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:

I-91 NB & RAMP 136

Over: EAST STREET

1.2 MI N OF I-95, New Haven, CT

Built 1965 Load: 36.0 t ADT: 78,800

ROUTE 8 NORTHBOUND

Over: METRO-NORTH RAILROAD

.7 MI NO NUGTCK WTBRY TL, New Haven, CT

Built 1966 Load: 36.0 t ADT: 26,900

INDIAN NECK AVENUE

Over: BRANFORD RIVER

.5 MI NORTH OF ROUTE 146, New Haven, CT

Built 1991 Load: 36.3 t ADT: 3,860

HELLSTROM ROAD

Over: FARM RIVER

750 FT E. OF ROUTE 100, New Haven, CT

Built 1980 Load: 36.4 t ADT: 986

INTERSTATE 84 EB

Over: PETER ROAD

.9 MILE EAST OF ROUTE 172, New Haven, CT

Built 1963 Load: 36.6 t ADT: 36,400

I-84 TR 812

Over: RIVERSIDE ST,NAUGATUCK R

EXIT 19, 84 WB TO 8 SB, New Haven, CT

Built 1966 Load: 36.6 t ADT: 11,700

ROUTE 40 SB

Over: SOUTH NEW ROAD

0.2 MI S OF ROUTE 10, New Haven, CT

Built 1976 Load: 36.6 t ADT: 11,700

NAUGATUCK AVENUE

Over: METRO NORTH RAILROAD

0.2 MILE NORTH OF I95, New Haven, CT

Built 1913 Load: 36.8 t ADT: 3,790

ROUTE 8 NORTHBOUND

Over: NAUGATUCK RV-LOCAL ROADS

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

Built 1966 Load: 36.9 t ADT: 27,300

ROUTE 68

Over: P&W RR

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

Built 1967 Load: 37.0 t ADT: 13,200

MAPLE STREET

Over: NAUGATUCK RIVER

OFF EXIT 27 ROUTE 8 SB, New Haven, CT

Built 1912 Load: 37.2 t ADT: 13,000

COLLEGE STREET

Over: SOUTH SERVICE DRIVE

COLLEGE ST O S SERV DR, New Haven, CT

Built 2015 Load: 37.3 t ADT: 13,587

ROUTE 80

Over: HAMMONASSET RIVER

1.4 MI E OF ROUTE 79, New Haven, CT

Built 1934 Load: 37.6 t ADT: 4,600

SR 847 (THOMASTON

Over: NAUGATUCK RAILROAD

.6 MI NORTH OF W. MAIN ST, New Haven, CT

Built 1981 Load: 37.6 t ADT: 8,000

INTERSTATE-691 WB

Over: KNOTTER DRIVE

1.1 MI W OF ROUTE 10, New Haven, CT

Built 1986 Load: 37.6 t ADT: 28,500

INTERSTATE-91 NB

Over: AMTRAK RAILROAD

.65 MI N OF ROUTE 22, New Haven, CT

Built 1965 Load: 37.9 t ADT: 43,200

CEDAR STREET NO. 1

Over: METRO NORTH RAILROAD

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

Built 1906 Load: 37.9 t ADT: 3,092

SPRING STREET

Over: WEST RIVER

0.1 MI WEST OF RTE 10, New Haven, CT

Built 1999 Load: 38.1 t ADT: 5,100

INTERSTATE 84 EB

Over: SANDY HILL ROAD

0.6 MI E OF SOUTH ST BR, New Haven, CT

Built 1964 Load: 38.2 t ADT: 36,900

SR 723

Over: FULLING MILL BROOK

150 FT SOUTH OF ROUTE 68, New Haven, CT

Built 1959 Load: 38.2 t ADT: 10,400

ROUTE 68

Over: QUINNIPIAC RIVER

150' EAST OF ROUTE 150, New Haven, CT

Built 1965 Load: 38.2 t ADT: 20,900

INTERSTATE 84 WB

Over: BIOSKI ROAD

1.6 MI WEST OF ROUTE 63, New Haven, CT

Built 1964 Load: 38.6 t ADT: 36,800

ROUTE 67

Over: LITTLE RIVER

1.0 MI E OF ROUTE 42, New Haven, CT

Built 1933 Load: 38.8 t ADT: 13,700

US ROUTE 1

Over: HAMMONASSET RIVER

Madison\Clinton Townline, New Haven, CT

Built 1961 Load: 38.9 t ADT: 8,000

ROUTE 313

Over: NAUGATUCK RIVER

450 FEET EAST OF ROUTE 8, New Haven, CT

Built 1958 Load: 38.9 t ADT: 9,900

