County profile · official public datasets

Baltimore city County, MD

374 public highway bridges tracked in the FHWA National Bridge Inventory: 16% rated Good, 75.4% Fair, 8.6% Poor.

374
Public bridges
16%
Good condition
8.6%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Baltimore city County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.

21st
of 24 on Poor share
8.6%
Poor-condition share
374
public highway bridges
1964
avg year built

Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.

Baltimore city County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Baltimore city County ranks #21 of 24 Maryland counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 8.6%). Baltimore city County, Maryland contains 374 public highway bridges. Roughly 16% are rated “Good,” 75.4% “Fair,” and 8.6% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

Total bridges

374

Public highway bridges in Baltimore city County

Good condition

16%

60 of 374 rated 7-9

Fair condition

75.4%

282 of 374 rated 5-6

Poor condition

8.6%

32 of 374 rated 4 or below

In-state Poor-share rank

#21 of 24

Among Maryland counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 374 NBI-tracked bridges by lowest applicable component rating.

Good
16% (60)
Fair
75.4% (282)
Poor
8.6% (32)

Baltimore city County's Poor-condition bridges carry 696,357 vehicle crossings a day

That is 6.8% of the county's reported daily bridge traffic on 8.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 21,761 crossings a day against 24,974 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.

Computed over the 374 of 374 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

56.4% of Baltimore city County's bridges have passed the 50-year mark

211 of the 374 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 16% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.

Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.

One structure carries 10.7% of the county's Poor-condition bridge traffic

PERRING PKWY RAMP over HERRING RUN, built 1965, carries 74,402 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 32-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 696,357 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Baltimore city County's bridges were built

374 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1970s, when 107 of the county's bridges still in the inventory were built, which is 28.6% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year is 1964, 8 years older than the Maryland average of 1972.

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Baltimore city County compares with Maryland's closest counties by inventory size

The 5 Maryland counties nearest Baltimore city County in number of bridges, with their condition splits. Its 8.6% Poor share is the 6th-lowest of these 6. Its average build year of 1964 against a peer-group mean of 1972 is 8 years older.

Showing the 5 closest of 23 Maryland counties eligible for comparison.

Bridge inventory size and condition shares for Baltimore city County and the 5 Maryland counties closest to it in inventory size
County Bridges Poor
Frederick County 486 2.7%
Anne Arundel County 389 1.5%
Baltimore city County (this page) 374 8.6%
Howard County 309 5.8%
Washington County 300 4.7%
Harford County 275 4.7%

Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Baltimore city County's. Source: FHWA National Bridge Inventory, 2024 release.

Nationwide counties with similar inventory size or average build year

Two NBI-derived peer sets for Baltimore city County, both outside Maryland so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside MD (374 bridges here).

Similar average build year

Nearest mean year-built outside MD (1964 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 374 Good 60 Fair 282 Poor 32

Good-condition bridges (60)

