New Haven County, CT

891 public highway bridges

New Haven County Bridge Snapshot

New Haven County, Connecticut contains 891 public highway bridges in the FHWA National Bridge Inventory. Roughly 25.7% are rated “Good,” 45.2% “Fair,” 2.6% “Poor,” and 2.6% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in CT are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

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

891
Total Bridges
25.7%
Good
2.6%
Poor
2.6%
Structurally Deficient

Condition Distribution

Good
25.7% (229)
Fair
45.2% (403)
Poor
2.6% (23)
SD
2.6% (23)

All Bridges (891)

DUTTON ROAD

Good

Over: LITTLE RIVER

100 FT SOUTH OF ROUTE 67, New Haven, CT

Built 2022 Load: 68.4 t ADT: 240

HUBBARD ROAD

Good

Over: WEST RIVER

0.2 MI W OF ROUTE 77, New Haven, CT

Built 2007 Load: 69.3 t ADT: 2,362

ROUTE 150

Good

Over: WHARTON BROOK

1.5 MI NE OF I-91, New Haven, CT

Built 2019 Load: 76.1 t ADT: 8,500

ROUTE 80

Good

Over: FARM RIVER

1.2 MI E OF ROUTE 100, New Haven, CT

Built 2020 Load: 79.7 t ADT: 12,100

INTERSTATE-84 & Pl

Good

Over: BEAVER POND BROOK

.1MI E OF HARPRS FERRY RD, New Haven, CT

Built 2018 Load: 83.9 t ADT: 92,200

ROUTE 69

Good

Over: MAD RIVER

0.5 MI S OF ROUTE 322, New Haven, CT

Built 2021 Load: 91.4 t ADT: 12,400

DERBY-MILFORD ROAD

Good

Over: WEPAWAUG RIVER

50 FT N OF ROUTE 121, New Haven, CT

Built 2019 Load: 92.0 t ADT: 7,200

KNOTTER DRIVE

Good

Over: JUDD BROOK

0.2 MI S OF I-691, New Haven, CT

Built 1971 Load: 92.3 t ADT: 3,638

HEATHERWOOD DRIVE

Good

Over: BROOK

0.2 MI E OF SUMMER HILL, New Haven, CT

Built 2022 Load: 97.2 t ADT: 399

BEACON VALLEY ROAD

Good

Over: BEACON HILL BROOK

0.3 MI S OF ROUTE 8, New Haven, CT

Built 1933 Load: 97.2 t ADT: 2,600

AUTUMN RIDGE ROAD

Good

Over: RIGGS STREET BROOK

330 FT E OF RIGGS STREET, New Haven, CT

Built 1994 Load: 97.2 t ADT: 39

INTERSTATE-95

Good

Over: FARM RIVER

0.3 MI N OF ROUTE 100, New Haven, CT

Built 1958 Load: 99.9 t ADT: 103,000

INTERSTATE-95

Good

Over: BRANFORD RIVER

0.6 MI S OF US ROUTE 1, New Haven, CT

Built 1958 Load: 99.9 t ADT: 70,500

ROUTE 15

Good

Over: WILMOT BROOK

1.0 MI S OF ROUTE 10, New Haven, CT

Built 1949 Load: 99.9 t ADT: 77,800

INTERSTATE-691

Good

Over: SODOM BROOK

0.4 MI E OF ROUTE 71, New Haven, CT

Built 1971 Load: 99.9 t ADT: 61,100

HARPERS FERRY ROAD

Good

Over: BEAVER POND BROOK

NORTH OF I-84 OVERPASS, New Haven, CT

Built 1952 Load: 99.9 t ADT: 12,900

SR 486 (AIRPORT RD

Good

Over: EIGHT MILE BROOK

100' EAST OF JCT RTE 188, New Haven, CT

Built 1975 Load: 99.9 t ADT: 3,000

PLANK ROAD EAST

Good

Over: BEAVER POND BROOK

175 FT W OF SCOTT ROAD, New Haven, CT

Built 2018 Load: 99.9 t ADT: 2,550

INTERSTATE-95

Poor

Over: METRO NORTH RAILROAD

0.23 MI NORTH OF FIRST AV, New Haven, CT

Built 1956 Load: 23.7 t ADT: 121,500

