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: HAWLINGS RIVER
2.0 MILES EAST OF MD 108, Montgomery, MD
Over: HOURLY PARKING GARAGE
BWI HOURLY PARK GARAGE, Anne Arundel, MD
Over: QUAKER BOTTOM ROAD
0.9 M N OF BR NO 0305600, Baltimore, MD
Over: LITTLE PATUXENT RIVER
0.23 M S OF SHAKER DRIVE, Howard, MD
Over: LITTLE CATOCTIN CREEK
0.25 MI EAST OF MD RTE 17, Frederick, MD
Over: CRICKETT CREEK
1.0 Mile SE of MD 108, Howard, MD
Over: UNICORN BRANCH
0.8 MI. E. OF MD313, Queen Anne's, MD
Over: GEORGES CREEK
0.13 MI W OF MD 936, Allegany, MD
Over: LEEDS AVE & HERBERT RUN
0.77 MILE NORTH OF IS 95, Baltimore, MD
Over: ISRAEL CREEK
1 MI E OF MD RTE 194, Frederick, MD
Over: UNNAMED STREAM
400 FT NW OF ROGERS AVE, Howard, MD
Over: BENNETT CREEK TRIBUTARY
0.2 MI W BETHESDA CH RD, Montgomery, MD
Over: BRANCH OF CHESAPEAKE BAY
0.28 MI. N OF 7TH ST., Calvert, MD
Over: TRIBUTARY OF BYNUM RUN
0.1 MI. E. of Tyrell Ct, Harford, MD
Over: ROCKBURN BRANCH
AT ROCKBURN RD, Howard, MD
Over: BRADDOCK RUN
N OF MD 53, Allegany, MD
Over: IS 695
3.0 MI N OF IS 95, Baltimore, MD
Over: CLEMSON BRANCH
0.5 MI E OF CLEMSONVILLE, Frederick, MD
Over: TUSCARORA CREEK
0.1 MI N OF OPOSSUMTWN PK, Frederick, MD
Over: AMTRAK
0.03 MILE S OF MD 564C, Prince George's, MD
Over: MD 414 (OXON HILL ROAD)
0.1 M S OF IS 95/IS 495, Prince George's, MD
Over: FERRY BRANCH
0.2 MI S OF MD 422, Anne Arundel, MD
Over: HOLLOW CREEK
0.34 MI SOUTH OF MD 17, Frederick, MD
Over: MOUNT NEBO BRANCH
0.21 MI N OF MD RTE 214, Prince George's, MD
Over: MD200 (ICC)
0.7 mi E OF REDLAND RD, Montgomery, MD
Over: IS 68
0.07 MILE NORTH OF MD 144, Allegany, MD
Over: SOUTH BRANCH GUNPOWDER F
150 FT N OF TRACEYS MILL, Carroll, MD
Over: DORSEY BRANCH
0.5 MI N OF SHARP RD, Howard, MD
Over: MD 450
0.33 MI N OF IS 595, Anne Arundel, MD
Over: MD 450
0.36 MILE NORTH OF IS 595, Anne Arundel, MD
Over: IS 83
0.83 MI S OF BEAVERDAM RD, Baltimore, MD
Over: MIDDLE PATUXENT RIVER
0.89 MILE NORTH OF US 29, Howard, MD
Over: LITTLE CATOCTIN CREEK
0.2 MI N OF WOODLAND WAY, Frederick, MD
Over: MUDDY BRANCH
AT QUERY MILL ROAD, Montgomery, MD
Over: DORSEY CREEK
0.3 KM E OF DECATUR AVE, Anne Arundel, MD
Over: SILVER CREEK
0.4 MILES EAST OF MD 185, Montgomery, MD
Over: BIG ELK CREEK
0.1 MILE SOUTH OF MD 7D, Cecil, MD
Over: PATUXENT RIVER
ON MONTGOMERY CO LINE, Howard, MD
Over: US 50
0.561 M W/NAYLOR MILL RD, Wicomico, MD
Over: AIRPORT RETURN RAMP
BWI AIRPORT, Anne Arundel, MD
Over: MD 25A
0.36 MI N OF MD 25, Baltimore, MD
Over: JAMES RUN
0.28 MILE NORTH OF MD 136, Harford, MD
Over: MD 100
.11 M N OF MEADOWBROOK LA, Howard, MD
Over: IS 595 & CD ROAD E-W
MD 3 US 301 IS 595 INT, Prince George's, MD
Over: IS 595 AND CD ROAD E-W
MD 3 US 301 IS 595 INT, Prince George's, MD
Over: KING BRANCH
.1 MI S. OF CORPORATE DR, Frederick, MD
Over: WELDON CREEK
0.9 MI S OF OAK ORCHRD RD, Frederick, MD
Over: DEEP RUN
0.4 MI N MD 176 HO/AA CO., Howard, MD
Over: LITTLE GUNPOWDER FALLS
ON HARFORD CO LINE, Baltimore, MD
Over: LITTLE GUNPOWDER FALLS
ON HARFORD CO LINE, Baltimore, MD
Showing 4,851-4,900 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.