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:

BULLET HILL ROAD

Over: INTERSTATE 84 & RAMP 40

0.3 MI W OF US ROUTE 6, New Haven, CT

Built 1963 ADT: 66,400

INTERSTATE 84 EB

Over: US RTE 6, RTE 67, STREAM

INTERSTATE-84 EXIT 15, New Haven, CT

Built 1963 ADT: 15,800

INTERSTATE 84 WB

Over: US RTE 6, RTE 67, STREAM

I-84 WB EXIT NO. 15, New Haven, CT

Built 1963 ADT: 15,800

BUCKS HILL ROAD

Over: INTERSTATE 84

.7 MI WEST OF ROUTE 188, New Haven, CT

Built 1964 ADT: 72,100

INTERSTATE 84 EB

Over: ROUTE 188

EXIT 16 FROM I-84, New Haven, CT

Built 1964 ADT: 9,900

INTERSTATE 84 WB

Over: ROUTE 188

EXIT 16 FROM I-84, New Haven, CT

Built 1964 ADT: 9,900

BENSON ROAD

Over: INTERSTATE 84

0.8 MI EAST OF ROUTE 188, New Haven, CT

Built 1964 ADT: 71,100

CHRISTIAN ROAD

Over: INTERSTATE 84

1.4 MI EAST OF EXIT 16, New Haven, CT

Built 1964 ADT: 73,700

SOUTH STREET

Over: INTERSTATE 84

2.3 MI E SOUTHBURY TL, New Haven, CT

Built 1964 ADT: 71,100

INTERSTATE 84 EB

Over: ROUTE 188

.7 MI WEST OF ROUTE 63, New Haven, CT

Built 1964 ADT: 4,000

INTERSTATE 84 WB

Over: ROUTE 188

.7 MI W OF EXIT 17, New Haven, CT

Built 1964 ADT: 4,000

INTERSTATE 84 EB

Over: ROUTE 63

.5 MI S OF JCT 63 & 64, New Haven, CT

Built 1964 ADT: 13,200

INTERSTATE 84 WB

Over: ROUTE 63

1 MI S OF INT 63 & 64, New Haven, CT

Built 1964 ADT: 13,200

HARPERS FERRY ROAD

Over: INTERSTATE-84

I-84 EXIT NO. 25, New Haven, CT

Built 2018 ADT: 86,700

AUSTIN ROAD

Over: INTERSTATE 84

I-84 EB EXIT 25A, New Haven, CT

Built 1961 ADT: 84,100

MARION ROAD

Over: INTERSTATE 84

1.8 MI E ROUTE 70, New Haven, CT

Built 1961 ADT: 106,300

AMTRAK RAILROAD

Over: ROUTE 146

3.5 MILES S. GUILFORD TL, New Haven, CT

Built 1917 ADT: 1,400

AMTRAK RAILROAD

Over: ROUTE 146

100' S OF SAM HILL ROAD, New Haven, CT

Built 1900 ADT: 3,200

WHEELERS FARMS RD.

