State profile · Below national median SD

Maryland bridge safety

Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Maryland — drawn straight from the FHWA National Bridge Inventory.

5,527
Public bridges
25.9%
Good condition
4.3%
Poor condition
4.3%
Structurally deficient

Total Bridges

5,527

Public highway bridges in Maryland

Good Condition

25.9%

1,432 bridges rated 7-9

-24.1pp vs 50% benchmark

Poor Condition

4.3%

236 bridges rated 0-4

Structurally Deficient

4.3%

236 bridges flagged for repair priority

-2.7pp vs national avg 7.0%

Maryland vs national bridge condition

Maryland — Good condition share 25.9%
National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

Maryland — Structurally deficient share 14.2%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.

Maryland vs nearby ranks

Adjacent states on the structurally deficient leaderboard (lower share = better)

States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below Maryland on the same metric.

09

Connecticut

3.95% top marginal rate
Structure
Progressive
Burden @ $100K
$4,277

47

Tennessee

3.97% top marginal rate
Structure
Progressive
Burden @ $100K
$20,426
Selected

24

Maryland

4.27% top marginal rate
Structure
Progressive
Burden @ $100K
$5,527

08

Colorado

4.32% top marginal rate
Structure
Progressive
Burden @ $100K
$8,965

41

Oregon

4.46% top marginal rate
Structure
Progressive
Burden @ $100K
$8,310

Bridges Needing Most Attention in Maryland

Six lowest-condition bridges in Maryland, ranked by composite NBI rating. Each is inspected at least every 24 months.

