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

MD 355

Good

Over: GREAT SENECA CREEK

1.32 MILES N OF MD 124, Montgomery, MD

Built 2000 Load: 49.0 t ADT: 31,050

HOWARD CHAPEL RD

Good

Over: PATUXENT RIVER

1.7 MI NORTH OF MD 650, Montgomery, MD

Built 2002 Load: 49.0 t ADT: 563

MD200 Ramp I-A

Good

Over: I95 NB-CD

MD200EB Ramp I-A to I95NB, Prince George's, MD

Built 2011 Load: 49.0 t ADT: 12,656

WILSON BOULEVARD

Good

Over: PINE STREET

0.05 MI E of Route 11, Washington, MD

Built 1983 Load: 49.0 t ADT: 16,448

SANDYFIELD ROAD

Good

Over: NINEPIN BRANCH

0.76 MI S OF MD 374, Worcester, MD

Built 2002 Load: 49.0 t ADT: 90

MD 272

Good

Over: AMTRAK

0.32 MILE SOUTH OF US 40, Cecil, MD

Built 2020 Load: 49.2 t ADT: 11,950

NEW VAIL ST

Good

Over: Canton RR

0.0 MI. S of Keith Ave, Baltimore city, MD

Built 1990 Load: 49.4 t ADT: 1,183

COOLEY MILL ROAD

Good

Over: ROCK RUN

0.7 MI SE OF ROCK RUN RD, Harford, MD

Built 1997 Load: 49.4 t ADT: 200

DRIVEWAY OFF AINTR

Good

Over: WATTS BRANCH

WOOTTONS MILL PARK, Montgomery, MD

Built 2009 Load: 49.4 t ADT: 20

LONGMEAD CROSSING

Good

Over: MD 200 (ICC)

3.61 MI WEST OF MD650, Montgomery, MD

Built 2010 Load: 49.4 t ADT: 6,790

CONTEE ROAD

Good

Over: CSX RAILROAD

0.1 MI EAST OF US 1, Prince George's, MD

Built 1997 Load: 49.4 t ADT: 22,202

HALFWAY BOULEVARD

Good

Over: TRIBUTARY OF CONOCOCHEAG

0.6 MI WEST OF I-81, Washington, MD

Built 2005 Load: 49.4 t ADT: 4,256

SOUTH POINTE DRIVE

Good

Over: TRIBUTARY OF ANTIETAM CR

.3 MI N OF E OAK RIDGE DR, Washington, MD

Built 2000 Load: 49.4 t ADT: 3,885

MD 135

Good

Over: GEORGES CREEK

0.02 MI E OF MD 36, Allegany, MD

Built 1963 Load: 49.9 t ADT: 6,642

DOLFIELD BOULEVARD

Good

Over: RED RUN BRANCH

0.9 MI S OF RED RUN BLVD, Baltimore, MD

Built 2010 Load: 49.9 t ADT: 22,984

SHEPHERD'S MILL RD

Good

Over: LITTLE PIPE CREEK

JUST E OF UNION BRIDGE, Carroll, MD

Built 2023 Load: 49.9 t ADT: 613

COXEY BROWN ROAD

Good

Over: LITTLE CATOCTIN CREEK

AT HARMONY RD INT, Frederick, MD

Built 1983 Load: 49.9 t ADT: 517

CHESTNUT HILL ROAD

Good

Over: STOUT BOTTLE BRANCH

0.6 MILES NW OF MD 543, Harford, MD

Built 2020 Load: 49.9 t ADT: 681

MD 100

Good

Over: EXECUTIVE PARK DRIVE

0.91 MILE WEST OF MD 104, Howard, MD

Built 1998 Load: 49.9 t ADT: 79,752

MD 100

Good

Over: CSX RR, O'CONNOR RD

0.24 M W OF AA CO LINE, Howard, MD

Built 1996 Load: 49.9 t ADT: 83,402

MD 100

Good

Over: CSX RR, O'CONNOR ROAD

0.24 M W OF AA CO LINE, Howard, MD

Built 1996 Load: 49.9 t ADT: 83,402

PARK VALLEY ROAD

Good

Over: SLIGO CREEK

AT SLIGO CR PKWY, Montgomery, MD

Built 2019 Load: 49.9 t ADT: 1,126

IS 595, RAMP 'A'

Good

Over: BALD HILL BRANCH

1 MI E OF JCT IS 95, Prince George's, MD

Built 1955 Load: 49.9 t ADT: 144,254

MARYLAND 63

Good

Over: CSX TRANS.

