Total Bridges
5,484
Public highway bridges in Maryland
State profile · Below median Poor share
Maryland bridge safety
According to the Federal Highway Administration's 2024 National Bridge Inventory, condition ratings, load ratings, and Poor-condition shares for every public highway bridge in Maryland.
- 5,484
- Public bridges
- 32.3%
- Good condition
- 4.6%
- Poor condition
Maryland holds 5,484 public highway bridges (#34 of 52 by inventory) with a 4.56% Poor share (#38 of 52 by Poor share).
That is 4.6% of the state's inventory, against an average of 7.5% across the 54 states and territories with Poor-rated bridges on file, which places it 15 of 54 ordered from the lowest Poor share upward. A bridge is rated Poor when its weakest applicable component scores 4 or below on the inspecting agency's 0-9 scale, so the category is a maintenance and funding signal rather than a closure order or a live crossing-safety verdict.
Inventory: FHWA NBI 2024 · last ETL August 2026
Good Condition
32.3%
1,771 bridges rated 7-9
-17.7pp vs 50% benchmark
Poor Condition
4.6%
250 bridges whose lowest applicable component is rated 0-4
-3.0pp vs national avg 7.5%
Maryland vs national bridge condition
Maryland - Good condition share 32.3%
National avg
Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).
Maryland - Poor-condition share 15.2%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.5%.
Maryland in the national condition pattern
Each point is a state or territory in the FHWA NBI; the highlighted point is this profile.
Maryland vs all states by public bridge inventory
Where this state's FHWA NBI public-highway bridge count sits among every state and territory on PlainBridges
5,484 34th of 54 higher than 20 of 54 states
States and territories, banded by public bridge inventory size
Each bar is a band; taller bars hold more states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · 2024
Read the rank neighborhood for Maryland
The highlighted point is Maryland: 5,484 bridges and 4.56% in Poor condition, rank #15 of 54 jurisdictions ordered from the lowest share upward. The five jurisdictions immediately above and below Maryland on that same Poor-share ordering:
- Minnesota: 13,532 bridges · 4.44% Poor
- New Mexico: 4,035 bridges · 4.51% Poor
- Maryland: 5,484 bridges · 4.56% Poor
- Oregon: 8,305 bridges · 4.61% Poor
- Connecticut: 4,365 bridges · 4.72% Poor
The full national sortable table lives on the rankings page.
Material families in Maryland
Exclusive FHWA material families across all 5,484 bridges in this state; continuous variants fold into the parent family. Orthogonal to the Poor-share scatter above.
Who maintains Maryland’s inventory
State agency holds 53.4% of the 5,484 public highway bridges filed under Maryland in the 2024 NBI, the agency-of-record split for this state, not a condition verdict.
When Maryland’s bridges were built
Pre-1950 construction accounts for 15.9% of the 5,484 bridges with a recorded original year in Maryland. Era bands are orthogonal to the Poor-share ranking above.
Condition Distribution
Counties (24)
Allegany 245 Anne Arundel 389 Baltimore 783 Baltimore city 374 Calvert 33 Caroline 70 Carroll 205 Cecil 193 Charles 94 Dorchester 47 Frederick 486 Garrett 139 Harford 275 Howard 309 Kent 44 Montgomery 515 Prince George's 576 Queen Anne's 88 Somerset 46 St. Mary's 50 Talbot 42 Washington 300 Wicomico 99 Worcester 82
Maryland vs nearby ranks
Adjacent states by Poor-condition share (lower share = better)
States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below Maryland on the same metric.
MN
Minnesota
4.44% top marginal rate
NM
New Mexico
4.51% top marginal rate
MD
Maryland
4.56% top marginal rate
OR
Oregon
4.61% top marginal rate
CT
Connecticut
4.72% top marginal rate
Bridges Needing Most Attention in Maryland
Six lowest-condition bridges in Maryland, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.
