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

MAXA ROAD

Unknown

Over: IS 95

Milepost M85.9, Harford, MD

Built 1963 ADT: 5,000

IS 95

Unknown

Over: PARADISE ROAD

Milepost M86.6, Harford, MD

Built 1963 ADT: 85,175

CHAPEL ROAD

Unknown

Over: IS 95

Milepost 87.8, Harford, MD

Built 1963 ADT: 85,175

EARLTON ROAD

Unknown

Over: IS 95

Milepost M88.4, Harford, MD

Built 1963 ADT: 85,175

MD 155

Unknown

Over: IS 95

Milepost M89.0, Harford, MD

Built 1959 ADT: 15,850

LAPIDUM ROAD

Unknown

Over: IS 95

Milepost M89.7, Harford, MD

Built 1963 ADT: 100

ROGERS AVE

Unknown

Over: IS 70

0.76 MILE EAST OF US 29, Howard, MD

Built 1966 ADT: 94,221

US 29 NBR

Unknown

Over: US 29 RAMP 'A' (07)

0.28 MI S OF US 40, Howard, MD

Built 1966 ADT: 15,892

US 29 NBR

Unknown

Over: FREDERICK ROAD

0.55 MI S OF US 40, Howard, MD

Built 1948 ADT: 10,355

US 29 SBR

Unknown

Over: FREDERICK ROAD

0.55 MI S OF US 40, Howard, MD

Built 1966 ADT: 10,355

US 29 NBR

Unknown

Over: US 40

0.28 M W OF RIDGE ROAD, Howard, MD

Built 1966 ADT: 54,680

US 29 SBR

Unknown

Over: US 40

0.28 M W OF RIDGE ROAD, Howard, MD

Built 1966 ADT: 54,680

RIDGE ROAD

Unknown

Over: US 29 RAMP 'H' (4)

@ US 29, Howard, MD

Built 1966 ADT: 4,356

IS 70 EBR

Unknown

Over: IS 70 RAMP 'G'(7)

0.23 MILE EAST OF US 29, Howard, MD

Built 1966 ADT: 30,502

US 29 NBR

Unknown

Over: IS 70 RAMP 'G'(7)

