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%.

Condition Distribution

Bridge inventory deck-condition mix — Maryland (FHWA NBI)

Maryland25.909173149990956%49.140582594535914%GoodFairPoorStructurally Deficient
Bridge inventory deck-condition mix — Maryland (FHWA NBI)

Counties (24)

Allegany 245 Anne Arundel 395 Baltimore 787 Baltimore city 380 Calvert 33 Caroline 70 Carroll 205 Cecil 194 Charles 94 Dorchester 47 Frederick 491 Garrett 139 Harford 275 Howard 310 Kent 44 Montgomery 522 Prince George's 582 Queen Anne's 88 Somerset 46 St. Mary's 50 Talbot 42 Washington 301 Wicomico 100 Worcester 82

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.

OLD SELBYSPORT RD

Poor

Over: BEAR CREEK

0.01 MI N OF WALNUT ST, Garrett, MD

Built 1920 Load: 2.7 t ADT: 30

ZION ROAD

Poor

Over: HAWLINGS RIVER

2.8 MILES NORTH OF MD 108, Montgomery, MD

Built 1930 Load: 4.5 t ADT: 2,440

ROXBURY ROAD

Poor

Over: BEAVER CREEK

0.1 MI W OF ALT US RTE 40, Washington, MD

Built 1920 Load: 7.3 t ADT: 533

TUFTON AVENUE

Poor

Over: WATERSPOUT RUN

2.63 MI. WEST MD 25, Baltimore, MD

Built 1920 Load: 7.7 t ADT: 7,735

MOHRS LANE

Structurally Deficient

Over: CSX RAILROAD

0.1 MI NW OF US RTE 40, Baltimore, MD

Built 1912 Load: 9.1 t ADT: 1,600

OLD MONTGOMERY RD

Structurally Deficient

Over: LITTLE PATUXENT RIVER

0.5 MI W OF US RTE 29, Howard, MD

Built 1935 Load: 10.0 t ADT: 10

All Bridges in Maryland

COMUS ROAD

Unknown

Over: IS 270

1.3 MI N OF MD 121, Montgomery, MD

Built 1952 ADT: 94,940

MD 121

Unknown

Over: IS 270

1.28 M N OF BR NO 1503900, Montgomery, MD

Built 1952 ADT: 94,940

IS 270

Unknown

Over: WEST OLD BALTIMORE RD

1.28 MILES E OF MD 121, Montgomery, MD

Built 1954 ADT: 1,580

MD 118

Unknown

Over: IS 270

0.77 M N OF BR NO 1504200, Montgomery, MD

Built 1954 ADT: 119,710

IS 270

Unknown

Over: MD 124

0.49 MILE NORTH OF MD 117, Montgomery, MD

Built 1955 ADT: 29,340

IS 270

Unknown

Over: MD 117

0.49 MILE NORTH OF MD 124, Montgomery, MD

Built 1954 ADT: 43,322

MUDDY BRANCH ROAD

Unknown

Over: IS 270 NB C-D ROAD

0.85 MILE NORTH OF IS 370, Montgomery, MD

Built 1954 ADT: 18,879

MUDDY BRANCH ROAD

Unknown

Over: IS 270

0.85 MILE NORTH OF IS 370, Montgomery, MD

Built 1954 ADT: 188,702

SHADY GROVE ROAD

Unknown

Over: IS 270

0.93 MILE SOUTH OF IS 370, Montgomery, MD

Built 1987 ADT: 146,985

MD 28

Unknown

Over: IS 270

0.96 MILE NORTH OF MD 189, Montgomery, MD

Built 1955 ADT: 185,579

MD 189

Unknown

Over: IS 270

0.96 MILE SOUTH OF MD 28, Montgomery, MD

Built 1955 ADT: 200,505

MD 355

Unknown

Over: CSX TRANS, MU 681, MU 77

0.23 MI S OF MD 124, Montgomery, MD

Built 1987 ADT: 10,182

US 29

Unknown

Over: MD 650

0.16 M S OF MILESTONE DR, Montgomery, MD

Built 1957 ADT: 42,190

MD 927-MONTROSE RD

Unknown

Over: IS 270 NB C-D ROAD

1.36 MILES S OF MD 189, Montgomery, MD

Built 1998 ADT: 32,573

GROSVENOR LA

Unknown

Over: IS 270

0.27 MILE NORTH OF IS 695, Montgomery, MD

Built 1958 ADT: 122,760

PEDESTRIAN

Unknown

Over: US 29

0.06 MI S OF SLIGO AVE, Montgomery, MD

Built 1948 ADT: 41,902

MD 187

Unknown

Over: IS 270

1027 M N OF BR NO 1507700, Montgomery, MD

Built 2002 ADT: 130,450

IS 270

Unknown

Over: TUCKERMAN LANE

0.25 MI W OF IS 270Y, Montgomery, MD

Built 1958 ADT: 21,000

IS 270 RAMP 'C'

Unknown

Over: IS 270Y RAMPS 'B' & 'B3'