WASHINGTON STREET
PoorOver: CSXT RAILROAD
0.2 MI W OF CUMBERLAND ST, Allegany, MD
Built 1930 Load: 0.0 t ADT: 110
CUMBERLAND STREET
PoorOver: CSXT RAILROAD
0.6 MI E OF WASHINGTON ST, Allegany, MD
Built 1929 Load: 0.0 t ADT: 110
MILL STREET
PoorOver: ROCK RUN
.01 MI S. OF RACE STREET, Cecil, MD
Built 1940 Load: 0.0 t ADT: 100
BACK LANDING ROAD
PoorOver: HUNTING CREEK
ON CAROLINE COUNTY LINE, Dorchester, MD
Built 1941 Load: 0.0 t
TALBOT AVENUE
PoorOver: CSXT RAILROAD
0.2 MI E OF MICHIGAN AVE, Montgomery, MD
Built 1918 Load: 0.0 t ADT: 1,430
TAYLOR MILL ROAD
PoorOver: OLD MILL STREAM BRANCH
0.7 MILE EAST OF MD 213, Queen Anne's, MD
Built 1955 Load: 0.0 t ADT: 100
All Bridges in Maryland
HIGHLAND STREET
FairOver: CARROLL CREEK
0.9 MI EAST OF MD 355, Frederick, MD
Built 1988 Load: 99.9 t ADT: 5,850
OLD CAMP ROAD
FairOver: ROCK CREEK
500 FEET NORTH OF US 40, Frederick, MD
Built 1976 Load: 99.9 t ADT: 6,930
WILLOWDALE DRIVE
FairOver: ROCK CREEK
0.4 MI NORTH OF US 40, Frederick, MD
Built 1976 Load: 99.9 t ADT: 11,232
BAUGHMANS LANE
FairOver: CARROLL CREEK
100 S. OF ROSEMONT AVE., Frederick, MD
Built 1961 Load: 99.9 t ADT: 20,388
BAUGHMANS LANE
FairOver: ROCK CREEK
1 MILE NORTH OF US 40, Frederick, MD
Built 1970 Load: 99.9 t ADT: 20,388
WAVERLY DRIVE
FairOver: ROCK CREEK
0.5 MILES NORTH OF US 40, Frederick, MD
Built 1971 Load: 99.9 t ADT: 5,382
BEL AIRE LANE
FairOver: ROCK CREEK
0.2 MI NORTH OF KEY PKWY, Frederick, MD
Built 1993 Load: 99.9 t ADT: 2,144
SCHIFFERSTADT BOUL
FairOver: TRIBUTARY NO. 8
0.8 MI EAST OF MD 355, Frederick, MD
Built 1986 Load: 99.9 t ADT: 3,310
SCHIFFERSTADT BOUL
FairOver: DETRICK BRANCH
300 FEET EAST OF MD 355, Frederick, MD
Built 1990 Load: 99.9 t ADT: 3,310
THOMAS JOHNSON DRI
FairOver: TWO MILE RUN
2000 FT NE OF OPOSSUMTOWN, Frederick, MD
Built 1981 Load: 99.9 t ADT: 9,570
GLENBROOK DRIVE
FairOver: HOLLOW CREEK
0.2 MI S OF MIDDLETWN PWY, Frederick, MD
Built 2004 Load: 99.9 t ADT: 1,115
HERRINGTON MANOR R
FairOver: HERRINGTON CREEK
1.3MI S OF SWALLOW FALLS, Garrett, MD
Built 1970 Load: 99.9 t ADT: 1,069
COOL SPRING ROAD
FairOver: TOBACCO RUN
0.8 MILES W OF MD 136, Harford, MD
Built 1981 Load: 99.9 t ADT: 1,545
PLUMTREE ROAD
FairOver: PLUMTREE RUN
0.9 MILES W OF MD 24, Harford, MD
Built 1900 Load: 99.9 t ADT: 151
THOMAS RUN ROAD
FairOver: TRIB / THOMAS RUN
2.1 MILES NE OF MD 543, Harford, MD
Built 1973 Load: 99.9 t ADT: 1,690
BURNT HILL TRAIL
FairOver: TRIB GRAYS RUN
0.5 MILES N. OF MD 7, Harford, MD
