Total bridges
774
Public highway bridges in Westchester County
County profile · official public datasets
Westchester County, NY
774 public highway bridges tracked in the FHWA National Bridge Inventory: 23.3% rated Good, 67.2% Fair, 9.6% Poor.
- 774
- Public bridges
- 23.3%
- Good condition
- 9.6%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Westchester 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 48%
- lowest Poor share in state
- 9.6%
- Poor-condition share
- 774
- public highway bridges
- 1961
- 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.
Westchester County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Westchester County ranks #30 of 62 New York counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 9.6%). Westchester County, New York contains 774 public highway bridges. Roughly 23.3% are rated “Good,” 67.2% “Fair,” and 9.6% “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.
Good condition
23.3%
180 of 774 rated 7-9
Fair condition
67.2%
520 of 774 rated 5-6
Poor condition
9.6%
74 of 774 rated 4 or below
In-state Poor-share rank
#30 of 62
Among New York counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 774 NBI-tracked bridges by lowest applicable component rating.
Good 23.3% (180)
Fair 67.2% (520)
Poor 9.6% (74)
Westchester County's Poor-condition bridges carry 1,194,913 vehicle crossings a day
That is 7.7% of the county's reported daily bridge traffic on 9.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 17,572 crossings a day against 24,180 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 704 of 774 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
70.5% of Westchester County's bridges have passed the 50-year mark
546 of the 774 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 23.3% 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 12% of the county's Poor-condition bridge traffic
RTE 907K over 907G X MC QUESTEN AVENU, built 1983, carries 143,278 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 74-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 1,194,913 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Westchester County's bridges were built
774 bridges with a recorded construction year, grouped by decade
- pre-1900 18
Built before 1900
18 bridges
- 1900s 17
1900–1909
17 bridges
- 1910s 26
1910–1919
26 bridges
- 1920s
1920–1929
72 bridges
- 1930s
1930–1939
96 bridges
- 1940s 14
1940–1949
14 bridges
- 1950s
1950–1959
115 bridges
- 1960s
1960–1969
124 bridges
- 1970s
1970–1979
74 bridges
- 1980s 49
1980–1989
49 bridges
- 1990s
1990–1999
59 bridges
- 2000s
2000–2009
58 bridges
- 2010s 37
2010–2019
37 bridges
- 2020s 15
2020–2029
15 bridges
What this shows Construction peaked in the 1960s, when 124 of the county's bridges still in the inventory were built, which is 16% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1961, 11 years older than the New York average of 1972.
How Westchester County compares with New York's closest counties by inventory size
The 5 New York counties nearest Westchester County in number of bridges, with their condition splits. Its 9.6% Poor share is the 4th-lowest of these 6. Its average build year of 1961 against a peer-group mean of 1975 is 14 years older.
Showing the 5 closest of 61 New York counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Erie County | 906 | 37.9% | 53.4% | 8.7% | 1973 |
| Westchester County (this page) | 774 | 23.3% | 67.2% | 9.6% | 1961 |
| Steuben County | 627 | 41.5% | 54.4% | 4.1% | 1984 |
| Monroe County | 615 | 36.4% | 52.7% | 10.9% | 1975 |
| Chautauqua County | 559 | 44% | 46.3% | 9.7% | 1977 |
| Queens County | 514 | 30.4% | 62.3% | 7.4% | 1966 |
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 Westchester 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 Westchester County, both outside New York so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside NY (774 bridges here).
- Fulton County, GA · 775 bridges
- Johnson County, KS · 781 bridges
- Baltimore County, MD · 783 bridges
- Hamilton County, OH · 783 bridges
Similar average build year
Nearest mean year-built outside NY (1961 here).
- Tehama County, CA · avg 1961 · 450 bridges
- Berkshire County, MA · avg 1961 · 450 bridges
- Schuylkill County, PA · avg 1961 · 368 bridges
- Columbiana County, OH · avg 1961 · 321 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (520)
COUNTY ROAD 127
FairOver: 87IX RTE I87
2 MI S JCT I87 & CC PRKWY, Westchester, NY
Built 2002 Load: 81.3 t
RTE 100
FairOver: 287 RAMP MANHATTEN PARK
1 MI E JCT SH119 & SH100A, Westchester, NY
Built 1958 Load: 81.6 t ADT: 48,794
FENIMORE ROAD
FairOver: WINDING BROOK
1.4 MI NW OF MAMARONECK, Westchester, NY
Built 1920 Load: 81.6 t ADT: 6,296
RTE 35
FairOver: AMAWALK DAM SPILL
5 MI EA JCTS TSP & RT 35, Westchester, NY
Built 1997 Load: 82.6 t ADT: 11,355
HALSTEAD AVENUE
FairOver: MAMARONECK RIVER
AT MAMARONECK, Westchester, NY
Built 1910 Load: 84.4 t ADT: 7,311
THEODORE FREMD AVE
FairOver: BLIND BROOK
2.9 MI NE MAMARONECK RYE, Westchester, NY
Built 1928 Load: 87.1 t ADT: 7,222
WHITE PLAINS AVE
FairOver: MAMARONECK RIVER
3.7 MI SE OF ELMSFORD, Westchester, NY
Built 1957 Load: 88.0 t ADT: 9,713
PONDFIELD ROAD W.
FairOver: BRONX RIVER
1.1 MI SW OF TUCKAHOE, Westchester, NY
Built 1911 Load: 88.9 t ADT: 5,028
RTE 987D
FairOver: SAW MILL RIVER
4.1 MI NE OF TARRYTOWN, Westchester, NY
Built 1972 Load: 88.9 t ADT: 10,639
RTE 9A
FairOver: SAW MILL RIVER
JCT RTS 9A + 100 + 41, Westchester, NY
Built 1972 Load: 99.9 t ADT: 18,166
RAMP TO I287
FairOver: MANHATTEN BROOK
EXIT 5-I287 TO SH 100, Westchester, NY
Built 1960 Load: 99.9 t ADT: 16,150
RTE 119
FairOver: MAMARONECK RIVER
JCT I287 WB RAMP & RTE119, Westchester, NY
Built 1961 Load: 99.9 t
RTE I287
FairOver: BLIND BROOK
1.9 MI E JCT RTE I287+HRP, Westchester, NY
Built 1960 Load: 99.9 t ADT: 79,177
RTE 100
FairOver: POCANTICO RIVER
.5 MI S JCT SH 100 & TSP, Westchester, NY
Built 1967 Load: 99.9 t ADT: 6,307
RTE I684
FairOver: BROAD BROOK
1.7 MI N RTE I684 INT 4, Westchester, NY
Built 1968 Load: 99.9 t ADT: 29,529
ROCKLAND AVENUE
FairOver: SHELDRAKE RIVER
AT MAMARONECK, Westchester, NY
Built 1955 Load: 99.9 t ADT: 4,041
WINTERBOTTOM LANE
FairOver: MILL RIVER
8.0 MI E OF MT KISCO, Westchester, NY
Built 1975 Load: 99.9 t ADT: 111
WESTCHESTER AV WB
FairOver: MAMARONECK RIVER
4.3 MI NW OF PORT CHESTER, Westchester, NY
Built 1955 Load: 99.9 t
907G NB-907K RAMP
FairOver: BRONX RIVER
2.2 MI NW OF PELHAM, Westchester, NY
Built 1970 Load: 99.9 t
RTE 987G
FairOver: SAW MILL RIVER
4.1 MI NE OF TARRYTOWN, Westchester, NY
Built 1972 Load: 99.9 t ADT: 94,345
Read our methodology - how this data is sourced, computed, and verified.
Related
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.