ROUTE 8 SOUTHBOUND

Over: STEELE BROOK

1.2 MILES NORTH OF I-84, New Haven, CT

Built 1965 Load: 38.9 t ADT: 25,900

ROUTE 8 NORTHBOUND

Over: BANK & S.LEONARD STREETS

.6 MI SOUTH OF INTERST 84, New Haven, CT

Built 1966 Load: 38.9 t ADT: 25,300

COURT STREET

Over: METRO NORTH RAILROAD

1 TENTH EAST OF STATE ST, New Haven, CT

Built 1907 Load: 38.9 t ADT: 408

FERRY STREET

Over: AMTRAK RAILROAD

0.03 MI E OF JCT RTE 5, New Haven, CT

Built 1912 Load: 38.9 t ADT: 13,600

ROUTE 67

Over: NAUGATUCK RIVER

JUST WEST OF ROUTE 313, New Haven, CT

Built 1936 Load: 39.0 t ADT: 15,600

WHITFIELD STREET

Over: SLUICE CREEK

1 MILE SOUTH OF RTE 146, New Haven, CT

Built 1999 Load: 39.1 t ADT: 1,872

INTERSTATE 84 EB

Over: LONG MEADOW ROAD

1.3 MI E MDBRY-SOBRY TL, New Haven, CT

Built 1964 Load: 39.2 t ADT: 36,900

INTERSTATE-691 EB

Over: NOTCH ROAD

0.8 M E OF SOUTHINGTON, New Haven, CT

Built 1971 Load: 39.2 t ADT: 35,000

OLD GRASSY HILL RD

Over: WEPAWAUG RIVER

0.1 MI E OF ROUTE 121, New Haven, CT

Built 1941 Load: 39.2 t ADT: 6,400

ROUTE 10

Over: WILLOW BROOK

3.4 MI N OF ROUTE 40, New Haven, CT

Built 1991 Load: 39.2 t ADT: 15,300

SR 796 WESTBOUND

Over: WELLINGTON ROAD EXT.

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

Built 1992 Load: 39.2 t ADT: 5,800

INTERSTATE-95

Over: METRO NORTH RAILROAD

0.1 M S OF EX 35, I-95, New Haven, CT

Built 1957 Load: 39.5 t ADT: 95,100

I-91 132,134,136

Over: STATE STREET

0.1 MI E OF ORANGE STREET, New Haven, CT

Built 1965 Load: 39.5 t ADT: 20,800

OLD STATE ROAD #3

Over: LITTLE RIVER

100' EAST OF JCT RT 67&42, New Haven, CT

Built 2001 Load: 39.5 t ADT: 407

CHAPEL STREET

Over: MILL RIVER

500' EAST OF EAST STREET, New Haven, CT

Built 1992 Load: 39.5 t ADT: 7,794

WESTFIELD ROAD

Over: HARBOR BROOK

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

Built 1938 Load: 39.8 t ADT: 2,700

INTERSTATE 84 WB

Over: LONG MEADOW ROAD

1.3 MI E MDBY-SOBRY TL, New Haven, CT

Built 1964 Load: 39.9 t ADT: 36,800

KIRKHAM STREET

Over: AMTRAK RAILROAD

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

Built 1892 Load: 40.0 t ADT: 5,000

ROUTE 243

Over: RACE BROOK

0.6 MILE WEST ROUTE 313, New Haven, CT

Built 1996 Load: 40.2 t ADT: 3,100

ROUTE 8 SOUTHBOUND

Over: METRO NORTH RAILROAD

.7 MI N OF NAUG./WTBY TL, New Haven, CT

Built 1966 Load: 40.2 t ADT: 25,800

INTERSTATE-91 NB

Over: CSX RAILROAD

2.3 MI N OF ROUTE 17, New Haven, CT

Built 1965 Load: 40.3 t ADT: 58,600

ROUTE 68

Over: HOP BROOK

AT JUNCTION WITH ROUTE 63, New Haven, CT

Built 1933 Load: 40.4 t ADT: 10,800

ROUTE 103

Over: MUDDY RIVER

1.2 MI N0 MONTOWESE AVE, New Haven, CT

Built 1961 Load: 40.5 t ADT: 7,700

ROUTE 8 NORTHBOUND

Over: NICHOLS DRIVE

1.3 MILE NORTH OF EXIT 29, New Haven, CT

Built 1965 Load: 40.5 t ADT: 27,000

WASHINGTON AVE #3

Over: NAUGATUCK RIVER

0.2 MI E OF RT 8 SB EX.30, New Haven, CT

Built 1956 Load: 40.5 t ADT: 6,000

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