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

Fair-condition bridges (282)

IS 95 NB

Fair

Over: WB MCCOMAS ST

0.2 MI. N. OF EXIT 54, Baltimore city, MD

Built 1982 Load: 43.5 t ADT: 58,406

BRAND AVE

Fair

Over: JONES FALLS

0.03 MI N COLD SPRING LA, Baltimore city, MD

Built 1973 Load: 44.0 t ADT: 140

IS 95 RAMP D

Fair

Over: MIDDLE BR LIGHT RAIL

0.6 MI E RUSSELL ST, Baltimore city, MD

Built 1979 Load: 44.0 t ADT: 15,504

IS 95 NB

Fair

Over: MTA LIGHT RAIL AND STORA

MTA LGTRail&Storage Yard, Baltimore city, MD

Built 1977 Load: 44.4 t ADT: 49,255

IS 95 SB

Fair

Over: MIDDLE BRANCH

0.6 MI. E. OF RUSSELL ST., Baltimore city, MD

Built 1979 Load: 44.4 t ADT: 68,141

I-83 NB

Fair

Over: CENTRE STREET

0.1 MI N OF ORLEANS ST, Baltimore city, MD

Built 1976 Load: 44.9 t ADT: 71,820

TRACEYS STORE ROA

Fair

Over: PRETTYBOY BRANCH

1.7 MI NE OF FORESTON RD, Baltimore city, MD

Built 1932 Load: 44.9 t ADT: 110

IS 95 NB

Fair

Over: KEY HIGHWAY

0.4 MI. N. OF EXIT 55, Baltimore city, MD

Built 1982 Load: 44.9 t ADT: 58,406

IS 95 SB

Fair

Over: KEY HWY WB MCCOMAS ST

I-95 SB MILEPOST 55.8, Baltimore city, MD

Built 1982 Load: 44.9 t ADT: 65,378

IS 95 SB

Fair

Over: B & O RR

0.25 MI S OF PULASKI HWY, Baltimore city, MD

Built 1972 Load: 44.9 t ADT: 68,217

IS 95 NB

Fair

Over: B&O RR

Milepost M52.0, Baltimore city, MD

Built 1982 Load: 45.4 t ADT: 91,311

MONROE STREET

Fair

Over: B&O MUSEUM RR

MONROE ST & MT CLARE MANS, Baltimore city, MD

Built 1993 Load: 45.8 t ADT: 17,281

IS 95 SB

Fair

Over: MTA LIGHT RAIL AND STORA

I-95 / I-395 INTERCHANGE, Baltimore city, MD

Built 1977 Load: 45.8 t ADT: 89,029

WASHINGTON BOULEVA

Fair

Over: GWYNNS FALLS

0.5 MI W MONROE ST, Baltimore city, MD

Built 1975 Load: 46.3 t ADT: 16,525

JOH AVENUE

Fair

Over: IS 95

0.41 MI S OF CATON AVE, Baltimore city, MD

Built 1971 Load: 46.3 t ADT: 1,381

I-895

Fair

Over: LOMBARD STREET

Milepost M12.51, Baltimore city, MD

Built 1957 Load: 46.3 t ADT: 6,293

FULTON AVENUE

Fair

Over: I-170

0.1 MI S OF FRANKLIN ST, Baltimore city, MD

Built 1975 Load: 46.7 t ADT: 6,501

I-83 NB

Fair

Over: MTA LIGHT RAIL YARD

STA. 150-158, Baltimore city, MD

Built 1959 Load: 46.7 t ADT: 117,171

IS 95 NB

Fair

Over: GUSRYAN ST

500 FT W OF DUNDALK AVE, Baltimore city, MD

Built 1976 Load: 46.7 t ADT: 69,003

PERRING PARKWAY

Fair

Over: HERRING RUN

0.2 MI N BELVEDERE AVE, Baltimore city, MD

Built 1965 Load: 47.2 t ADT: 78,745

COTTONWORTH AVENUE

Fair

Over: WESTERN RUN

0.03 MI W SMITH AVE-FALLS, Baltimore city, MD

Built 1970 Load: 47.2 t ADT: 600

PHOENIX ROAD

Fair

Over: GREENES BRANCH

0.03 MI N PAPER MILL RD, Baltimore city, MD

Built 1967 Load: 47.2 t ADT: 1,237

IS 95 NB RAMP T

Fair

Over: FROM KEITH AVE SPUR

Milepost M56.6, Baltimore city, MD

Built 1980 Load: 47.2 t ADT: 3,828

I-895

Fair

Over: CHILDS ST RR

Milepost M8.33, Baltimore city, MD

Built 1957 Load: 47.2 t ADT: 82,953

FOSTER AVENUE

Fair

Over: I-895

MILE POINT 12.5, Baltimore city, MD

Built 1957 Load: 47.2 t ADT: 757

I-83

Fair

Over: CSX MTA AMTRAK AND NOR

