County profile · official public datasets

Bronx County, NY

311 public highway bridges tracked in the FHWA National Bridge Inventory: 16.1% rated Good, 75.6% Fair, 8.4% Poor.

311
Public bridges: 16.1%
Good condition: 8.4%
Poor condition

The verdict

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

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

Top 40%
lowest Poor share in state: 8.4%
Poor-condition share: 311
public highway bridges: 1945
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.

Bronx County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Bronx County ranks #25 of 62 New York counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 8.4%). Bronx County, New York contains 311 public highway bridges. Roughly 16.1% are rated “Good,” 75.6% “Fair,” and 8.4% “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

311

Public highway bridges in Bronx County

Good condition

16.1%

50 of 311 rated 7-9

Fair condition

75.6%

235 of 311 rated 5-6

Poor condition

8.4%

26 of 311 rated 4 or below

In-state Poor-share rank

#25 of 62

Among New York counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 311 NBI-tracked bridges by lowest applicable component rating.

Good

16.1% (50)

Fair

75.6% (235)

Poor

8.4% (26)

Bronx County's Poor-condition bridges carry 941,002 vehicle crossings a day

That is 10.6% of the county's reported daily bridge traffic on 8.3% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 42,773 crossings a day against 28,324 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 266 of 311 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

91.3% of Bronx County's bridges have passed the 50-year mark

284 of the 311 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 16.1% 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 15.2% of the county's Poor-condition bridge traffic

RTE I278 over BRUCKNER EXPWY BRUCKNER, built 1960, carries 143,338 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 26-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 941,002 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

pre-1900

20
1900s

37
1910s

14
1920s

22
1930s

23
1940s

18
1950s

75
1960s

60
1970s

20
1980s

1
1990s

1
2000s

5
2010s

7
2020s

8

What this shows Construction peaked in the 1950s, when 75 of the county's bridges still in the inventory were built, which is 24.1% of those with a recorded year. That cohort is now 65 to 74 years old in the 2024 inventory. Its average build year is 1945, 27 years older than the New York average of 1972.

How Bronx County compares with New York's closest counties by inventory size

The 5 New York counties nearest Bronx County in number of bridges, with their condition splits. Its 8.4% Poor share is the 4th-lowest of these 6. Its average build year of 1945 against a peer-group mean of 1970 is 25 years older.

Showing the 5 closest of 61 New York counties eligible for comparison.

Bridge inventory size and condition shares for Bronx County and the 5 New York counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Albany County	343	29.7%	65%	5.2%	1975
Dutchess County	332	22.6%	60.8%	16.6%	1967
Nassau County	328	28.4%	70.4%	1.2%	1959
Jefferson County	316	41.5%	47.8%	10.8%	1971
St. Lawrence County	312	59.9%	33.3%	6.7%	1976
Bronx County (this page)	311	16.1%	75.6%	8.4%	1945

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 Bronx 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 Bronx County, both outside New York so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside NY (311 bridges here).

Boulder County, CO · 311 bridges
Madison County, MS · 311 bridges
Huron County, OH · 311 bridges
Saline County, NE · 312 bridges

Similar average build year

Nearest mean year-built outside NY (1945 here).

Presidio County, TX · avg 1946 · 75 bridges
Irion County, TX · avg 1944 · 50 bridges
Upton County, TX · avg 1947 · 39 bridges
Crane County, TX · avg 1943 · 19 bridges

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

All 311 Good 50 Fair 235 Poor 26

All bridges (311)

Sort:

Bronx County Bridge Snapshot

Condition distribution

Bronx County's Poor-condition bridges carry 941,002 vehicle crossings a day

91.3% of Bronx County's bridges have passed the 50-year mark

One structure carries 15.2% of the county's Poor-condition bridge traffic

How Bronx County compares with New York's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

All bridges (311)

RTE I87

ST MARYS STREET

WEST 230TH STREET

RTE 908A

RTE I87

RTE I95

RTE I95

RTE I278

RTE I278

BE SERVICE RD SB

I95 SERVICE RD EB

EAST 174 TH ST

Ramp to NB 87I

BARRETTO STREET

RANDALL AVENUE

JESUP AVENUE

RTE I278

RTE I95

RTE I678

RTE I87

181st ST to95I NB

RTE I87

WALTON AVENUE

LAYTON AVENUE

WESTCHESTER AVE

UNDERCLIFF AVE

181ST STREET

WEST 233RD STREET

LOGAN AVENUE

RTE I95

EAST 165TH ST

I-95 EXIT 10 RAMP

GRAND CONCOURSE

RTE I278

RTE I87

EAST TREMONT AVE

EAST TREMONT AVE

RTE I87

LAFAYETTE AVENUE

WESTCHESTER AVE

NELSON AVENUE

RTE I87

WHITE PLAINS ROAD

CASTLE HILL AVE

RTE I87

RTE I87

RTE I87

BEDFORD PARK BLVD

UNDERCLIFF AVENUE

RTE I87

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