Built 2008 Load: 99.9 t ADT: 515
HENDERSON ROAD
FairOver: TRIB / BYNUM RUN
0.1 MILES W OF MD 543, Harford, MD
Built 1990 Load: 99.9 t ADT: 1,759
BYNUM RIDGE ROAD
FairOver: BYNUM RUN
0.2 MILES E OF BYNUM RD, Harford, MD
Built 1975 Load: 99.9 t ADT: 827
OLD JOPPA ROAD
FairOver: TRIB / GUNPOWDER FALLS
100 FT S OF GREENSPRING A, Harford, MD
Built 1960 Load: 99.9 t ADT: 232
ECON DRIVE
FairOver: TRIB / BYNUM RUN
100 FT N MOORES MILL RD, Harford, MD
Built 1982 Load: 99.9 t ADT: 1,623
TODD ROAD
FairOver: TRIB / BYNUM RUN
0.4 MILES NE OF BRIERHILL, Harford, MD
Built 2003 Load: 99.9 t ADT: 165
OAKLAND MILLS ROAD
FairOver: ELKHORN BRANCH OF LITTLE
1.0 M N Snowden River Pkw, Howard, MD
Built 1975 Load: 99.9 t ADT: 13,335
FREDERICK ROAD
FairOver: PLUMTREE BRANCH
1.0 MI W. OF MD RTE 29, Howard, MD
Built 1981 Load: 99.9 t ADT: 10,927
TAMAR DRIVE
FairOver: DORSEY RUN
0.1 MI W OF OLD MONGOMER, Howard, MD
Built 1989 Load: 99.9 t ADT: 11,824
SUMMER CLOUD WAY
FairOver: DORSEY RUN
0.3 MI W OF MD RTE 108, Howard, MD
Built 1990 Load: 99.9 t ADT: 605
NORTH CHATHAM LANE
FairOver: UNNAMED STREAM
AT PAULSKIRK DRIVE, Howard, MD
Built 1992 Load: 99.9 t ADT: 2,840
LITTLE PATUXENT PA
FairOver: WILDE LAKE BRANCH
0.2 MI N OF GOV WARFIELD, Howard, MD
Built 1967 Load: 99.9 t ADT: 31,936
BUCKSKIN LAKE DRIV
FairOver: BENSON BRANCH
.01 MI S FOLLY QUARTER RD, Howard, MD
Built 1985 Load: 99.9 t ADT: 395
MAPLE LAWN BOULEVA
FairOver: TRIBURATY TO HAMMOND BRA
700 FT S OF J HOPKINS RD, Howard, MD
Built 2006 Load: 99.9 t ADT: 7,155
MAPLE LAWN BOULEVA
FairOver: HAMMOND BRANCH
1000 FT S OF J HOPKINS RD, Howard, MD
Built 2005 Load: 99.9 t ADT: 7,155
AMBERWOODS WAY
FairOver: TRIB S BR PATAPSCO RIVER
1000 FT WEST OF MD 32, Howard, MD
Built 2000 Load: 99.9 t ADT: 50
COVENTRY MEADOWS D
FairOver: TRIB S BR PATAPSCO RIVER
2500 W of Sykesville Rd, Howard, MD
Built 2000 Load: 99.9 t ADT: 20
HIGH STEPPER TRAIL
FairOver: TRIB S BR PATAPSCO RIVER
1000 ft East of River Rd, Howard, MD
Built 2000 Load: 99.9 t ADT: 20
HUNT VALLEY DRIVE
FairOver: TRIBUTARY TO LITTLE CATT
1000 S of Union Chapel, Howard, MD
Built 1995 Load: 99.9 t ADT: 20
TURF VALLEY ROAD
FairOver: LITTLE PATUXENT RIVER
1/4 MI N OF US 40, Howard, MD
Built 1980 Load: 99.9 t ADT: 1,000
GOVERNORS RUN LAN
FairOver: SUCKER BRANCH
1/4 MI SOUTH OF US 40, Howard, MD
Built 1980 Load: 99.9 t ADT: 150
MARTIN ROAD
FairOver: TRIB TO LITTLE PATUXENT
At Quarterstaff Rd, Howard, MD
Built 1972 Load: 99.9 t ADT: 500