Over: SR 796

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

Built 1941 ADT: 59,100

ROUTE 8 RAMP 079

Over: SR 846 NORTHBOUND

RTE 8 SOUTHBOUND EXIT 34, New Haven, CT

Built 1965 ADT: 5,300

ROUTE 8

Over: SR 846 NORTHBOUND

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

Built 1965 ADT: 5,300

ROUTE 8 SOUTHBOUND

Over: ROUTE 73 WESTBOUND

1.1MI NO OF INTERSTATE-84, New Haven, CT

Built 1965 ADT: 13,800

SR 845 (CHASE PARK

Over: INTERSTATE 84 & RAMP 053

CHASE PRKWY AT I-84 EX 18, New Haven, CT

Built 1965 ADT: 79,200

ROUTE 15 NB

Over: INTERSTATE-91 & RAMP 145

2.8 MILES NORTH OF RTE 5, New Haven, CT

Built 1964 ADT: 2,700

I-91 RAMP 145

Over: ROUTE 15 SOUTHBOUND

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

Built 1964 ADT: 35,900

EAST MAIN STREET

Over: I-91,ROUTE 15 & RAMP 147

ROUTE 15 & I91 MERGE, New Haven, CT

Built 1965 ADT: 93,100

I-91 TR 811

Over: ROUTE 15 SOUTHBOUND

.12M S OF JCT I-91SB, New Haven, CT

Built 1964 ADT: 24,900

ROUTE 15 NB

Over: INTERSTATE-91 & TR 3

ADJ TO EXIT#68 TO I691 WB, New Haven, CT

Built 1964 ADT: 47,800

INTERSTATE-691 EB

Over: ROUTE 15

02 MI WEST EXIT ROUTE 15, New Haven, CT

Built 1965 ADT: 23,900

INTERSTATE-691 WB

Over: ROUTE 15

2 MI WEST OF RTE 15 EXIT, New Haven, CT

Built 1965 ADT: 23,900

INTERSTATE-691 EB

Over: INTERSTATE-91

03 WEST OF ACCESS I-91NB, New Haven, CT

Built 1965 ADT: 81,400

INTERSTATE-691 WB

Over: INTERSTATE-91

500' EAST EXIT 10-691 WB., New Haven, CT

Built 1965 ADT: 81,400

INTERSTATE-691 EB

Over: INTERSTATE-691 TR 802

ROUTE 691 OVER TR 802, New Haven, CT

Built 1965 ADT: 18,200

INTERSTATE 691 EB

Over: I-91 TR 813

66 EASTBOUND OVER 91813, New Haven, CT

Built 1965 ADT: 5,000

I-91 TR 816

Over: ROUTE 66 WB

.25 MILES EAST OF EXIT 10, New Haven, CT

Built 1965 ADT: 15,200

ROUTE 68

Over: AMTRAK & US ROUTE 5

3 MILE WEST OF I-91 X-CRS, New Haven, CT

Built 1965 ADT: 22,800

PEDESTRIAN WALK

Over: INTERSTATE 691

0.21 MILES EAST OF RT 322, New Haven, CT

Built 1971 ADT: 66,600

ROUTE 71

Over: INTERSTATE-691

.5 MI WEST OF LEWIS AVE, New Haven, CT

Built 1971 ADT: 66,900

I-691 RAMP 009

Over: I-691RMP 008,COLUMBIA ST

OVER ENT RAMP FROM LEWIS, New Haven, CT

Built 1971 ADT: 8,100

INTERSTATE-691 EB

Over: US ROUTE 5

1.3 MI W OF I-91, New Haven, CT

Built 1971 ADT: 20,800

INTERSTATE-691 WB

Over: US ROUTE 5

I 691 WB OVER ROUTE 5, New Haven, CT

Built 1971 ADT: 20,800

US ROUTE 5

Over: I-91, AMTRAK, RAMP B

0.36N OF RTE 22 BISHOP ST, New Haven, CT

Built 1973 ADT: 88,600

INTERSTATE-91 NB

Over: MILL RV-STATE ST RMP 140

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

Built 1965 ADT: 4,100

I-91 NB RAMP 141

Over: I-91 NB RAMP 140

I91 NB OFF RAMP TO WILLOW, New Haven, CT

Built 1965 ADT: 4,100

INTERSTATE-91 SB

Over: STATE ST MILL RIV RAMPS

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

Built 1965 ADT: 4,000

WILLOW STREET

Over: I91 RMPS 139&141,MILL RV

EXIT # 6 OFF I-91 NB, New Haven, CT

Built 1965 ADT: 4,200

I-91 RAMP 142

Over: INTERSTATE-91 RAMP 143

EXIT 6 I-91 SB(WILLOW ST), New Haven, CT

Built 1965 ADT: 3,400

INTERSTATE-91 NB

Over: US 5 & AMTRAK & FERRY ST

1.1 MI S OF ROUTE 17, New Haven, CT

Built 1964 ADT: 13,900

INTERSTATE-91 SB

Over: US 5 & AMTRAK & FERRY ST

1.0 MI S OF ROUTE 17, New Haven, CT

Built 1964 ADT: 13,900

INTERSTATE-91 SB

Over: I-91 TR 801 & SR 724 EB

AT JCT OF RTE I 91 & I 95, New Haven, CT

Built 1965 ADT: 15,200

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