0.03 MI W OF NORTH AVE, Baltimore city, MD

Built 1959 Load: 47.6 t ADT: 127,291

PRATT STREET

Fair

Over: JONES FALLS

0.3 MI E GAY ST, Baltimore city, MD

Built 1988 Load: 47.6 t ADT: 39,933

IS 95 SB

Fair

Over: WB MCCOMAS ST

0.9 MI. S. OF TUNNEL, Baltimore city, MD

Built 1982 Load: 47.6 t ADT: 65,378

FAIT AVENUE

Fair

Over: I-895

MILE POINT 11.98, Baltimore city, MD

Built 1957 Load: 47.6 t ADT: 485

I-695 IL

Fair

Over: DOCK ROAD

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

Built 1979 Load: 47.6 t ADT: 17,979

SAN MARTIN DRIVE

Fair

Over: STONEY RUN

0.5 MI N HOWARD & 29TH ST, Baltimore city, MD

Built 1930 Load: 48.1 t ADT: 2,034

FALLSWAY

Fair

Over: I-83 & JAIL PARKING LOTS

0.03 MI S OF BIDDLE ST, Baltimore city, MD

Built 1968 Load: 48.5 t ADT: 8,404

IS 95 NB

Fair

Over: B & O RR

0.25 MI S OF PULASKI HWY, Baltimore city, MD

Built 1972 Load: 48.5 t ADT: 64,059

HILTON STREET

Fair

Over: AMTRAK

AT FREDERICK AVE JCT, Baltimore city, MD

Built 1955 Load: 49.0 t ADT: 29,811

I-95 NB COLLECTOR

Fair

Over: DESOTO ROAD

Milepost M52.4, Baltimore city, MD

Built 1976 Load: 49.0 t ADT: 11,209

I-95 RAMP P

Fair

Over: VACANT LOT / WETLANDS

Milepost M56.4, Baltimore city, MD

Built 1977 Load: 49.0 t ADT: 5,273

I-895

Fair

Over: FRANKFURST AVE

Milepost M7.9, Baltimore city, MD

Built 1957 Load: 49.4 t ADT: 74,587

MANNASOTA AVENUE

Fair

Over: HERRING RUN

0.6 MI W ERDMAN AVE, Baltimore city, MD

Built 1928 Load: 49.9 t ADT: 2,933

IS 95 RAMP B

Fair

Over: WB MCCOMAS ST

0.15 MI N OF HANOVER ST, Baltimore city, MD

Built 1982 Load: 49.9 t ADT: 7,909

MORAVIA ROAD RAMP

Fair

Over: HERRING RUN

MORAVIA RAMP TO PULASKI H, Baltimore city, MD

Built 1970 Load: 50.3 t ADT: 8,480

IS 95 RAMP A

Fair

Over: CSX LOCUST POINT YARD

0.5 mi N OF EXIT FOR I395, Baltimore city, MD

Built 1978 Load: 50.3 t ADT: 8,391

MAPLETON AVE

Fair

Over: I-895

Milepost M13.25, Baltimore city, MD

Built 1957 Load: 50.3 t ADT: 2,883

NORTHERN PARKWAY

Fair

Over: HERRING RUN PERRING PKW

0.4 MI E LOCH RAVEN BLVD, Baltimore city, MD

Built 1957 Load: 50.8 t ADT: 1,171

KEITH AVENUE VIADU

Fair

Over: NEWKIRK ST OLD KEITH AV

KEITH AVE OVER NEWKIRK ST, Baltimore city, MD

Built 1981 Load: 50.8 t ADT: 24,450

I-83 SB OFF-RAMP

Fair

Over: DRUID LAKE DR WESTBOUND

SB I-83 AT WB DRUID LK DR, Baltimore city, MD

Built 1959 Load: 51.2 t ADT: 26,030

DRUID PARK LAKE DR

Fair

Over: I-83 & NORFOLK RAILROAD

0.4 MI N OF NORTH AVE, Baltimore city, MD

Built 1962 Load: 51.2 t ADT: 21,400

KEITH AVENUE

Fair

Over: BROENING HIGHWAY

KEITH AVE OV BROENING HWY, Baltimore city, MD

Built 1973 Load: 51.2 t ADT: 1,849

IS 95 RAMP K

Fair

Over: CSX RACE ST McCOMAS ST

Milepost M55.3, Baltimore city, MD

Built 1979 Load: 51.2 t ADT: 10,039

SPOOKS HILL ROAD

Fair

Over: FROG HOLLOW RUN

1.3 MI W MIDDLETOWN RD, Baltimore city, MD

Built 2001 Load: 51.7 t ADT: 101

I-395 RAMP G

Fair

Over: MIDDLE BRANCH

Milepost M0.8, Baltimore city, MD

Built 1979 Load: 51.7 t ADT: 48,089

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.