All Bridges in Maryland

BOLLINGER ROAD

Good

Over: STONY BRANCH

1.7 MILES NORTH OF MD 76, Frederick, MD

Built 1982 Load: 67.1 t ADT: 72

MT. TABOR ROAD

Good

Over: GRINDSTONE RUN

AT MONUMENT RD INTERSECTN, Frederick, MD

Built 1982 Load: 67.1 t ADT: 304

STULLTOWN ROAD

Good

Over: ANDOVER BRANCH

2.8 MI. NE JCT MD 300, Queen Anne's, MD

Built 1988 Load: 67.1 t ADT: 221

MD 151B (Wharf Roa

Good

Over: Warehouse Road and Trade

0.4 Mi. S. of MD 158, Baltimore, MD

Built 2022 Load: 67.4 t ADT: 12,750

VALLEY ROAD

Good

Over: BOOZE CREEK

40 FT E OF FALLEN OAK RD, Montgomery, MD

Built 1964 Load: 67.4 t ADT: 216

GUN ROAD

Good

Over: PATAPSCO RIVER

PATAPSCO VALLEY ST PARK, Baltimore, MD

Built 1975 Load: 67.6 t ADT: 110

MACTON ROAD

Good

Over: TRIB / BROAD CREEK

0.31 MI SW OF MD 136, Harford, MD

Built 2014 Load: 67.6 t ADT: 212

OAKINGTON ROAD

Good

Over: GASHEYS CREEK

0.8 MILES S OF MD 132, Harford, MD

Built 1993 Load: 67.6 t ADT: 1,330

MD 25

Good

Over: GEORGES RUN

1.36 MI N OF MD 137, Baltimore, MD

Built 2015 Load: 67.7 t ADT: 4,400

GOLD MINE ROAD

Good

Over: HAWLINGS RIVER

0.4 MILES WEST OF MD 650, Montgomery, MD

Built 2019 Load: 67.7 t ADT: 2,792

MD 496

Good

Over: BIG PIPE CREEK

3.52 MILEI WEST OF MD 30, Carroll, MD

Built 2018 Load: 68.0 t ADT: 3,975

MARRIOTTSVILLE RD

Good

Over: SOUTH BR PATAPSCO RIVER

ON HOWARD COUNTY LINE, Carroll, MD

Built 1986 Load: 68.0 t ADT: 12,255

MD 224

Good

Over: BR OF THORNE GUT

5.35 MILES NORTH OF MD 6, Charles, MD

Built 2018 Load: 68.0 t ADT: 50

MD 224

Good

Over: THORNE GUT

4.54 MILES NORTH OF MD 6, Charles, MD

Built 2018 Load: 68.0 t ADT: 71

SUGARLOAF PARKWAY

Good

Over: TRIB OF PETER PAN RUN

S OF BUSH CREEK DRIVE, Frederick, MD

Built 1999 Load: 68.0 t ADT: 1,080

MONUMENT ROAD

Good

Over: GRINDSTONE RUN

1.55 MI WEST OF MD 17, Frederick, MD

Built 1977 Load: 68.0 t ADT: 311

BONNIE BRANCH RD

Good

Over: BONNIE BRANCH

0.2 MI E OF COLLEGE AVE, Howard, MD

Built 2006 Load: 68.0 t ADT: 1,000

MUNCASTER ROAD

Good

Over: ROCK CREEK

1 MILE NORTH OF MD 115, Montgomery, MD

Built 2006 Load: 68.0 t ADT: 7,803

RACE TRACK ROAD

Good

Over: W B & A TRAIL

.3 MI NE OF BOWIE R TRACK, Prince George's, MD

Built 2000 Load: 68.0 t ADT: 11,670

CROMWELL VALLEY PA

Good

Over: MINEBANK RUN

0.3 MI. NW CROMWELL BR RD, Baltimore, MD

Built 2005 Load: 68.5 t ADT: 212

CARRS MILL ROAD

Good

Over: WINTERS RUN

1.4 MILES N OF MD 152, Harford, MD

Built 1991 Load: 68.5 t ADT: 8,285

MONTROSE ROAD

Good

Over: RAMP TO I-270

0.1 MI W OF I-270, Montgomery, MD

Built 1990 Load: 68.5 t ADT: 22,375

SHETLANDS LANE

Good

Over: TRIBUTARY TO MARLEY CREE

0.80 MI S OF MD 100, Anne Arundel, MD

Built 1975 Load: 68.9 t ADT: 2,819

BENSON MILL ROAD

Good

Over: BLACKROCK RUN

0.3 MI E OF MD 25, Baltimore, MD

Built 2001 Load: 68.9 t ADT: 4,229

OWINGS MILLS BOULE

Good

Over: TRIBUTARY TO GWYNNS FALL

0.06 MI S OF GWYNBRK AVE, Baltimore, MD

Built 2003 Load: 68.9 t ADT: 29,024

MD-43

Good

Over: I-95 Ramps E & F

3.2 MI N OF I-695/I-95INT, Baltimore, MD

Built 2012 Load: 68.9 t ADT: 31,500

EARLS ROAD

Good

Over: AMTRAK RAILROAD

0.16 MI N OF MD RTE 150, Baltimore, MD

Built 2000 Load: 69.4 t ADT: 4,370

MD 17

Good

Over: MIDDLE CREEK

0.02 M S OF SPRUCE RUN RD, Frederick, MD

Built 1994 Load: 69.4 t ADT: 1,951

EAST STREET

Good

Over: CARROLL CREEK

JUST S. OF SOUTH STREET, Frederick, MD

Built 1999 Load: 69.4 t ADT: 15,334

BYRD ROAD

Good

Over: LITTLE ANNEMESSEX RIVER

0.2 MILES WEST OF MD 358, Somerset, MD

Built 1984 Load: 69.4 t ADT: 493

WEST CHAPEL ROAD

Good

Over: SWAN CREEK

0.6 MILES S OF MD 156, Harford, MD

Built 1930 Load: 69.7 t ADT: 365

FIFTH LEVEL ENTRAN

Good

Over: HOURLY PARKING GARAGE

BWI HOURLY PARK GARAGE, Anne Arundel, MD

Built 1996 Load: 69.8 t ADT: 1,105

HARRIS MILL ROAD

Good

Over: EBAUGHS CREEK

0.15 MI N OF BOND ROAD, Baltimore, MD

Built 2011 Load: 69.8 t ADT: 370

DURHAM ROAD

Good

Over: WEST BRANCH and WINTERS

0.01 MI E OF CHARLES ST, Harford, MD

Built 1995 Load: 69.8 t ADT: 1,770

GUILFORD ROAD

Good

Over: CSX TRANSPORTATION

ON ANNE ARUNDEL CO LINE, Howard, MD

Built 2008 Load: 69.8 t ADT: 13,485

MARYLAND 36

Good

Over: MOORES RUN ROAD

0.30 MILE NORTH OF MD 935, Allegany, MD

Built 1975 Load: 70.3 t ADT: 5,740

GV714 (MD 32)

Good

Over: CANINE ROAD

ENTRANCE TO N.S.A., Anne Arundel, MD

Built 2005 Load: 70.3 t ADT: 42,132

FOURTH LEVEL ENTRA

Good

Over: HOURLY PARKING GARAGE

BWI HOURLY PARK GARAGE, Anne Arundel, MD

Built 1991 Load: 70.3 t ADT: 1,104

FOURTH LEVEL EXIT

Good

Over: HOURLY PARKING GARAGE

BWI AIRPORT PARK GARAGE, Anne Arundel, MD

Built 1991 Load: 70.3 t ADT: 1,104

HORSESHOE ROAD

Good

Over: STONE RUN

0.91 MI N OF US 1, Cecil, MD

Built 2000 Load: 70.3 t ADT: 1,369

SUNDOWN ROAD

Good

Over: HAWLINGS RIVER

2.0 MILES EAST OF MD 108, Montgomery, MD

Built 1996 Load: 70.3 t ADT: 6,900

BRENTLAND ROAD

Good

Over: LITTLE CATOCTIN CREEK

0.25 MI EAST OF MD RTE 17, Frederick, MD

Built 1982 Load: 70.7 t ADT: 44

MD 32 EB

Good

Over: LITTLE PATUXENT RIVER

0.23 M S OF SHAKER DRIVE, Howard, MD

Built 1981 Load: 70.7 t ADT: 81,712

GREAT STAR DRIVE

Good

Over: CRICKETT CREEK

1.0 Mile SE of MD 108, Howard, MD

Built 1997 Load: 70.7 t ADT: 6,583

HACKETT CORNER RD

Good

Over: UNICORN BRANCH

0.8 MI. E. OF MD313, Queen Anne's, MD

Built 1987 Load: 70.7 t ADT: 663

SHAFT ROAD

Good

Over: GEORGES CREEK

0.13 MI W OF MD 936, Allegany, MD

Built 1940 Load: 71.0 t ADT: 432

IS 695 OL RAMP '1'

Good

Over: LEEDS AVE & HERBERT RUN

0.77 MILE NORTH OF IS 95, Baltimore, MD

Built 2004 Load: 71.2 t ADT: 5,696

STAUFFER ROAD

Good

Over: ISRAEL CREEK

1 MI E OF MD RTE 194, Frederick, MD

Built 1998 Load: 71.2 t ADT: 517

ELLICOTT CENTER DR

Good

Over: UNNAMED STREAM

400 FT NW OF ROGERS AVE, Howard, MD

Built 2003 Load: 71.2 t ADT: 1,814

CLARKSBURG ROAD

Good

Over: BENNETT CREEK TRIBUTARY

0.2 MI W BETHESDA CH RD, Montgomery, MD

Built 2003 Load: 71.2 t ADT: 4,123

Showing 4,901-4,950 of 5,527 bridges

Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.

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). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.