montgomery, MD

Built 1973 Load: 54.0 t ADT: 675

PROPHET ACRES ROAD

Fair

Over: TRIBUTARY OF MARSH RUN

0.01 MI NORTH OF RT 63, Washington, MD

Built 2005 Load: 54.0 t ADT: 84

Briggs Chaney Road

Fair

Over: MD 200 (ICC)

0.75 MI E OF US 29, Montgomery, MD

Built 2011 Load: 54.0 t ADT: 18,193

MD 36

Fair

Over: GEORGES CREEK

1.2 MI N OF MD 657, Allegany, MD

Built 2005 Load: 54.4 t ADT: 7,706

MD 648H (WATERFORD

Fair

Over: MD 100 WBR

0.68 MILE SOUTH OF MD 177, Anne Arundel, MD

Built 1971 Load: 54.4 t ADT: 5,802

MD 150

Fair

Over: MD 700

0.55 MI W OF MD 587, Baltimore, MD

Built 1942 Load: 54.4 t ADT: 35,131

IS 70 RAMP B EB

Fair

Over: IS 695

2.89 MI E OF HOWARD CO, Baltimore, MD

Built 1966 Load: 54.4 t ADT: 25,300

IS 70 RAMP F WB

Fair

Over: IS 695

2.89 MI E OF HOWARD CO, Baltimore, MD

Built 1966 Load: 54.4 t ADT: 25,300

MD 43

Fair

Over: CSX TRANSPORTATION

0.08 MILE WEST OF US 40, Baltimore, MD

Built 1963 Load: 54.4 t ADT: 24,493

IS 795 SBR RAMP

Fair

Over: PAINTERS MILL RD GWYNNS

0.67 MI S OF MD 140, Baltimore, MD

Built 1985 Load: 54.4 t ADT: 110,982

MD 715 EB

Fair

Over: AMTRAK

0.51 MILE EAST OF US 40, Harford, MD

Built 1943 Load: 54.4 t ADT: 8,627

MD 715 WB

Fair

Over: AMTRAK

0.51 MILE EAST OF US 40, Harford, MD

Built 1943 Load: 54.4 t ADT: 8,626

MD 23

Fair

Over: PHILLIPS MILL RD & E. BR

1.97 MILES S OF MD 165, Harford, MD

Built 1961 Load: 54.4 t ADT: 11,602

MD 175

Fair

Over: CSX RR

ON ANNE ARUNDEL CO LINE, Howard, MD

Built 1942 Load: 54.4 t ADT: 19,272

Showing 2,451-2,500 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.