0.67 MI S OF MD 99, Howard, MD

Built 1966 ADT: 30,502

IS 70 EBR

Unknown

Over: MD 97

.45 MILE NORTH OF MD 144A, Howard, MD

Built 1973 ADT: 13,020

IS 70 WBR

Unknown

Over: MD 97

.45 MILE NORTH OF MD 144A, Howard, MD

Built 1973 ADT: 13,020

IS 70 EBR

Unknown

Over: MD 32

0.82 MILE SOUTH OF MD 99, Howard, MD

Built 1973 ADT: 23,832

IS 70 WBR

Unknown

Over: MD 32

0.82 MILE SOUTH OF MD 99, Howard, MD

Built 1973 ADT: 23,832

US 40 SB RAMP

Unknown

Over: US 40 EBR

0.13 MILE EAST OF US 29, Howard, MD

Built 2012 ADT: 54,680

US 40

Unknown

Over: PATAPSCO FOREST ROAD

0.52 MI W OF BALTIMORE CO, Howard, MD

Built 1936

ST JOHNS LANE

Unknown

Over: IS 70

0.8 MI W OF US 29, Howard, MD

Built 1966 ADT: 83,620

TRIDELPHIA ROAD

Unknown

Over: MD 32

0.36 M S OF TEN OAKS ROAD, Howard, MD

Built 1961 ADT: 28,072

US 29 NBR

Unknown

Over: IS 70

0.23 M W OF BR NO 1302000, Howard, MD

Built 1966 ADT: 95,957

US 29 SBR

Unknown

Over: IS 70

0.44 MI S OF MD 99, Howard, MD

Built 1966 ADT: 95,957

MD 100 EBR

Unknown

Over: IS 95

0.5 MILE NORTH OF MD 103, Howard, MD

Built 1970 ADT: 192,100

MD 100 WBR

Unknown

Over: IS 95

0.5 MILE NORTH OF MD 103, Howard, MD

Built 1970 ADT: 192,100

IS 95 NB

Unknown

Over: MD 103

0.71 MILE NORTH OF US I, Howard, MD

Built 1968 ADT: 8,201

IS 95 SB

Unknown

Over: MD 103

0.71 MILE NORTH OF US I, Howard, MD

Built 1968 ADT: 8,201

MONTGOMERY ROAD

Unknown

Over: IS 95

1.07 MILE SOUTH OF IS 895, Howard, MD

Built 1969 ADT: 192,100

BETHANY LANE

Unknown

Over: IS 70

1.61 MILE WEST OF US 29, Howard, MD

Built 1968 ADT: 83,620

MARRIOTTSVILLE RD

Unknown

Over: IS 70

0.82 MILE EAST OF US 40, Howard, MD

Built 1968 ADT: 83,620

US 40 WBR

Unknown

Over: IS 70

US 40 @ IS 70, Howard, MD

Built 1968 ADT: 62,680

MD 100 RAMP 'A'

Unknown

Over: IS 95

0.16 MILE NORTH OF MD 100, Howard, MD

Built 1970 ADT: 192,100

MD 100 EBR

Unknown

Over: MD 100 RAMP 'A'

0.92 MILE WEST OF US 1, Howard, MD

Built 1970 ADT: 15,864

MD 100 WBR

Unknown

Over: MD 100 RAMP 'A'

0.92 MILE WEST OF US 1, Howard, MD

Built 1970 ADT: 15,864

MD 175 EB

Unknown

Over: IS 95

1.38 M S OF MD 103, Howard, MD

Built 1970 ADT: 197,902

MD 175 WB

Unknown

Over: IS 95

1.28 M S OF MD 103, Howard, MD

Built 1970 ADT: 197,902

MD 32 RAMP 'B'(2)

Unknown

Over: GUILDFORD ROAD

1.30 MILES N OF IS 95I, Howard, MD

Built 1970 ADT: 15,711

IS 95 NBR

Unknown

Over: GUILDFORD ROAD

1.30 MILES N OF IS 95, Howard, MD

Built 1970 ADT: 15,711

GUILFORD ROAD

Unknown

Over: IS 95 SBR

1.74 MILES N OF US 1, Howard, MD

Built 1970 ADT: 187,920

IS 95 NBR

Unknown

Over: MD 32 WBR

0.68 M N/VOLLMERHAUSEN RD, Howard, MD

Built 1970 ADT: 91,311

MD 32 WBR

Unknown

Over: IS 95 SBR

0.14 M S OF GUILFORD ROAD, Howard, MD

Built 1970 ADT: 187,920

IS 95 NBR

Unknown

Over: MD 32 EBR

1.74 MILES NORTH OF US 1, Howard, MD

Built 1970 ADT: 91,311

MD 32 EBR

Unknown

Over: IS 95 SBR

0.14 MILE SOUTH OF MD 32, Howard, MD

Built 1970 ADT: 187,920

VOLLMERHAUSEN RD

Unknown

Over: IS 95 SBR

0.71 MILE SOUTH OF MD 32, Howard, MD

Built 1970 ADT: 186,750

GORMAN ROAD

Unknown

Over: IS 95

0.96 MILE NORTH OF MD 216, Howard, MD

Built 1970 ADT: 186,750

MD 216 EBR

Unknown

Over: IS 95

1.16 MILES N OF PG CO, Howard, MD

Built 1970 ADT: 186,750

MD 216 WBR

Unknown

Over: IS 95

1.16 MILES N OF PG CO, Howard, MD

Built 1970 ADT: 186,750

VOLLMERHAUSEN ROAD

Unknown

Over: MD32

0.9 MILE NORTH OF US 1, Howard, MD

Built 1971 ADT: 80,612

Showing 701-750 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.