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

IS 70 EBR

Unknown

Over: HOLLOW ROAD

2.77 MILES W OF US 40, Frederick, MD

Built 1968 ADT: 510

IS 70 WBR

Unknown

Over: HOLLOW ROAD

2.77 MILES W OF US 40, Frederick, MD

Built 1968 ADT: 510

IS 70 EBR & RAMP B

Unknown

Over: MD 180

0.27 MILE EAST OF US 15, Frederick, MD

Built 1968 ADT: 25,990

IS 70 WBR

Unknown

Over: MD 180

0.27 MILE EAST OF US 15, Frederick, MD

Built 1968 ADT: 25,990

IS 70 EBR

Unknown

Over: HARMONY RD & LI CATOC.

1.95 MILES E OF MD 17, Frederick, MD

Built 1968 ADT: 125

IS 70 WBR

Unknown

Over: HARMONY RD & LI CATOC.

1.95 MILES E OF MD 17, Frederick, MD

Built 1968 ADT: 125

IS 70 EBR

Unknown

Over: US 40AL

1.37 MILES WEST OF US 40, Frederick, MD

Built 1967 ADT: 12,112

IS 70 WBR

Unknown

Over: US 40AL

1.37 MILES WEST OF US 40, Frederick, MD

Built 1967 ADT: 12,112

APPALACHIAN TRAIL

Unknown

Over: IS 70

0.02 M E OF WASH CO LINE, Frederick, MD

Built 1968 ADT: 58,600

IS 70 EBR

Unknown

Over: MONUMENT ROAD

1.59 MILES E OF WASH CO, Frederick, MD

Built 1968 ADT: 147

IS 70 WBR

Unknown

Over: MONUMENT ROAD

1.59 MILES E OF WASH CO, Frederick, MD

Built 1968 ADT: 147

IS 70 EBR

Unknown

Over: MT TABOR ROAD

1.17 MILES W OF MD 17, Frederick, MD

Built 1968 ADT: 568

IS 70 WBR

Unknown

Over: MT TABOR ROAD

1.17 MILES W OF MD 17, Frederick, MD

Built 1968 ADT: 568

MD 17

Unknown

Over: IS 70

1.15 M E OF MT TABOR ROAD, Frederick, MD

Built 1968 ADT: 68,230

IS 70 WBR

Unknown

Over: IS 270

0.09 M N OF BR NO 1010300, Frederick, MD

Built 1968 ADT: 109,670

IS 70 WBR

Unknown

Over: US 40 EBR(RAMP 5)

0.5 MILE EAST OF MD 180, Frederick, MD

Built 2002 ADT: 18,542

ELMER DERR ROAD

Unknown

Over: US 15

0.46 MILE SOUTH OF US 340, Frederick, MD

Built 1969 ADT: 16,060

IS 70 RAMPS A & E

Unknown

Over: MD 180

0.27 MILE EAST OF US 15, Frederick, MD

Built 1968 ADT: 25,990

IS 70 EBR

Unknown

Over: US 15

0.24 MILE WEST OF MD 180, Frederick, MD

Built 1968 ADT: 26,810

IS 70 WBR

Unknown

Over: US 15

0.24 MILE WEST OF MD 180, Frederick, MD

Built 1968 ADT: 26,810

IS 70 EBR

Unknown

Over: IS 70 RAMP 'A'

0.28 MI E OF MD 180, Frederick, MD

Built 1968 ADT: 8,557

IS 70 WBR

Unknown

Over: RAMP 'A'

0.28 MI E OF MD 180, Frederick, MD

Built 1968 ADT: 8,557

IS 70 RAMPS A & E

Unknown

Over: US 15/US 340

0.09 MILE NORTH OF IS 70, Frederick, MD

Built 1968 ADT: 26,810

MD 180

Unknown

Over: IS 70

0.37 MILE WESY OF US 15, Frederick, MD

Built 1968 ADT: 74,920

IS 70 EBR

Unknown

Over: IS 70 RAMP 'E'

