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:

FACTORY WALK

Over: ROUTE 73

150' EAST OF WATERTOWN TL, New Haven, CT

Built 1900 ADT: 6,700

ROUTE 40 NB

Over: I-91 & TR 806,RTE 40-007

0.4 MI N OF I-91 NB, New Haven, CT

Built 1972 ADT: 9,760

ROUTE 40 NB RAMP 0

Over: I-91 NB TR 806

0.6 MI W OF ROUTE 103, New Haven, CT

Built 1972 ADT: 5,500

I-91 TR 806

Over: INTERSTATE-91

.30M N OF NB JCT NB RTE40, New Haven, CT

Built 1972 ADT: 85,200

ROUTE 40 NB

Over: US ROUTE 5

AT EXIT 1 NORTHBOUND, New Haven, CT

Built 1972 ADT: 12,300

ROUTE 40 SB

Over: US ROUTE 5

AT ON RAMP FOR EXIT 1, New Haven, CT

Built 1972 ADT: 12,300

PEDESTRIAN WALK

Over: ROUTE 10

0.7 MI N OF ROUTE 63, New Haven, CT

Built 1968 ADT: 13,769

ROUTE 40 SB

Over: ROUTE 15 (WILBUR CROSS)

1.8 MILES NORTH OF I-91, New Haven, CT

Built 1976 ADT: 70,400

ROUTE 40 NB

Over: ROUTE 15 (WILBUR CROSS)

