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

All bridges (374)

LOCH RAVEN DRIVE

Fair

Over: MINEBANK RUN

0.09 MI W CROMWELL BRDG R, Baltimore city, MD

Built 1900 Load: 13.6 t ADT: 309

STRATHMORE AVENUE

Fair

Over: WESTERN RUN

0.1 MI N CROSS COUNTRY BL, Baltimore city, MD

Built 1955 Load: 20.0 t ADT: 15,199

OVERHILL ROAD

Fair

Over: STONY RUN

OVERHILL RD OV STONY RUN, Baltimore city, MD

Built 1930 Load: 20.0 t ADT: 11,921

IS 95 NB

Fair

Over: US 40(PULASKI HWY)

0.2 MI NORTH OF EXIT 61, Baltimore city, MD

Built 1973 Load: 20.4 t ADT: 56,885

IS 95 RAMP E

Fair

Over: I95 NB I95 SB CSX

IS 95 NB EXIT 60, Baltimore city, MD

Built 1974 Load: 20.9 t ADT: 6,819

IS 95 SB VIADUCT

Fair

Over: ROADS RRS HERRING RUN

MILEPOST 59.6, Baltimore city, MD

Built 1974 Load: 22.2 t ADT: 67,634

I-895

Fair

Over: CSXT RR

Milepost M7.65, Baltimore city, MD

Built 1957 Load: 22.7 t ADT: 72,510

GUILFORD AVENUE

Fair

Over: I-83 AND AMTRAK RAILROAD

0.08 MI S OF CALVERT ST, Baltimore city, MD

Built 1930 Load: 24.0 t ADT: 12,191

HOWARD STREET

Fair

Over: I-83 CSX MTA AMTRAK

0.2 MI N MOUNT ROYAL AVE, Baltimore city, MD

Built 1938 Load: 24.9 t ADT: 27,982

I-83 SB

Fair

Over: GAY STREET

0.2 MI S OF ORLEANS ST, Baltimore city, MD

Built 1975 Load: 25.4 t ADT: 80,130

IS 95 VIADUCT NB

Fair

Over: S PONCA ST I 895

Milepost M57.0, Baltimore city, MD

Built 1980 Load: 25.4 t ADT: 64,313

I-395 SPUR SB

Fair

Over: HAMBURG ST & RR

Milepost M4.0, Baltimore city, MD

Built 1982 Load: 25.8 t ADT: 19,418

MD 695

Fair

Over: PATAPSCO RIVER

I-695 OVER PATAPSCO RIVER, Baltimore city, MD

Built 1976 Load: 25.9 t ADT: 30,767

IS 95 NB

Fair

Over: RACE ST HANOVER ST

Milepost M55.1, Baltimore city, MD

Built 1979 Load: 27.2 t ADT: 66,316

ARGYLE AVENUE

Fair

Over: AMTRAK RAILROAD

0.5 M E OF FULTON AV, Baltimore city, MD

Built 1900 Load: 27.7 t ADT: 3,598

I-395 SB SPUR

Fair

Over: RUSSELL STREET

Milepost M3.6, Baltimore city, MD

Built 1980 Load: 27.7 t ADT: 17,162

BENTALOU ST

Fair

Over: CSXT RAILROAD

BENTALOU ST OVER CSX, Baltimore city, MD

Built 1965 Load: 28.1 t ADT: 5,600

I-83

Fair

Over: JONES FALLS & UNION AVE

I-83 OVER JF & UNION AVE, Baltimore city, MD

Built 1959 Load: 28.1 t ADT: 95,051

COLDSPRING RAMP TO

Fair

Over: MTA LIGHT RAIL

ON RAMP SB JFX I-83, Baltimore city, MD

Built 1962 Load: 28.6 t ADT: 23,800

I-83 NB

Fair

Over: GAY STREET

0.2 MI S OF ORLEANS ST, Baltimore city, MD

Built 1975 Load: 29.0 t ADT: 79,335

I-83 NORTHBOUND

Fair

Over: PUMPING STATION

0.5 MI N OF NORTH AVENUE, Baltimore city, MD

Built 1959 Load: 29.0 t ADT: 63,086

I-83

Fair

Over: MTA AND JONES FALLS

1.1 MI S OF COLD SPRING L, Baltimore city, MD

Built 1959 Load: 29.0 t ADT: 120,795

COLD SPRING LANE

Fair

Over: HERRING RUN

0.2 MI E OF HILLEN RD, Baltimore city, MD

Built 1929 Load: 29.0 t ADT: 16,151

I-395 RAMP F

Fair

Over: MIDDLE BR RAMP G&H I95

0.8 MI. S. OF CONWAY ST., Baltimore city, MD

Built 1979 Load: 29.0 t ADT: 15,362

I-695 IL

Fair

Over: CSXT RR

0.44 MI S OF DOCK ROAD, Baltimore city, MD

Built 1978 Load: 29.0 t ADT: 17,979

I-695 OL