1.08 MILES NORTH OF US 11, Washington, MD

Built 1959 Load: 49.9 t ADT: 12,600

MARBLE QUARRY ROAD

Good

Over: LITTLE ANTIETAM CREEK

1.02 MI NW OF MD RTE 67, Washington, MD

Built 2007 Load: 49.9 t ADT: 223

GORE MILL ROAD

Good

Over: LITTLE FALLS

1.2 MI. N MIDDLETOWN ROAD, Baltimore, MD

Built 2019 Load: 50.2 t ADT: 170

US 220

Good

Over: PEA VINE RUN & BEALS MIL

1063 MILES NORTH OF IS 68, Allegany, MD

Built 1999 Load: 50.3 t ADT: 3,841

STONEY RUN ROAD

Good

Over: MD 170 / AMTRAK

0.9 MI SOUTH OF I-195, Anne Arundel, MD

Built 1982 Load: 50.3 t ADT: 14,344

NOTTINGHAM RD

Good

Over: CSX RAILROAD

0.82 MI S OF UNION CHURCH, Cecil, MD

Built 2012 Load: 50.3 t ADT: 1,423

FRIST ROAD

Good

Over: BASIN RUN

0.19 MI S OF LIBERTY G RD, Cecil, MD

Built 2007 Load: 50.3 t ADT: 405

MONUMENT ROAD

Good

Over: GRINDSTONE RUN

0.75 MI WEST OF MD RTE 17, Frederick, MD

Built 1982 Load: 50.3 t ADT: 421

TURNER ROAD

Good

Over: TRIB / L GUNPOWDER FALLS

0.4 MILES N OF POCOCK RD, Harford, MD

Built 2003 Load: 50.3 t ADT: 101

BAILEY ROAD

Good

Over: SOUTH STIRRUP RUN

0.5 MI E OF SHARON ACR RD, Harford, MD

Built 1953 Load: 50.3 t ADT: 155

MD 97 NB

Good

Over: MD 200 (ICC)

0.59 MI NORTH OF MD 28, Montgomery, MD

Built 2010 Load: 50.3 t ADT: 23,218

MD 200 (ICC) Ramp

Good

Over: MD 200 (ICC) Ramp SE

0.2 mi W US29/MD200 I/C, Montgomery, MD

Built 2010 Load: 50.3 t ADT: 2,449

WARNER AVENUE

Good

Over: TRIBUTARY TO BEAVERDAM C

0.03 MI N OF PARKWOOD ST, Prince George's, MD

Built 1997 Load: 50.3 t ADT: 5,142

64TH AVENUE

Good

Over: CABIN BRANCH

0.11 MI N OF STATE STREET, Prince George's, MD

Built 1980 Load: 50.3 t ADT: 235

SANG RUN ROAD

Good

Over: SANG RUN

0.98 MI SW OF BISHOFF RD, Garrett, MD

Built 2021 Load: 50.5 t ADT: 412

NATIONAL BUSINESS

Good

Over: TRIBUTARY TO DORSEY RUN

.68 M N OF TECHNOLOGY DR, Anne Arundel, MD

Built 2011 Load: 50.8 t ADT: 13,301

MD 150

Good

Over: BACK RIVER

0.82 MILE EAST OF MD 695, Baltimore, MD

Built 1988 Load: 50.8 t ADT: 29,630

MD 158

Good

Over: Tradepoint Railroad

0.22 MILE WEST OF MD 151, Baltimore, MD

Built 1995 Load: 50.8 t ADT: 12,161

CORBETT ROAD

Good

Over: TRIBUTARY TO GUNPOWDER F

1.3 MILES EAST OF MD 45, Baltimore, MD

Built 1920 Load: 50.8 t ADT: 714

SB I-83 OFF-RAMP t

Good

Over: MTA LIGHT RAIL

OFFRAMP SB JFX @ CLDSPRNG, Baltimore city, MD

Built 1962 Load: 50.8 t ADT: 5,149

I-83SB OFF-RAMP

Good

Over: MTA LIGHT RAIL

I-83 AT NORTHERN PKWY, Baltimore city, MD

Built 1962 Load: 50.8 t ADT: 23,357

I-895 RAMP B

Good

Over: LOMBARD STREET

Milepost M12.51, Baltimore city, MD

Built 1994 Load: 50.8 t ADT: 66,347

PARKING LOT ROAD

Good

Over: BLUE BLAZES CREEK

US-15N, WEST ON MC-77 TO, Frederick, MD

Built 2019 Load: 50.8 t ADT: 20

GREENE ROAD

Good

Over: SAW MILL BRANCH

0.3 MILES NE OF BALT CO, Harford, MD

Built 1952 Load: 50.8 t ADT: 616

I-370 WBR

Good

Over: IS-370 RP1, MD200 RP7

5.67 MI WEST OF MD97, Montgomery, MD

Built 2010 Load: 50.8 t ADT: 39,531

WHITE GROUND ROAD

Good

Over: BUCKLODGE BRANCH

2 MILES NORTH OF MD 28, Montgomery, MD

Built 2012 Load: 50.8 t ADT: 823

WATKINS MILL ROAD

Good

Over: WHETSTONE RUN

0.5 MILES EAST OF MD 355, Montgomery, MD

Built 1997 Load: 50.8 t ADT: 8,397

Showing 4,551-4,600 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.