1.8 MI NORTH OF I-91, New Haven, CT

Built 1976 ADT: 66,700

ROUTE 22

Over: ROUTE 40

0.9 MI S OF ROUTE 10, New Haven, CT

Built 1976 ADT: 23,000

ROUTE 40 SB

Over: ROUTE 22 & MILL RIVER

0.3 MILE S. OF ROUTE 10, New Haven, CT

Built 1976 ADT: 4,200

ROUTE 40 NB

Over: ROUTE 22 & MILL RIVER

0.3 MILE S. OF ROUTE 10, New Haven, CT

Built 1976 ADT: 4,200

ROUTE 40 SB

Over: ROUTE 10

3MI NORTHOF INTERSTATE 91, New Haven, CT

Built 1976 ADT: 12,900

RIVER ROAD #1

Over: INTERSTATE 84

I-84 EXIT 13, New Haven, CT

Built 1978 ADT: 73,400

BALDWIN STREET #1

Over: I-84, RAMPS & LOCAL RDS

BETWEEN I84 EXIT 23 & 24, New Haven, CT

Built 1978 ADT: 15,100

ROUTE 69

Over: INTERSTATE 84

AT EXIT23 INTERSTATE 84 W, New Haven, CT

Built 2018 ADT: 5,500

SR721-NO MAIN ST

Over: ROUTE 8

.8M N OF RT 67 (EX 22,RT8, New Haven, CT

Built 1981 ADT: 52,700

ROUTE 8

Over: RTE 42 & NAUGATUCK RIVER

RTE 8 NEAR EXIT 23, New Haven, CT

Built 1981 ADT: 8,200

LOPUS ROAD

Over: ROUTE 8

BET. RTE 8 EXIT 23 & 24, New Haven, CT

Built 1981 ADT: 47,400

ROUTE 8 SOUTHBOUND

Over: MNRR, NAUGTCK RV

RTE 8 EXIT 24, New Haven, CT

Built 1981 ADT: 3,000

ROUTE 8 NORTHBOUND

Over: METRO NORTH & NAUGTCK RV

RTE 8 EXIT 24, New Haven, CT

Built 1981 ADT: 3,000

ROUTE 10

Over: INTERSTATE 691

I-691 EXIT 3, New Haven, CT

Built 1984 ADT: 50,300

PADDOCK AVENUE

Over: ROUTE 15

1/3 MI SOUTH OF I-91, New Haven, CT

Built 1946 ADT: 75,800

AMTRAK RAILROAD

Over: ROUTE 146

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

Built 1900 ADT: 4,600

AMTRAK RAILROAD

Over: ROUTE 146

.24 MI W OF NEW QUARRY RD, New Haven, CT

Built 1917 ADT: 1,500

DICKERMAN ROAD

Over: INTERSTATE-691

0.5 MI WEST OF ROUTE 10, New Haven, CT

Built 1986 ADT: 55,500

ABANDONED RAILROAD

Over: INTERSTATE-691

1 MI E OF EXIT 2 RTE 691, New Haven, CT

Built 1987 ADT: 55,500

PECK LANE

Over: INTERSTATE-691

0.7 MI WEST OF EXIT 3, New Haven, CT

Built 1986 ADT: 55,500

US ROUTE 5 NB

Over: ROUTE 15

1.2 MILES NORTH OF I-691, New Haven, CT

Built 1946 ADT: 24,600

WOODWARD AVENUE

Over: INTERSTATE-95

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

Built 2006 ADT: 89,600

ROUTE 100

Over: US ROUTE 1 & AMTRAK RR

0.1 MILE SOUTH OF I-95, New Haven, CT

Built 1992 ADT: 25,100

I-84 RAMP 059

Over: I-84 WESTBOUND ON-RAMP

EXIT 22 I-84 WEST BOUND, New Haven, CT

Built 1997 ADT: 14,800

I-84 EB EXIT 23 ON

Over: I-84 EB EXIT 25 OFF RAMP

AT INTER WITH ROUTE 69, New Haven, CT

Built 2018 ADT: 5,500

INTERSTATE 91 NB

Over: SR 724 Eastbound

AT I-95/I-91/Rte 34 Inter, New Haven, CT

Built 2015 ADT: 26,700

I-95 SB RAMP 347A

Over: INTERSTATE-95

0.1 MI S OF ROUTE 337, New Haven, CT

Built 2006 ADT: 89,600

PEDESTRIAN CROSSNG

Over: ROUTE 10

320 FT S OF ROUTE 34, New Haven, CT

Built 2006 ADT: 24,700

US ROUTE 1

Over: METRO NORTH RAILROAD

2.5 MI S OF I-95, New Haven, CT

Built 1933 Load: 14.3 t ADT: 13,536

QUINNIPIAC STREET

Over: QUINNIPIAC RIVER

150 FT E. OF ROUTE 15, New Haven, CT

Built 1938 Load: 18.1 t ADT: 12,500

ROUTE 8 SOUTHBOUND

Over: BANK & S.LEONARD STREETS

AT EXIT 30 ROUTE 8 SB, New Haven, CT

Built 1965 Load: 18.8 t ADT: 23,800

HALL AVENUE

Over: AMTRAK RAILROAD

500' E OF ROUTE 71, New Haven, CT

Built 1946 Load: 19.4 t ADT: 7,200

ROUTE 67

Over: BLADENS RIVER

0.9 MI E OF ROUTE 8, New Haven, CT

Built 1928 Load: 20.4 t ADT: 11,100

US ROUTE 1

Over: METRO NORTH RAILROAD

AT INT. WITH STATE ST. N, New Haven, CT

Built 1900 Load: 20.7 t ADT: 7,100

I-91 SB & RAMP #13

Over: EAST STREET

1.2 MI N I-95, New Haven, CT

Built 1965 Load: 20.7 t ADT: 73,400

ROUTE 172

Over: POMPERAUG RIVER

I 84 EXIT 14 & 1 MILE NOR, New Haven, CT

Built 1939 Load: 21.1 t ADT: 7,000

ROUTE 40 SB

Over: CSX RR, QUINNIPIAC RIVER

0.6 MI N OF I-91 NB, New Haven, CT

Built 1972 Load: 21.1 t ADT: 22,200

ROUTE 42

Over: NAUGATUCK RIVER AND MNRR

0.4 MILE WEST OF ROUTE 8, New Haven, CT

Built 1966 Load: 21.4 t ADT: 7,100

ROUTE 142

Over: FARM RIVER

.75 MI EAST OF ROUTE 704, New Haven, CT

Built 1942 Load: 22.0 t ADT: 4,500

RIVER ROAD

Over: HAMMONASSET RIVER

0.1 MI S OF NOD ROAD, New Haven, CT

Built 1935 Load: 22.4 t ADT: 2,833

SR 736 - BUCKINGHA

Over: GULF POND

0.4 MI E OF ROUTE 162, New Haven, CT

Built 1951 Load: 23.0 t ADT: 5,300

HORTON HILL RD.

Over: MARKS BROOK

.13 mi. north of Route 63, New Haven, CT

Built 1940 Load: 23.0 t ADT: 2,700

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