TOELLES ROAD

Poor

Over: QUINNIPIAC RIVER

100FT E OF ROUTE 15, New Haven, CT

Built 1982 Load: 25.3 t ADT: 8,703

NAUGATUCK AVENUE

Poor

Over: METRO NORTH RAILROAD

100' NORTH OF I-95, New Haven, CT

Built 1929 Load: 25.4 t ADT: 3,790

ROUTE 40 NB

Poor

Over: CSX RR, QUINNIPIAC RIVER

0.6 MI N OF 1-91 SB, New Haven, CT

Built 1972 Load: 29.9 t ADT: 20,500

CONNELLY PARKWAY

Poor

Over: MILL RIVER

0.2 MI E OF ROUTE 10, New Haven, CT

Built 1940 Load: 30.0 t ADT: 2,900

ROUTE 8 SOUTHBOUND

Poor

Over: RIVERSIDE ST-SUNNYSIDE

ROUTE 8 SOUTH OF I-84, New Haven, CT

Built 1966 Load: 31.7 t ADT: 16,900

QUINNIPIAC STREET

Poor

Over: WALLACE RACEWAY

0.2 MI E OF ROUTE 15, New Haven, CT

Built 1915 Load: 32.7 t ADT: 12,500

CENTER STREET

Poor

Over: HARBOR BROOK

250 FT NO OF PRATT STREET, New Haven, CT

Built 1871 Load: 32.7 t ADT: 6,186

ROUTE 146

Poor

Over: WEST RIVER

0.4 MI W OF ROUTE 77, New Haven, CT

Built 1910 Load: 33.7 t ADT: 5,500

ROUTE 15 NB

Poor

Over: QUINNIPIAC RIVER

1 MI NO OF JCT ROUTE 150, New Haven, CT

Built 1946 Load: 34.5 t ADT: 33,700

ROUTE 8 SOUTHBOUND

Poor

Over: NAUGATUCK RV-LOCAL ROADS

.27 MI NORTH OF TOWN LINE, New Haven, CT

Built 1966 Load: 36.6 t ADT: 27,600

HUMPHREY STREET

Poor

Over: MILL RIVER

0.1 MI E OF I-91, New Haven, CT

Built 1908 Load: 40.2 t ADT: 4,100

SR 745 KIMBERLY AV

Poor

Over: WEST RIVER

0.2 MI W OF I-95, New Haven, CT

Built 1969 Load: 41.1 t ADT: 16,000

ROUTE 337

Poor

Over: MORRIS CREEK

2.8 MI S. OF US ROUTE 1, New Haven, CT

Built 1936 Load: 41.4 t ADT: 2,600

ROUTE 40 SB

Poor

Over: AMTRAK RAILROAD

0.5 MILES N OF I-91, New Haven, CT

Built 1971 Load: 41.7 t ADT: 23,200

CLAPBOARD HILL RD

Poor

Over: EAST RIVER

.1 MI E OF EAST RIVER RD, New Haven, CT

Built 1950 Load: 42.8 t ADT: 3,000

EAGLE STREET

Poor

Over: NAUGATUCK RIVER

JCT OF EAGLE ST & SR 847, New Haven, CT

Built 1956 Load: 47.3 t ADT: 3,007

FORT PATH ROAD

Poor

Over: AMTRAK RAILROAD

0.3 MI SOUTH OF I-95, New Haven, CT

Built 1910 Load: 56.5 t ADT: 535

WAITE STREET

Structurally Deficient

Over: LAKE WHITNEY

0.2 MI EAST OF MATHER ST, New Haven, CT

Built 1935 Load: 21.4 t ADT: 2,000

WILLOW STREET

Structurally Deficient

Over: WILLOW BROOK

0.1 MI EAST OF ROUTE 10, New Haven, CT

Built 1924 Load: 22.7 t ADT: 488

SACKETT POINT ROAD

Structurally Deficient

Over: QUINNIPIAC RIVER

0.6 MI E OF US ROUTE 5, New Haven, CT

Built 1936 Load: 35.0 t ADT: 15,090

NORTHFORD ROAD

Structurally Deficient

Over: MUDDY RIVER

0.5 MI S OF I-91, New Haven, CT

Built 1938 Load: 55.1 t ADT: 2,861

ROUTE 162

Structurally Deficient

Over: TURTLE CREEK

0.7 MI E OF ROUTE 736, New Haven, CT

Built 1971 Load: 97.2 t ADT: 17,900

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

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial