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

GAS HOUSE PIKE

Good

Over: LINGANORE CREEK

1.0 MI W OF CNTRL CHURCH, Frederick, MD

Built 2021 Load: 41.5 t ADT: 11,825

Watkins Mill Road

Good

Over: IS 270 (Wash. Nat'l Pike

0.75 MI. N of MD 124, Montgomery, MD

Built 2020 Load: 41.5 t

MD 97

Good

Over: Reddy Branch

2 MI. NORTH OF OLNEY, Montgomery, MD

Built 2022 Load: 41.5 t ADT: 10,400

PINEY MEETINGHOUSE

Good

Over: WATTS BRANCH

0.8 MILES NORTH OF MD 190, Montgomery, MD

Built 2017 Load: 41.5 t ADT: 6,724

MD 61 (CANAL PKWY)

Good

Over: C & O CANAL

0.13 MILE N OF W VA LINE, Allegany, MD

Built 1997 Load: 41.7 t ADT: 11,501

SECOND LEVEL ENTRA

Good

Over: NORTH END OF CONSOLIDATE

CRCF - BWI AIRPORT, Anne Arundel, MD

Built 2003 Load: 41.7 t ADT: 113

MD 45

Good

Over: BEAVERDAM RUN

0.11 M N OF RAILROAD AVE, Baltimore, MD

Built 1990 Load: 41.7 t ADT: 30,482

MD 695 RAMP 7'A'

Good

Over: NORTHEAST CREEK

@ MD 695 & MD 702, Baltimore, MD

Built 1972 Load: 41.7 t ADT: 7,951

OWINGS MILLS BOULE

Good

Over: RED RUN

1 MI SOUTH OF IS 795, Baltimore, MD

Built 1990 Load: 41.7 t ADT: 36,114

NICODEMUS ROAD

Good

Over: LIBERTY RESERVOIR

0.4 MI W IVY MILL RD, Baltimore, MD

Built 2011 Load: 41.7 t ADT: 3,510

MD 509

Good

Over: GOVERNOR RUN

0.79 MI E OF MD 765, Calvert, MD

Built 2002 Load: 41.7 t ADT: 791

OLD ANNAPOLIS ROAD

Good

Over: LINGANORE CREEK

0.9 MI W OF MD 75, Frederick, MD

Built 1989 Load: 41.7 t ADT: 2,931

SANNER ROAD

Good

Over: TRIB OF MIDDLE PATUXENT

0.3 MI S PINDELL SCHOOL, Howard, MD

Built 2003 Load: 41.7 t ADT: 2,493

I-370 RAMP - B

Good

Over: CRABBS BRANCH WAY

0.56 MI E OF MD 355, Montgomery, MD

Built 2009 Load: 41.7 t ADT: 3,953

MD 200 (ICC) WB

Good

Over: TRIBUTARY OF NBRC

1.34 MI W OF MD 97, Montgomery, MD

Built 2010 Load: 41.7 t ADT: 30,827

EMORY LANE

Good

Over: MD 200 (ICC)