N. LAUREL ROAD
FairOver: UNNAMED STREAM
1/8 M WEST OF US 1, Howard, MD
Built 1965 Load: 99.9 t ADT: 400
MUDDY BRANCH ROAD
FairOver: MUDDY BRANCH
1 MI N GREAT SENECA HWY, Montgomery, MD
Built 1987 Load: 99.9 t ADT: 24,785
MUDDY BRANCH ROAD
FairOver: SHADY BRANCH
0.5 MILES NORTH OF MD 28, Montgomery, MD
Built 1987 Load: 99.9 t ADT: 24,739
BRIGGS CHANEY ROAD
FairOver: PAINT BRANCH
2.4 MILES EAST OF MD 650, Montgomery, MD
Built 1974 Load: 99.9 t ADT: 20,551
BRIGGS CHANEY ROAD
FairOver: LITTLE PAINT BRANCH TRIB
1 MI EAST OF US 29, Montgomery, MD
Built 1994 Load: 99.9 t ADT: 12,450
HOWARD CHAPEL ROAD
FairOver: HAIGHTS BRANCH
1.7 MI NORTH OF MD 650, Montgomery, MD
Built 1963 Load: 99.9 t ADT: 580
HAWKINS CREAMERY R
FairOver: GREAT SENECA CREEK
1.3 MILES WEST OF MD 108, Montgomery, MD
Built 1961 Load: 99.9 t ADT: 550
DEMOCRACY BOULEVAR
FairOver: CABIN JOHN CREEK
.1 MI E OF SEVEN LOCKS RD, Montgomery, MD
Built 1967 Load: 99.9 t ADT: 31,775
TILDEN LANE
FairOver: OLD FARM CREEK
1.2 MILES WEST OF MD 187, Montgomery, MD
Built 1972 Load: 99.9 t ADT: 6,533
JONES MILL ROAD
FairOver: COQUELIN RUN
0.5 MILES NORTH OF MD 410, Montgomery, MD
Built 1949 Load: 99.9 t ADT: 7,542
MONTGOMERY VILLAGE
FairOver: CABIN BRANCH
2.2 MI N OF JCT SR MD 355, Montgomery, MD
Built 1972 Load: 99.9 t ADT: 31,900
RANDOLPH ROAD
FairOver: NORTHWEST BRANCH
0.1 MI E OF KEMP MILL RD, Montgomery, MD
Built 1976 Load: 99.9 t ADT: 60,342
DEMOCRACY BLVD
FairOver: BUCK BRANCH TRIBUTARY
1.5 MI E OF JCT SR MD 189, Montgomery, MD
Built 1989 Load: 99.9 t ADT: 16,800
Showing 3,351-3,400 of 5,484 bridges
Related
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges.
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). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.
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.
What to do with this
Use Maryland's inventory picture to drill to a county or a specific span.
- Browse counties in Maryland and open the highest-Poor shares first. County list
- See where this state sits among peers on Poor-condition share. State rankings
- Compare this state with another jurisdiction on the same measures. State compare
NBI condition ratings are inventory snapshots, not live crossing-safety verdicts.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Maryland Good/Fair/Poor shares and county rollups on this page are computed from the same NBI extract as the national boards; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.