.91 M N OF DEMOCRACY BLVD, Montgomery, MD

Built 1958 ADT: 132,561

CSX TRANSPORTATION

Unknown

Over: IS 270

0.23 MI S OF MD 124, Montgomery, MD

Built 1987 ADT: 152,544

DEMOCRACY BLVD

Unknown

Over: IS 270Y

0.79 MILE NORTH OF IS 495, Montgomery, MD

Built 2004 ADT: 132,561

IS 495 RAMP

Unknown

Over: CLARA BARTON PKWY WBR

0.55 MI W OF MD 191, Montgomery, MD

Built 1963 ADT: 21,462

IS 495

Unknown

Over: MAC ARTHUR BLVD & GWMP

0.55 MI W OF MD 191, Montgomery, MD

Built 1963 ADT: 12,002

PERSIMMON TREE RD

Unknown

Over: IS 495

0.06 MI S OF MD 996, Montgomery, MD

Built 1962 ADT: 214,005

IS 495

Unknown

Over: IS 495X & C J CR

0.24 MILE SOUTH OF IS 495, Montgomery, MD

Built 1962 ADT: 19,820

IS 495 RAMP 'K'

Unknown

Over: IS 495X NBR

0.24 MILE SOUTH OF IS 495, Montgomery, MD

Built 1964 ADT: 19,820

MD 190

Unknown

Over: IS 495

1.32 MILES WEST OF MD 191, Montgomery, MD

Built 1962 ADT: 220,020

MD 191

Unknown

Over: IS 495 & THOMAS BRANCH

1.32 MILES EAST OF MD 190, Montgomery, MD

Built 1962 ADT: 220,020

IS 495 OL

Unknown

Over: IS 270Y

0.05 MILE NORTH OF IS 495, Montgomery, MD

Built 1996 ADT: 129,011

GREENTREE RD

Unknown

Over: IS 495

.29 MILE NORTH OF IS 270Y, Montgomery, MD

Built 1962 ADT: 115,850

FERNWOOD RD

Unknown

Over: IS 495

0.78 MILE SOUTH OF MD 187, Montgomery, MD

Built 1962 ADT: 115,850

IS 495

Unknown

Over: MD 187 (OLD G'TOWN RD)

0.2 M N OF RYLAND DRIVE, Montgomery, MD

Built 2004 ADT: 44,540

MD 355 SBR

Unknown

Over: MD 355 RAMP 1

0.10 MI N OF IS 495, Montgomery, MD

Built 1960 ADT: 10,596

MD 355 SBR

Unknown

Over: IS 495 OL

1.02 MILES EAST OF MD 187, Montgomery, MD

Built 1960 ADT: 115,750

MD 355 NBR

Unknown

Over: IS 495 OL

1.1 MILES EAST OF MD 187, Montgomery, MD

Built 1960 ADT: 238,050

MD 355 SBR

Unknown

Over: IS 495 IL

1.02 MILES EAST OF MD 187, Montgomery, MD

Built 1960 ADT: 115,750

MD 355 NBR

Unknown

Over: IS 495 IL

1.1 MILES EAST OF MD 187, Montgomery, MD

Built 1960 ADT: 238,050

IS 495

Unknown

Over: MD 185(CONNECTICUT AVE)

1.24 MILE NORTH OD MD 410, Montgomery, MD

Built 1964 ADT: 44,232

IS 495

Unknown

Over: KENSIGNTON PARKWAY

0.19 MI E OF MD 185, Montgomery, MD

Built 1964

IS 495

Unknown

Over: STONEY BROOK DR, ROCK CR

0.67 MI W OF MD 391, Montgomery, MD

Built 1964 ADT: 3,140

FOREST GLEN ROAD

Unknown

Over: IS 495

0.86 MILE WEST OF MD 97, Montgomery, MD

Built 1964 ADT: 239,310

CSX TRANSPORTATION

Unknown

Over: IS 495

0.69 MILE WEST OF MD 97, Montgomery, MD

Built 1959 ADT: 239,310

SEMINARY ROAD

Unknown

Over: IS 495

0.62 MILE WEST OF MD 97, Montgomery, MD

Built 1964 ADT: 239,310

IS 495

Unknown

Over: MD 97

0.17 MILE SOUTH OF MD 192, Montgomery, MD

Built 1958 ADT: 80,840

IS 495

Unknown

Over: SLIGO CREEK PARKWAY

0.61 MI E OF MD 97, Montgomery, MD

Built 1959 ADT: 5,587

US 29

Unknown

Over: IS 495

0.64 MILE WEST OF MD 193, Montgomery, MD

Built 1959 ADT: 214,980

MD 193

Unknown

Over: IS 495

0.64 MILE EAST OF US 29, Montgomery, MD

Built 1958 ADT: 210,927

IS 495

Unknown

Over: MD 650

2.19 MILE NORTH OF MD 193, Montgomery, MD

Built 1963 ADT: 54,900

MD 650 RAMP 'F'

Unknown

Over: IS 495

0.10 MI W OF PG CO LINE, Montgomery, MD

Built 1964 ADT: 243,712

IS 495 SE RAMP

Unknown

Over: CLARA BARTON PKWY

0.39 MI E OF VA LINE, Montgomery, MD

Built 1963 ADT: 13,090

Showing 801-850 of 5,527 bridges

Related

All states → | National rankings → | Understanding conditions → | SD bridges explained →
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.

Understanding Bridge Conditions

How FHWA rates bridge condition on a 0-9 scale.

Check Your Daily Bridges

How to look up bridge condition data for bridges on your route.

Read our methodology — how this data is sourced, computed, and verified.