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: UNKNOWN CREEK
W OF RECONNAISSANCE ST, Harford, MD
Over: PINEY CREEK
0.12 MI N OF KEYSVILLE RD, Carroll, MD
Over: DEAD RUN
200 FT E SECURITY BLVD, Baltimore, MD
Over: BIG ELK CREEK
2 MI. N OF MD RTE 273, Cecil, MD
Over: SAMS CREEK
WEST OF NEW WINDSOR, Carroll, MD
Over: CONOWINGO CREEK
0.03 MI N OF OLD CON RD, Cecil, MD
Over: LANES RUN
0.9 MI N OF US RTE 40, Washington, MD
Over: TOWNSEND/CENTREVILLE RR
0.5 MILES EAST OF MD 313, Queen Anne's, MD
Over: BIG HUNTING CREEK
WEST OF LAYMAN RD INT, Frederick, MD
Over: DEER CREEK
0.02 MILES NE OF MD 24, Harford, MD
Over: BEAVER CREEK
0.36 MI N OF MD RTE 64, Washington, MD
Over: LITTLE ANTIETAM CREEK
0.5 MI W OF MD RTE 67, Washington, MD
Over: CABIN JOHN CREEK
1.5 MI. E. OF I-495, Montgomery, MD
Over: OCTORARO CREEK
0.02 MI W OF HORSESHOE RD, Cecil, MD
Over: NYDEGGER RUN
0.32 MI NORTH OF MD 560, Garrett, MD
Over: LITTLE TONOLOWAY CREEK
0.16 MI N MD RT 144, Washington, MD
Over: ROCK BRANCH
0.7 MI N OF MD RTE 422, Anne Arundel, MD
Over: CATOCTIN CREEK
0.65 MI EAST OF MD 17, Frederick, MD
Over: TRIBUTARY OF OREGON BRAN
0.7 MI E OF FALLS RD, Baltimore, MD
Over: TRIBUTARY TO PATAPSCO RI
0.57 MI S OF MD 144, Baltimore, MD
Over: MINEBANK RUN
0.09 MI W CROMWELL BRDG R, Baltimore city, MD
Over: TOMS CREEK
2.0 MI NORTHEAST OF MD 76, Frederick, MD
Over: WEST BRANCH/WINTERS RUN
1.5 MILES E OF MD 165, Harford, MD
Over: KILGOUR BRANCH
1.5 MI WEST OF MD 189, Montgomery, MD
Over: ANTIETAM CREEK
0.8 MI NW OF MD RTE 34, Washington, MD
Over: LITTLE ANTIETAM CREEK
1.89 MI W OF MD RTE 67, Washington, MD
Over: DEER CREEK
1.6 MILES S OF US 1, Harford, MD
Over: CABBAGE RUN
1.39 MILES NORTH OF MD 26, Frederick, MD
Over: POTOMAC RIVER CSX TRANS
ON VIRGINIA STATE LINE, Washington, MD
Over: SEVERN RUN
0.64 MI E OF MD 174, Anne Arundel, MD
Over: BASIN RUN
0.01 MI NE OF DR JACK RD, Cecil, MD
Over: HUNTING CREEK
WEST OF OLD FREDERICK RD, Frederick, MD
Over: CATTAIL BRANCH
0.04 MI S GREEN LEAF RD, Prince George's, MD
Over: WESTERN RUN
0.3 MI S WESTERN RUN RD, Baltimore, MD
Over: TRIBUTARY TO PATAPSCO RI
0.08 MI W OF HMDS FERY RD, Baltimore, MD
Over: TRIBUTARY TO PATUXENT RI
0.17 MILES EAST OF US 1, Prince George's, MD
Over: ANTIETAM STREET
1000 FT W OF US RTE 40 E, Washington, MD
Over: GRANITE BRANCH
0.46 MI N OF DAVIS AVE, Baltimore, MD
Over: BASIN RUN
0.03 MI N OF BASIN RUN RD, Cecil, MD
Over: HOLLOW CREEK
1 MILE SOUTHEAST OF MD 17, Frederick, MD
Over: C&O CANAL
0.1 miles from Spring Gap, Allegany, MD
Over: BLUE BLAZES CREEK
US-15N WEST ON MC-77 TO, Frederick, MD
Over: WESTERN BRANCH
0.13 MILE NORTH OF MD 4, Prince George's, MD
Over: UNNAMED STREAM
0.40 MI NE OF MD 36, Allegany, MD
Over: SAW MILL BRANCH
0.04 MILES N OF GREENE RD, Harford, MD
Over: PATUXENT RIVER
TRACT #9 / CENTRAL TRACT, Anne Arundel, MD
Over: CABIN BRANCH
0.29 MI W OF MD 10, Anne Arundel, MD
Over: TRIBUTARY TO NORTH BRANC
1.28 MILES NW OF MD 30, Baltimore, MD
Over: MIDDLE CREEK
AT MD 17 INTERSECTION, Frederick, MD
Over: CATOCTIN CREEK
1.5 MI W OLD MIDDLETOWN R, Frederick, MD
Showing 1-50 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.