ODONNELL STREET

Good

Over: NORFOLK SOUTHERN RR CAN

0.5 MI W OF I-895, Baltimore city, MD

Built 1999 Load: 25.4 t ADT: 25,970

IS 95 VIADUCT SB

Good

Over: S PONCA STREET

Milepost M57.0, Baltimore city, MD

Built 1980 Load: 27.2 t ADT: 72,095

IS 95 VIADUCT NB

Good

Over: BOSTON ST ODONNELL S

1.6 MI N OF TOLL FACILITY, Baltimore city, MD

Built 1980 Load: 27.2 t ADT: 57,722

FRANKLINTOWN ROAD

Good

Over: DEAD RUN

0.8 MI W HILTON PKWY, Baltimore city, MD

Built 2004 Load: 32.2 t ADT: 1,219

US 40 EDMONDSON AV

Good

Over: GWYNNS FALLS CSX

0.2 MI E HILTON PKWY, Baltimore city, MD

Built 1907 Load: 32.7 t ADT: 3,900

NORTHERN PARKWAY

Good

Over: POWDER MILL RUN

NORTHERN PKWY/POWDER MILL, Baltimore city, MD

Built 1965 Load: 32.7 t ADT: 31,395

PULASKI HIGHWAY

Good

Over: MOORES RUN

PULASKI HY OV MOORES RUN, Baltimore city, MD

Built 1971 Load: 32.7 t ADT: 52,411

LANCASTER ST. AT C

Good

Over: HARFORD RUN

LANCASTER ST AT CENTRAL A, Baltimore city, MD

Built 1985 Load: 32.7 t ADT: 5,650

WASHINGTON BOULEVA

Good

Over: CSX

0.7MI NE OF PATAPSCO AVE, Baltimore city, MD

Built 1979 Load: 32.7 t ADT: 20,691

SPOOKS HILL ROAD

Good

Over: COOPERS RUN

0.8 MI E BECKLEYSVILLE RD, Baltimore city, MD

Built 2016 Load: 33.0 t ADT: 110

IS 95 SB

Good

Over: BOSTON ST ODONNELL S

AT EXIT 57, Baltimore city, MD

Built 1980 Load: 33.1 t ADT: 64,724

FREDERICK AVE

Good

Over: GWYNNS FALLS CSX

0.6 MI E HILTON PKWY, Baltimore city, MD

Built 1930 Load: 33.6 t ADT: 18,410

MONROE STREET VIAD

Good

Over: CSX RAILROAD

0.1 MI NW OF I-95, Baltimore city, MD

Built 1955 Load: 33.6 t ADT: 12,000

I-895 NB

Good

Over: MOORES RUN

Milepoint M14.68, Baltimore city, MD

Built 2008 Load: 34.9 t ADT: 32,084

ANNAPOLIS ROAD

Good

Over: MD 295 B/W PARKWAY

0.3 MI N OF PATAPSCO AVE, Baltimore city, MD

Built 2022 Load: 35.6 t ADT: 16,650

SOUTH CENTRAL AVEN

Good

Over: PATAPSCO RIVER

BETWEEN LANCASTER & DOCK, Baltimore city, MD

Built 2019 Load: 35.6 t ADT: 3,081

POTEE STREET

Good

Over: PATAPSCO RIVER

0.7 MI S HANOVER ST, Baltimore city, MD

Built 2005 Load: 35.8 t ADT: 16,254

IS 95 RAMP L

Good

Over: RAMP L TO ODONNELL ST

MILEPOST 57.5, Baltimore city, MD

Built 1984 Load: 35.8 t ADT: 12,092

CLIFTON AVENUE

Good

Over: WINDSOR MILL ROAD

0.6 MI E OF HILTON ST, Baltimore city, MD

Built 2000 Load: 36.7 t ADT: 25,000

IS 95

Good

Over: WASH. BLVD & GWYNNS FALL

I95 AT WASH BLVD, Baltimore city, MD

Built 1977 Load: 36.7 t ADT: 111,945

SINCLAIR LANE

Good

Over: CSX

0.3 MI W OF ERDMAN AVE, Baltimore city, MD

Built 2014 Load: 38.5 t ADT: 18,733

I-695 OL

Good

Over: CSXT RR

0.18 MI N OF CHEMICAL RD, Baltimore city, MD

Built 1975 Load: 38.5 t ADT: 23,169

IS 95 RAMP Q

Good

Over: FROM INTERSTATE AVE

0.1 MI. S. OF BOSTON ST., Baltimore city, MD

Built 1980 Load: 39.0 t ADT: 7,352

I-895 TOLL LANES

Good

Over: I-95 SOUTHBOUND MOORES

ETLs at I-895 and I-95, Baltimore city, MD

Built 2011 Load: 39.0 t ADT: 72,287

IS 895

Good

Over: CITY STREETS B&O PA RR

Milepost 10.62, Baltimore city, MD

Built 2020 Load: 39.5 t ADT: 82,953

I-695 OL

Good