0.29 MI W OF US 40 AL, Frederick, MD

Built 1969 ADT: 4,781

IS 70 WBR

Unknown

Over: IS 70 RAMP 'E'

0.29 MI W OF US 40 AL, Frederick, MD

Built 1969 ADT: 4,781

US 40 EBR

Unknown

Over: IS 70 RAMP 'F' (02)

0.87 MI W OF FREDERICK, Frederick, MD

Built 1969 ADT: 3,593

MD 180

Unknown

Over: US 15

0.48 MI E OF IS 70, Frederick, MD

Built 1968 ADT: 44,760

MT ZION ROAD

Unknown

Over: US 15

1.88 MILE NORTH OF US 340, Frederick, MD

Built 1968 ADT: 51,930

MD 140

Unknown

Over: US 15

0.1 MILE NORTH OF MD 904F, Frederick, MD

Built 1971 ADT: 17,010

US 15 NBR

Unknown

Over: MD 550

0.8 MILE SOUTH OF MD 77, Frederick, MD

Built 1972 ADT: 7,221

RIDGE ROAD

Unknown

Over: IS 70

1.87 MI W OF US 40AL, Frederick, MD

Built 1972 ADT: 68,230

MD 75

Unknown

Over: IS 70

0.07 M E OF BR NO 1017500, Frederick, MD

Built 1973 ADT: 69,020

MUSSETTER ROAD

Unknown

Over: IS 70

2.1 MILE WEST OF MD 75, Frederick, MD

Built 1973 ADT: 67,980

BARTHOLOWS ROAD

Unknown

Over: IS 70,CSX TRANSPORTATION

2.27 MILE EAST OF MD 75, Frederick, MD

Built 1974 ADT: 69,020

IS 70 EBR

Unknown

Over: BILL MOXELY ROAD

1.75 MI W OF CARROLL CO, Frederick, MD

Built 1974

IS 70 WBR

Unknown

Over: BILL MOXLEY ROAD

1.75 MI W OF CARROLL CO, Frederick, MD

Built 1974

US 15 SBR

Unknown

Over: MD 550

0.37 MI N OF MD 15D, Frederick, MD

Built 1982 ADT: 7,221

US 15 NBR

Unknown

Over: MD 77, HUNTING CREEK

0.03 M E OF MOUNTAIN ROAD, Frederick, MD

Built 1985 ADT: 8,551

US 15 NBR

Unknown

Over: MD 15C

0.76 MI S OF MD 77, Frederick, MD

Built 1985 ADT: 999

US 15 SBR

Unknown

Over: MD 15C

0.76 MI S OF MD 77, Frederick, MD

Built 1985 ADT: 999

PEDESTRIAN

Unknown

Over: US 15

0.913 M N OF MD 806A, Frederick, MD

Built 1983 ADT: 30,800

LINGANORE ROAD

Unknown

Over: IS 70

1.48 M W OF QUINN ROAD, Frederick, MD

Built 1985 ADT: 59,922

IS 70 EBR

Unknown

Over: SPRING RIDGE PKWY

2.38 MI E OF FREDERICK, Frederick, MD

Built 1985

IS 70 WBR

Unknown

Over: SPRING RIDGE PKWY

2.38 MI E OF FREDERICK, Frederick, MD

Built 1985

QUINN ROAD

Unknown

Over: IS 70

1.48 M E OF LINGANORE RD, Frederick, MD

Built 1985 ADT: 59,922

IS 70 EBR

Unknown

Over: OLD NATIONAL PIKE

3.93 MI W OF MD 75, Frederick, MD

Built 1985 ADT: 8,831

IS 70 WBR

Unknown

Over: OLD NATIONAL PIKE

3.93 MI W OF MD 75, Frederick, MD

Built 1985 ADT: 8,831

IS 70 RAMP 'B'

Unknown

Over: MD 180

0.14 MILE WEST OF MD 351, Frederick, MD

Built 1996 ADT: 25,990

IS 70 RAMP '7'

Unknown

Over: US 40 RAMP '5'

0.34 MILE EAST OF US 15, Frederick, MD

Built 2002 ADT: 18,542

Showing 601-650 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.