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
MD 225
FairOver: BR OF PORT TOBACCO CREEK
1.81 MILES WEST OF US 301, Charles, MD
Built 1950 Load: 99.9 t ADT: 12,100
US 15 BU
FairOver: TOMS CREEK
0.23 MILE NORTH OF US 15, Frederick, MD
Built 1923 Load: 99.9 t ADT: 7,680
US 15 & RAMP 8
FairOver: CARROLL CREEK
0.64 MILE NORTH OF US 40, Frederick, MD
Built 1958 Load: 99.9 t ADT: 95,190
MD 26
FairOver: N FORK LINGANORE CREEK
2.53 MI W OF CARROLL CO, Frederick, MD
Built 1950 Load: 99.9 t ADT: 5,272
US 340
FairOver: LITTLE CATOCTIN CREEK
0.36 MILE EAST OF MD 17, Frederick, MD
Built 1964 Load: 99.9 t ADT: 24,600
IS 70
FairOver: GRINDSTONE RUN
0.3 MILE WEST OF MD 17, Frederick, MD
Built 1968 Load: 99.9 t ADT: 70,011
IS 70
FairOver: LONG BRANCH
0.23 M E OF BR NO 1018400, Frederick, MD
Built 1985 Load: 99.9 t ADT: 62,311
MD 42
FairOver: BUFFALO RUN
1.02 MILES N OF MD 42A, Garrett, MD
Built 1933 Load: 99.9 t ADT: 2,055
IS 68/US 219
FairOver: BIG SHADE RUN
0.73 MILE WEST OF MD 495, Garrett, MD
Built 1975 Load: 99.9 t ADT: 16,541
MD 543
FairOver: JAMES RUN
1.23 MILE SOUTH OF MD 136, Harford, MD
Built 1988 Load: 99.9 t ADT: 18,082
MD 24F
FairOver: HEAVENLY WATERS
0.18 MILE SOUTH OF MD 24, Harford, MD
Built 1987 Load: 99.9 t ADT: 23,140
MD 24
FairOver: PLUMTREE RUN
0.38 MILE SOUTH OF US 1BU, Harford, MD
Built 1987 Load: 99.9 t ADT: 35,300
MD 24
FairOver: PLUMTREE RUN
0.86 M N OF PLUMTREE ROAD, Harford, MD
Built 1987 Load: 99.9 t ADT: 37,310
MD 24
FairOver: PLUMTREE RUN
0.57 M N OF PLUMTREE ROAD, Harford, MD
Built 1987 Load: 99.9 t ADT: 37,310
US 1
FairOver: DEEP RUN
0.56 MILE NORTH OF MD 175, Howard, MD
Built 1929 Load: 99.9 t ADT: 29,180
US 1 SB
FairOver: LITTLE PATUXENT RIVER
0.38 MILE SOUTH OF MD 32, Howard, MD
Built 1900 Load: 99.9 t ADT: 20,330
MD 32
FairOver: BR OF PATAPSCO RIVER
0.49 MILE S OF MD 851F, Howard, MD
Built 1958 Load: 99.9 t ADT: 23,612
US 1 NBR
FairOver: RACE TRACK RD
0.06 MI N OF PG CO LINE, Howard, MD
Built 1949 Load: 99.9 t ADT: 16,190
IS 95 & RAMPS 2 &
FairOver: HAMMOND BRANCH
0.38 MILE NORTH OD MD 216, Howard, MD
Built 1968 Load: 99.9 t ADT: 192,401
IS 70 RAMP 6
FairOver: TERRAPIN BRANCH
0.06 MILE WEST OF MD 32, Howard, MD
Built 1972 Load: 99.9 t ADT: 5,972
MD 99
FairOver: DAVIS BRANCH
0.4 M E OF TAYLOR FARM RD, Howard, MD
Built 1986 Load: 99.9 t ADT: 5,971
MD 108
FairOver: CRICKET CREEK
0.85 MILE WEST OF MD 32, Howard, MD
Built 1912 Load: 99.9 t ADT: 12,830
MD 32
FairOver: BR OF TERRAPIN BRANCH
0.10 MILE SOUTH OF IS 70, Howard, MD
Built 1958 Load: 99.9 t ADT: 22,492
MD 100
FairOver: BR OF DEEP RUN
0.83 MILE EAST OF MD 104, Howard, MD
Built 1998 Load: 99.9 t ADT: 89,660
US 29 RAMPS I(7) &
FairOver: BEAVER RUN
0.67 MIle North OF MD 32, Howard, MD
Built 1992 Load: 99.9 t ADT: 3,132
MD 32
FairOver: CRICKET CREEK