Over: DOCK ROAD

0.2 MI S OF FSK BR W ABUT, Baltimore city, MD

Built 1972 Load: 39.9 t ADT: 19,157

I-895 NB

Good

Over: HERRING RUN

Milepost M13.72, Baltimore city, MD

Built 1957 Load: 40.8 t ADT: 35,344

COLDSPRING LANE

Good

Over: MTA AND JONES FALLS

1.5 MI S NORTHERN PKWY, Baltimore city, MD

Built 1990 Load: 41.3 t ADT: 12,100

Harford Road

Good

Over: Herring Run Trail

0.4 MI S ARGONNE DRIVE, Baltimore city, MD

Built 2022 Load: 42.1 t ADT: 20,994

MOUNT STREET

Good

Over: AMTRAK RAILROAD

0.1 MI E OF MONROE ST, Baltimore city, MD

Built 1997 Load: 42.2 t ADT: 3,077

I-895 SB

Good

Over: HERRING RUN

MILEPOST M13.7, Baltimore city, MD

Built 1957 Load: 42.2 t ADT: 35,344

HARFORD ROAD

Good

Over: HERRING RUN

0.25 MI S ARGONNE DRIVE, Baltimore city, MD

Built 1911 Load: 43.1 t ADT: 20,994

HAMBURG STREET

Good

Over: MTA LIGHT RAIL MARC &

0.8 MI. N. OF I 95, Baltimore city, MD

Built 1991 Load: 43.5 t ADT: 6,332

IS 95 VIADUCT SB

Good

Over: CONRAIL YARDS

Milepost M56.7, Baltimore city, MD

Built 1982 Load: 44.0 t ADT: 68,369

I-395 RAMP E

Good

Over: MIDDLE BRANCH

Milepost 0.2, Baltimore city, MD

Built 1979 Load: 44.4 t ADT: 15,641

GUNPOWDER ROAD

Good

Over: GRAVES RUN

0.8 MI N BECKLEYSVILLE RD, Baltimore city, MD

Built 1990 Load: 44.9 t ADT: 153

GEORGES CREEK ROAD

Good

Over: GEORGES RUN

1.3 MI E FALLS RD, Baltimore city, MD

Built 2011 Load: 45.7 t ADT: 180

WEST OSTEND STREET

Good

Over: MARC CSX

0.15 MI. NW. OF WASH. BLV, Baltimore city, MD

Built 1993 Load: 46.3 t ADT: 8,239

MORAVIA ROAD

Good

Over: I-895

Milepost M13.96, Baltimore city, MD

Built 2008 Load: 46.3 t ADT: 26,230

MONROE ST RAMP EB

Good

Over: SERVICE ROAD

1.0 MI S OF RTE 1, Baltimore city, MD

Built 2006 Load: 47.2 t ADT: 15,441

MORAVIA PARK DRIVE

Good

Over: I-895

I-895 Milepost M14.25, Baltimore city, MD

Built 2008 Load: 48.1 t ADT: 13,902

RUSSELL ST. SB RAM

Good

Over: WALKWAY

UNDER IS 95, Baltimore city, MD

Built 2006 Load: 48.5 t ADT: 13,500

I-895 OFF RAMP

Good

Over: PONCA ST

Milepost M11.1, Baltimore city, MD

Built 2020 Load: 48.6 t ADT: 3,033

NEW VAIL ST

Good

Over: Canton RR

0.0 MI. S of Keith Ave, Baltimore city, MD

Built 1990 Load: 49.4 t ADT: 1,183

SB I-83 OFF-RAMP t

Good

Over: MTA LIGHT RAIL

OFFRAMP SB JFX @ CLDSPRNG, Baltimore city, MD

Built 1962 Load: 50.8 t ADT: 5,149

I-83SB OFF-RAMP

Good

Over: MTA LIGHT RAIL

I-83 AT NORTHERN PKWY, Baltimore city, MD

Built 1962 Load: 50.8 t ADT: 23,357

I-895 RAMP B

Good

Over: LOMBARD STREET

Milepost M12.51, Baltimore city, MD

Built 1994 Load: 50.8 t ADT: 66,347

ARGONNE DRIVE

Good

Over: HERRING RUN

0.2 MI W HARFORD RD, Baltimore city, MD

Built 1958 Load: 51.2 t ADT: 12,687

I-895 SB

Good

Over: MOORES RUN

I-895 SB Milepost 14.54, Baltimore city, MD

Built 2009 Load: 54.0 t ADT: 78,180

WATERVIEW AVE

Good

Over: MD 295 BW PARKWAY

0.6 MI S OF I-95, Baltimore city, MD

Built 2023 Load: 54.1 t ADT: 19,170

Read our methodology - how this data is sourced, computed, and verified.

Related

Browse all → | Rankings →
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.