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)

Sort:

ROUTE 17

Over: LITTLE RIVER

200 FT EAST OF I-91, New Haven, CT

Built 1965 Load: 46.0 t ADT: 23,100

ROUTE 8 NORTHBOUND

Over: WASHINGTON AVENUE

.7 MI SOUTH OF I-84, New Haven, CT

Built 1965 Load: 46.0 t ADT: 25,400

ROUTE 63

Over: HOP BROOK

1 MI SOUTH OF RT 84, New Haven, CT

Built 1966 Load: 46.0 t ADT: 13,300

ROUTE 68

Over: FULLING MILL BROOK

1.0 MI E OF ROUTE 63, New Haven, CT

Built 1933 Load: 46.2 t ADT: 12,300

ROUTE 8 NORTHBOUND

Over: STEELE BROOK

1 MILE SOUTH OF EXIT 36, New Haven, CT

Built 1965 Load: 46.3 t ADT: 26,300

BRISTOL STREET #1

Over: NAUGATUCK RIVER

OFF PLATTS MILL ROAD, New Haven, CT

Built 1956 Load: 46.3 t ADT: 2,100

ROUTE 40 NB

Over: SOUTH NEW ROAD

0.2 MI S OF ROUTE 10, New Haven, CT

Built 1976 Load: 46.3 t ADT: 11,300

GRAND AVENUE

Over: MILL RIVER EAST

.2 MI EAST OF EAST STREET, New Haven, CT

Built 1982 Load: 46.5 t ADT: 14,400

UNIVERSAL DR NORTH

Over: CSX RAILROAD

0.2 MI. N Montowese Ave., New Haven, CT

Built 1983 Load: 47.0 t ADT: 671

GRAND AVENUE

Over: MILL RIVER WEST

1 TENTH EAST OF EAST ST, New Haven, CT

Built 1982 Load: 47.1 t ADT: 14,400

INTERSTATE-91 NB

Over: MUDDY RIVER

.8 MI SO OF ROUTE 40, New Haven, CT

Built 1965 Load: 47.2 t ADT: 55,750

PEARL STREET

Over: BLADENS RIVER

0.1 MI SOUTH OF ROUTE 67, New Haven, CT

Built 1924 Load: 47.4 t ADT: 2,333

ROUTE 172

Over: TRANSYLVANIA BROOK

1 MI SOUTH OF JCT RTE 67, New Haven, CT

Built 1935 Load: 47.6 t ADT: 3,900

INTERSTATE-91 SB

Over: SACKETT POINT ROAD

0.7 MI S OF ROUTE 40, New Haven, CT

Built 1965 Load: 47.6 t ADT: 54,700

ROUTE 67

Over: LITTLE RIVER

JUNCTION ROUTE 42 AND 67, New Haven, CT

Built 1933 Load: 47.8 t ADT: 13,900

ROUTE 8

Over: FULLING MILL BROOK

0.9 MILE SO. WATERBURY TL, New Haven, CT

Built 1960 Load: 48.0 t ADT: 51,400

ROUTE 15

Over: CIRCULAR AVENUE

O/CIRCULAR AVENUE, New Haven, CT

Built 1948 Load: 48.0 t ADT: 77,800

EAST AURORA STREET

Over: STEELE BROOK

150 FT NORTH OF ROUTE 73, New Haven, CT

Built 1963 Load: 48.0 t ADT: 8,300

ROUTE 150

Over: QUINNIPIAC RIVER

AT JCT RTE 68 & RTE 150, New Haven, CT

Built 1951 Load: 48.3 t ADT: 13,800

CHESHIRE STREET

Over: QUINNIPIAC RIVER

0.3 MI N OF ROUTE 70, New Haven, CT

Built 1957 Load: 48.3 t ADT: 3,962

RIVER ROAD

Over: POMPERAUG RIVER

NEAR I-84 EXIT 13, New Haven, CT

Built 1962 Load: 48.6 t ADT: 2,000

HANOVER STREET

Over: HARBOR BROOK

660 FT E OF COE AVE, New Haven, CT

Built 1930 Load: 48.6 t ADT: 6,700

ROUTE 8 NORTHBOUND

Over: FIFTH STREET

0.9 MILES SOUTH OF I-84, New Haven, CT

Built 1965 Load: 48.9 t ADT: 25,400

HOWARD AVENUE

Over: METRO NORTH RAILROAD

1.0 MILE NORTH OF I 95, New Haven, CT

Built 1920 Load: 48.9 t ADT: 7,100

ROUTE 34

Over: EIGHT MILE BROOK

2 MILES WEST OF RTE 188, New Haven, CT

Built 1924 Load: 49.0 t ADT: 9,800

FALLS AVENUE

Over: STEELE BROOK

