Total Bridges
5,484
Public highway bridges in Maryland
State profile · Below median Poor share
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.
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
Total Bridges
5,484
Public highway bridges in Maryland
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%
Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.5%.
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
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:
The full national sortable table lives on the rankings page.
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.
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.
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.
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
NM
MD
OR
CT
Six lowest-condition bridges in Maryland, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.
Over: CSXT RAILROAD
0.2 MI W OF CUMBERLAND ST, Allegany, MD
Over: CSXT RAILROAD
0.6 MI E OF WASHINGTON ST, Allegany, MD
Over: ROCK RUN
.01 MI S. OF RACE STREET, Cecil, MD
Over: HUNTING CREEK
ON CAROLINE COUNTY LINE, Dorchester, MD
Over: CSXT RAILROAD
0.2 MI E OF MICHIGAN AVE, Montgomery, MD
Over: OLD MILL STREAM BRANCH
0.7 MILE EAST OF MD 213, Queen Anne's, MD
Over: HERRING RUN
0.2 MI W HARFORD RD, Baltimore city, MD
Over: UNNAMED TRIBUTARY
KINGSVIEW SUBDIVISION, Charles, MD
Over: CATOCTIN CREEK
0.5 MI SOUTH OF ALT US 40, Frederick, MD
Over: TOMS CREEK
0.4 MI SOUTH OF GRIMES RD, Frederick, MD
Over: TRIBUTARY OF BALLENGER C
W OF BALLENGER CREEK PIKE, Frederick, MD
Over: TRIBUTARY TO LITTLE GUNP
0.3 MILES N OF MD 7, Harford, MD
Over: HAMMONDS BRANCH
0.2 MI S OF GORMAN RD, Howard, MD
Over: COLLINGTON BRANCH
1.2 MILES WEST OF US 301, Prince George's, MD
Over: LITTLE MILL CREEK
0.38 MI EAST OF MD 371, Worcester, MD
Over: BOXIRON CREEK
2.54 MI SE OF MD 12, Worcester, MD
Over: I-95
Milepost M67.9, Baltimore, MD
Over: PATAPSCO RIVER FLATS
I-895 Mileposts 5.3-5.9, Baltimore, MD
Over: MD 97
0.35 MILE SOUTH OF MD 31, Carroll, MD
Over: MD 30
HOUCKSVILLE RD OVER MD 30, Carroll, MD
Over: MD 331 & DP & L RR
.82 M W OF WICOMICO CO LN, Dorchester, MD
Over: MD 331 & DP & L RR
.82 M W OF WICOMICO CO LN, Dorchester, MD
Over: IS 270
1.03 MI N OF MD 85, Frederick, MD
Over: LONG GREEN CREEK
0.03 MI S OF LONG GRN RD, Baltimore, MD
Over: HORSEHEAD BRANCH
1.55 MI N. OF RT. 26, Baltimore, MD
Over: CSX GWYNNS FALLS
1.1 MI E. OF MD 140, Baltimore, MD
Over: SNOWY CREEK
0.1 MI W INT CRELLIN ST R, Garrett, MD
Over: INDIAN CREEK
1.0 MILE WEST OF US 1, Prince George's, MD
Over: I-95 Ramps G & H
3.2mi N of I-695/I-95, Baltimore, MD
Over: Bonifant Road & NW Branc
2.07 Mi. West of MD650, Montgomery, MD
Over: MATAPONI CREEK
.3 MI S ST THOMAS CHUR RD, Prince George's, MD
Over: MARSH RUN
0.68 MI S OF BAKERSVILLE, Washington, MD
Over: MARSH RUN
0.07 MI S OF BAKERSVILLE, Washington, MD
Over: IS 97
AT IS 97, Anne Arundel, MD
Over: PADONIA ROAD
1.42 M N OF TIMONIUM ROAD, Baltimore, MD
Over: CSX RAILROAD
0.05 MI E OF US 40, Baltimore, MD
Over: IS 270 RAMP B
AT I-270/I-270 SPUR SPLIT, Montgomery, MD
Over: RAMP Q
I-295 S Ramp to I-95/495, Prince George's, MD
Over: MD 903
1.54 M E OF ALLEGANY CO, Washington, MD
Over: CSX RAILROAD
0.1 MI E HANOVER PIKE, Baltimore, MD
Over: TRIBUTARY TO PINEY RUN
0.3 MI N OF DOVER ROAD, Baltimore, MD
Over: LITTLE FALLS
0.8 MI NE OF MIDDLETOWN R, Baltimore, MD
Over: SANDY BRANCH
0.05 MI S OF MIDDLE N RD, Cecil, MD
Over: ALLOWAY CREEK
.7 M N OF BOWERS ROAD, Carroll, MD
Over: MIDDLE PATUXENT RIVER
.02 Mi N of MD 32, Howard, MD
Over: MD200 Ramp I-B
1.6 miles south of MD198, Prince George's, MD
Over: US 15
1 MI N OF MD 26, Frederick, MD
Over: UNNAMED TRIBUTARY TO SEV
.7 MI S OF ROUTE 3, Anne Arundel, MD
Over: LITTLE PATUXENT RIVER
NORTH TRACT, Anne Arundel, MD
Over: STONY RUN
0.5 MI W OF MD 170, Anne Arundel, MD
Over: MD 940 RAMP 7
0.28 MI S OF MD 940, Baltimore, MD
Over: US 29 NBR
0.24 MILE SOUTH OF MD 103, Howard, MD
Over: SNOWDEN RIVER PARKWAY
0.84 MILE WEST OF MD 108, Howard, MD
Over: MD 198
1.53 M S OF HOWARD CO LNE, Montgomery, MD
Over: IS 95
1.0 MI N OF MD 200, Prince George's, MD
Over: COWHIDE BRANCH
ANNE ARUNDEL MEDICAL PARK, Anne Arundel, MD
Showing 4,401-4,450 of 5,484 bridges
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.
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.