0.88 MILE SOUTH OF MD 108, Howard, MD
Built 1994 Load: 99.9 t ADT: 45,660
MD 175
FairOver: BR OF LITTLE PATUXENT RI
2.1 MILE NORTH OF MD 108, Howard, MD
Built 1977 Load: 99.9 t ADT: 44,142
MD 213
FairOver: BR OF MORGAN CREEK
.507 MILE SOUTH OF MD 561, Kent, MD
Built 1955 Load: 99.9 t ADT: 4,632
MD 291
FairOver: BR OF CHESTER RIVER
0.5 MILE EAST OF MD 298, Kent, MD
Built 1962 Load: 99.9 t ADT: 3,571
MD 20
FairOver: TRIB TO GREYS INN CREEK
0.05 miles west of MD 674, Kent, MD
Built 1960 Load: 99.9 t ADT: 1,230
MD 108
FairOver: PATUXENT RIVER
ON HOWARD CO LINE, Montgomery, MD
Built 1928 Load: 99.9 t ADT: 12,871
IS 270
FairOver: LITTLE SENECA CREEK
1.85 south of MD 121, Montgomery, MD
Built 1954 Load: 99.9 t ADT: 98,097
IS 270
FairOver: OLD FARM CREEK
0.13 MILE N OF IS 270Y, Montgomery, MD
Built 1958 Load: 99.9 t ADT: 265,320
MD 117
FairOver: LITTLE SENECA CREEK
1.03 MILES EAST OF MD 121, Montgomery, MD
Built 1953 Load: 99.9 t ADT: 7,457
MD 190
FairOver: WATTS BRANCH
3.42 MILES WEST OF MD 189, Montgomery, MD
Built 1949 Load: 99.9 t ADT: 15,240
IS 495
FairOver: SLIGO CREEK
0.55 MILE EAST OF MD 97, Montgomery, MD
Built 1960 Load: 99.9 t ADT: 232,010
IS 495
FairOver: BR OF ROCK CREEK
0.6 MILE EAST OF MD 355, Montgomery, MD
Built 1958 Load: 99.9 t ADT: 238,050
MD 28
FairOver: BRANCH OF ROCK CREEK
0.55 MILE EAST OF MD 911, Montgomery, MD
Built 1969 Load: 99.9 t ADT: 34,390
MD 586
FairOver: BRANCH OF ROCK CREEK
0.06 M E OF ANDREW STREET, Montgomery, MD
Built 1956 Load: 99.9 t ADT: 37,752
MD 124
FairOver: WHETSTONE RUN
0.447 M S of Midcounty, Montgomery, MD
Built 1986 Load: 99.9 t ADT: 23,621
MD 929A
FairOver: US 29 FUTURE RAMP E
0.033 MILE WEST OF US 29, Montgomery, MD
Built 2006 Load: 99.9 t ADT: 36,072
MD 5
FairOver: HENSON CREEK
0.17 MILE N OF MD 967C, Prince George's, MD
Built 1950 Load: 99.9 t ADT: 66,772
US 301
FairOver: CHARLES BRANCH
0.24 MILE SOUTH OF MD 382, Prince George's, MD
Built 1950 Load: 99.9 t ADT: 31,962
US 301 NB
FairOver: TIMOTHY BRANCH
0.66 MI N OF CHARLES CO, Prince George's, MD
Built 1950 Load: 99.9 t ADT: 82,362
US 301 SB
FairOver: TIMOTHY BRANCH
0.66 MI N OF CHARLES CO, Prince George's, MD
Built 1950 Load: 99.9 t ADT: 82,362
MD 193
FairOver: INDIAN CREEK
0.28 MILE EAST OF MD 430, Prince George's, MD
Built 1942 Load: 99.9 t ADT: 42,890
MD 193
FairOver: BRANCH OF INDIAN CREEK
AT MD 430, Prince George's, MD
Built 1962 Load: 99.9 t ADT: 45,930
MD 201
FairOver: BEAVERDAM CREEK
1.13 MILES S OF MD 212, Prince George's, MD
Built 1941 Load: 99.9 t ADT: 33,580
IS 95
FairOver: HENSON CREEK
0.67 MILE SOUTH OF MD 5, Prince George's, MD
Built 1963 Load: 99.9 t ADT: 143,828
IS 95
FairOver: HENSON CREEK
0.71 MILE SOUTH OF MD 4, Prince George's, MD
Built 1962 Load: 99.9 t ADT: 185,190
Showing 3,201-3,250 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.