200' NORTH OF ROUTE 73, New Haven, CT

Built 1940 Load: 49.0 t ADT: 4,300

PORTER AVENUE

Over: HOP BROOK

.1 MI EAST OF ROUTE 63, New Haven, CT

Built 1940 Load: 49.3 t ADT: 5,900

ROUTE 162

Over: INDIAN RIVER

2.4 MI E OF US ROUTE 1, New Haven, CT

Built 1988 Load: 49.6 t ADT: 13,200

PLEASANT POINT RD

Over: AMTRAK RAILROAD

.8 MI S. OF ROUTE 146, New Haven, CT

Built 1988 Load: 49.6 t ADT: 132

INTERSTATE-691 WB

Over: LEWIS AVE

AT EXIT 6, New Haven, CT

Built 1971 Load: 50.1 t ADT: 35,300

INTERSTATE-95

Over: BRANFORD STEAM RAILROAD

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

Built 1958 Load: 50.2 t ADT: 65,200

EAST STREET

Over: AMTRAK RAILROAD

.1MI SOUTH OF HUMPHREY ST, New Haven, CT

Built 1906 Load: 50.2 t ADT: 5,300

LOUGHLIN ROAD

Over: EIGHT MILE BROOK

0.4 MI N OF ROUTE 34, New Haven, CT

Built 1956 Load: 50.2 t ADT: 1,080

INTERSTATE-95

Over: EAST TOWN ROAD

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

Built 1958 Load: 50.4 t ADT: 99,700

ROUTE 8 NORTHBOUND

Over: HUNTINGDON AVENUE

.4MI S OF WTRBY WTRTWN TL, New Haven, CT

Built 1964 Load: 50.5 t ADT: 17,900

INTERSTATE 691 EAS

Over: BEE STREET

0.2 MI WEST OF I-91, New Haven, CT

Built 1965 Load: 50.5 t ADT: 22,500

AUGUR ROAD

Over: FARM RIVER

200 FT W OF ROUTE 22, New Haven, CT

Built 1933 Load: 50.5 t ADT: 2,300

ROUTE 8 NORTHBOUND

Over: PAN AM SO. RR SPUR LINE

0.2 MI N OF ROUTE 73, New Haven, CT

Built 1964 Load: 50.7 t ADT: 26,300

ROUTE 8 NORTHBOUND

Over: PORTER STREET

1 MI SOUTH OF I-84 INTER., New Haven, CT

Built 1965 Load: 50.8 t ADT: 25,500

RTE 103(MAPLE AVE)

Over: CSX RAILROAD

2.0 MI S OF ROUTE 22, New Haven, CT

Built 1961 Load: 51.1 t ADT: 7,500

BLAKE STREET

Over: TOWN FARM BROOK

150' W. OF FARNHAM AVENUE, New Haven, CT

Built 1939 Load: 51.1 t ADT: 7,000

I-84 RAMP 198

Over: NO NOTABLE FEATURE

WESTBOUND ON RAMP BANK ST, New Haven, CT

Built 1967 Load: 51.2 t ADT: 4,600

PLEASANT POINT RD

Over: ABANDONED TROLLEY LINE

1 MI SOUTH OF ROUTE 146, New Haven, CT

Built 1989 Load: 51.2 t ADT: 114

NICHOLS ROAD

Over: MAD RIVER

0.6 MI E OF ROUTE 69, New Haven, CT

Built 1935 Load: 51.4 t ADT: 3,340

ROUTE 8

Over: HOUSATONIC RAILROAD

AT EXIT 15, New Haven, CT

Built 1950 Load: 51.8 t ADT: 73,500

INTERSTATE-91 NB

Over: BALDWIN AVENUE

.75 MI NO I-691 & RTE 66, New Haven, CT

Built 1964 Load: 51.8 t ADT: 54,500

MATHER STREET

Over: FARMINGTON CANAL GREENWA

0.1 MI E OF ROUTE 10, New Haven, CT

Built 1942 Load: 51.8 t ADT: 4,800

INTERSTATE-95

Over: ORANGE AVENUE

0.3 MI N OF ROUTE 121, New Haven, CT

Built 1958 Load: 52.2 t ADT: 113,500

ROUTE 15

Over: GILBERT AVE

1.2 MILE WEST OF ROUTE 10, New Haven, CT

Built 1949 Load: 52.2 t ADT: 77,800

HICKS AVENUE

Over: AMTRAK RAILROAD

.2 MILE W OF N COLONY ST, New Haven, CT

Built 1988 Load: 52.2 t ADT: 1,600

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026