Fair

Over: CSXT RR

0.44 MI S OF DOCK ROAD, Baltimore city, MD

Built 1975 Load: 29.0 t ADT: 19,157

I-83

Fair

Over: JONES FALLS

0.3 MI N COLD SPRING LANE, Baltimore city, MD

Built 1962 Load: 30.8 t ADT: 23,800

RUSSELL STREET

Fair

Over: MONROE STREET

RUSSELL ST VIA OV MONROE, Baltimore city, MD

Built 2007 Load: 30.8 t ADT: 13,000

PENNINGTON AVENUE

Fair

Over: CURTIS CREEK

2 MI S PATAPSCO AVE, Baltimore city, MD

Built 1976 Load: 31.3 t ADT: 13,500

IS 95 RAMP D

Fair

Over: GWYNN FALLS MIDDLE BR

0.3 MI E RUSSELL ST, Baltimore city, MD

Built 1977 Load: 31.3 t ADT: 15,504

IS 95 SB

Fair

Over: US 40(PULASKI HWY)

1.0 MI. SOUTH OF EXIT 62, Baltimore city, MD

Built 1973 Load: 31.3 t ADT: 62,158

IS 695 IL

Fair

Over: CURTIS CR B&O RR

0.36 MI N OF AA CO LINE, Baltimore city, MD

Built 1975 Load: 31.7 t ADT: 21,765

I-170 WB RAMP

Fair

Over: ACCESS ROAD

I-170 WB RAMP OVER ACCESS, Baltimore city, MD

Built 1979 Load: 32.7 t ADT: 23,650

I-170 EB RAMP

Fair

Over: ACCESS ROAD

I-170 EB RAMP OVER ACCESS, Baltimore city, MD

Built 1979 Load: 32.7 t ADT: 1,305

US 1 MONROE STREE

Fair

Over: AMTRAK

0.5 MI S OF NORTH AVE, Baltimore city, MD

Built 1900 Load: 32.7 t ADT: 9,999

LOMBARD STREET

Fair

Over: JONES FALLS

0.1 MI N OF PRATT ST, Baltimore city, MD

Built 1974 Load: 32.7 t ADT: 38,036

NORTH AVENUE

Fair

Over: JONES FALLS FALLS RD RR

NORTH AVE OVER CSX, Baltimore city, MD

Built 1895 Load: 32.7 t ADT: 20,361

CHASE STREET

Fair

Over: I-83 ABANDONED RR

0.03 MI S OF FALLSWAY, Baltimore city, MD

Built 1968 Load: 32.7 t ADT: 12,750

MOUNT ROYAL AVENUE

Fair

Over: HOWARD STREET

0.1 MI N OF JOHN ST, Baltimore city, MD

Built 1938 Load: 32.7 t ADT: 20,716

MOUNT STREET

Fair

Over: I-170

0.1 MI N OF SARATOGA ST, Baltimore city, MD

Built 1976 Load: 32.7 t ADT: 3,243

HILTON PARKWAY

Fair

Over: GELSTON RUN

0.4 MI N EDMONDSON AVE, Baltimore city, MD

Built 1938 Load: 32.7 t ADT: 9,040

LIBERTY HEIGHTS AV

Fair

Over: POWDER MILL RUN

0.1 MI W POWDER MILL LN, Baltimore city, MD

Built 1966 Load: 32.7 t ADT: 28,441

BALTIMORE STREET

Fair

Over: GWYNNS FALLS CSX

0.2 MI E HILTON PKWY, Baltimore city, MD

Built 1931 Load: 32.7 t ADT: 9,375

BANCROFT ROAD

Fair

Over: WESTERN RUN

0.1 MI N CROSS COUNTRY B, Baltimore city, MD

Built 1950 Load: 32.7 t ADT: 39,339

I-83

Fair

Over: JONES FALLS (MI. 7.1 TO

0.6 MI S COLD SPRING LN, Baltimore city, MD

Built 1959 Load: 32.7 t ADT: 105,600

29TH STREET

Fair

Over: I 83 JONES FALLS CSX

0.8 MI N NORTH AVE, Baltimore city, MD

Built 1938 Load: 32.7 t ADT: 5,688

UNIVERSITY PARKWAY

Fair

Over: STONY RUN

0.6 MI W CHARLES STREET, Baltimore city, MD

Built 1908 Load: 32.7 t ADT: 6,340

GREELY ROAD

Fair

Over: WESTERN RUN

0.4 MI N KELLY AVE & I 83, Baltimore city, MD

Built 1983 Load: 32.7 t ADT: 10,900

BONNIEVIEW DRIVE

Fair

Over: WESTERN RUN

BONNIEVIEW DR @ WSTRN RUN, Baltimore city, MD

Built 1950 Load: 32.7 t ADT: 749

HILLEN ROAD

Fair

Over: CHINQUAPIN RUN

0.2 MI N OF COLDSPRING LA, Baltimore city, MD

Built 1900 Load: 32.7 t ADT: 11,996

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.