0.93 MI W OF MD 97, Montgomery, MD

Built 2010 Load: 41.7 t ADT: 8,133

MD200 Ramp I-A

Good

Over: MD200 & I-95

MD200 EB RAMP I-A TO I-95, Prince George's, MD

Built 2010 Load: 41.7 t ADT: 12,656

MD 362

Good

Over: MONIE CREEK

3.31 MILES WEST OF US 13, Somerset, MD

Built 2009 Load: 41.7 t ADT: 1,622

MD 404 ALT

Good

Over: NORWICH CREEK

0.25 MI E OF MD 404, Talbot, MD

Built 1995 Load: 41.7 t ADT: 280

LEITERS MILL ROAD

Good

Over: ANTIETAM CREEK

0.2 MI N OF MD RTE 60, Washington, MD

Built 1839 Load: 41.7 t ADT: 1,470

US 113

Good

Over: CHURCH BRANCH

0.312 MILE N OF MD 589, Worcester, MD

Built 2001 Load: 41.7 t ADT: 14,192

GAS HOUSE PIKE

Good

Over: LINGANORE CREEK

1.0 MI W OF CNTRL CHURCH, Frederick, MD

Built 2021 Load: 41.8 t ADT: 11,825

LEWISTOWN ROAD

Good

Over: FISHING CREEK

0.3 MI E OF HESSONG BRDG, Frederick, MD

Built 1920 Load: 41.8 t ADT: 466

GORE MILL ROAD

Good

Over: LITTLE FALLS

1.4 MI NE MIDDLETOWN RD, Baltimore, MD

Built 2018 Load: 42.1 t ADT: 193

Harford Road

Good

Over: Herring Run Trail

0.4 MI S ARGONNE DRIVE, Baltimore city, MD

Built 2022 Load: 42.1 t ADT: 20,994

MD 464 (POINT OF R

Good

Over: LITTLE CATOCTIN CREEK

2.16 MILES EAST OF MD 17, Frederick, MD

Built 2020 Load: 42.1 t ADT: 4,400

CHRISTOPHERS CROSS

Good

Over: TRIBUTARY 89

0.2 MI E OF WATER MARTZ R, Frederick, MD

Built 2019 Load: 42.1 t ADT: 4,430

ELMHIRST PARKWAY

Good

Over: ROCK CREEK TRIBUTARY

0.3 MI N OF CEDAR LANE, Montgomery, MD

Built 2016 Load: 42.1 t ADT: 718

SPINE RD

Good

Over: MD 5

9 MI S OF I95/495, Prince George's, MD

Built 2018 Load: 42.1 t ADT: 17,425

MD 381

Good

Over: TIMOTHY BRANCH

325' North of Kathleen La, Prince George's, MD

Built 2018 Load: 42.1 t ADT: 9,000

IS 68 EBR

Good

Over: TOWN CREEK

0.24 M E OF BR NO 0114000, Allegany, MD

Built 1990 Load: 42.2 t ADT: 18,551

IS 68 WBR

Good

Over: TOWN CREEK

0.24 M E OF BR NO 0114000, Allegany, MD

Built 1990 Load: 42.2 t ADT: 18,551

BIG FALLS ROAD

Good

Over: LITTLE FALLS

125 FT NE OF BERNOUDY, Baltimore, MD

Built 1986 Load: 42.2 t ADT: 1,405

GWYNNBROOK AVENUE

Good

Over: ROACHES RUN

0.38 MI E OF MD 140, Baltimore, MD

Built 1976 Load: 42.2 t ADT: 4,304

MOUNT STREET

Good

Over: AMTRAK RAILROAD

0.1 MI E OF MONROE ST, Baltimore city, MD

Built 1997 Load: 42.2 t ADT: 3,077

I-895 SB

Good

Over: HERRING RUN

MILEPOST M13.7, Baltimore city, MD

Built 1957 Load: 42.2 t ADT: 35,344

CARPENTERS PT ROAD

Good

Over: UNNAMED STREAM

0.68 MI S OF MD 267, Cecil, MD

Built 2013 Load: 42.2 t ADT: 755

LITTLE SENECA PKWY

Good

Over: LITTLE SENECA CREEK TRIB

0.5 MI. E. OF MD 355, Montgomery, MD

Built 2011 Load: 42.2 t ADT: 10,542

Ramp NW to MD200WB

Good

Over: US29, Ramp NB&SE, MD200

0.4 Mi S of Briggs Chaney, Montgomery, MD

Built 2011 Load: 42.2 t ADT: 2,294

MD 725

Good

Over: WESTERN BRANCH

0.41 MILE EAST OF MD 717, Prince George's, MD

Built 1992 Load: 42.2 t ADT: 15,371

EARTH CARE ROAD

Good

Over: CONOCOCHEAGUE CREEK

0.4 MI NORTH OF US 40, Washington, MD

Built 2000 Load: 42.2 t ADT: 721

ROWLAND ROAD

Good

Over: BASIN RUN

0.26 MI S OF COLORA RD, Cecil, MD

Built 2011 Load: 42.4 t ADT: 331

RAZOR STRAP ROAD

Good

Over: STONY RUN

0.47 MI W OF US 40, Cecil, MD

Built 2017 Load: 42.4 t ADT: 1,613

STAFFORD ROAD

Good

Over: DEER CREEK

0.03 MI N OF CRAIGS CR RD, Harford, MD

Built 1951 Load: 42.4 t ADT: 469

NEW PARK ROAD

Good

Over: ISLAND BRANCH

0.78 MI. NE OF ROUTE 23, Harford, MD

Built 2019 Load: 42.4 t ADT: 395

SNOUFFER SCHOOL RO

Good

Over: CABIN BRANCH

1.3 MI N OF MD124, Montgomery, MD

Built 2020 Load: 42.4 t ADT: 18,315

CONNECTOR ROAD

Good

Over: NSA PERIMETER ROAD

2.0 MILES FROM MD ROUTE 1, Anne Arundel, MD

Built 1988 Load: 42.6 t ADT: 14,000

OLD COURT ROAD

Good

Over: SCOTTS LEVEL BRANCH

300 FEET W OF WINANDS RD, Baltimore, MD

Built 1964 Load: 42.6 t ADT: 1,115

MD 478

Good

Over: BR OF POTOMAC RIVER

1.78 MI S. EAST OF MD 180, Frederick, MD

Built 2019 Load: 42.6 t ADT: 2,471

SPRUCE RUN ROAD

Good

Over: MIDDLE CREEK

0.1 MI N OF MD RTE 17, Frederick, MD

Built 1982 Load: 42.6 t ADT: 181

Showing 4,301-4,350 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.