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:

AMTRAK NE CORRIDOR

Over: US ROUTE 1

1.4 MI EAST OF RTE 146, New Haven, CT

Built 1926 ADT: 8,900

ROUTE 15

Over: US ROUTE 5

1.23 MI SOUTH OF MERIDEN, New Haven, CT

Built 1998 ADT: 24,700

ROUTE 8

Over: ROUTE 34 & RR Drive

ROUTE 8, EXIT 15, New Haven, CT

Built 1951 ADT: 42,300

ROUTE 8

Over: SR 727 SB PERSHING DRIVE

0.6 MI N OF ROUTE 34, New Haven, CT

Built 1951 ADT: 9,200

HAWKINS STREET

Over: ROUTE 8

0.9 MILES NORTH ROUTE 34, New Haven, CT

Built 1952 ADT: 66,600

BLUFF STREET

Over: ROUTE 8

1.3 MI N OF ROUTE 34, New Haven, CT

Built 1959 ADT: 65,000

ROUTE 334

Over: ROUTE 8

2.9 MI NORTH OF ROUTE 34, New Haven, CT

Built 1959 ADT: 55,300

ROUTE 8

Over: SR 728 (DERBY AVENUE)

.1 MI N OF EXIT 21 RTE 8N, New Haven, CT

Built 1961 ADT: 3,100

ROUTE 8

Over: RTE 313 & NAUGATUCK RIV

0.3 MI S OF ROUTE 67, New Haven, CT

Built 1961 ADT: 3,000

ROUTE 8

Over: RTE 67,METRO N & RAMP 49

ROUTE 8 AT EXIT 22, New Haven, CT

Built 1962 ADT: 2,700

ROUTE 8

Over: ROUTE 63

1.2 MI NO BEACON FALLS TL, New Haven, CT

Built 1960 ADT: 12,400

ROUTE 8

Over: SR 709 SOUTH MAIN STREET

AT EXIT 26 ROUTE 8 SB., New Haven, CT

Built 1960 ADT: 5,000

ROUTE 8

Over: MAPLE & OAK ST, RAMP 063

ROUTE 8 EXIT 27, New Haven, CT

Built 1960 ADT: 3,300

ROUTE 8

Over: ROUTE 8 RAMP 064

ROUTE 8 EXIT NO. 27, New Haven, CT

Built 1960 ADT: 1,100

ROUTE 8

Over: ROUTE 8 SB ON RAMP

AT EXIT 28, New Haven, CT

Built 1960 ADT: 4,900

ROUTE 68

Over: NAUG RV,RTE 8,MNRR,SR710

RT 68 OVER RTE 8,METRO N., New Haven, CT

Built 1960 ADT: 51,400

ROUTE 8

Over: ROUTE 8 RAMP 069

EXIT 28 ROUTE 8 SB, New Haven, CT

Built 1960 ADT: 4,400

ROUTE 15

Over: ROUTE 10

ROUTE 15 EXIT NO. 60, New Haven, CT

Built 1948 ADT: 13,500

FARMINGTON CANAL

Over: ROUTE 10

0.9 MI N OF ROUTE 15, New Haven, CT

Built 1928 ADT: 18,400

ROUTE 15

Over: SR 707(WHITNEY AVE.)

1.3 MI EAST OF ROUTE 10, New Haven, CT

Built 1946 ADT: 13,500

ROUTE 15

Over: SR 796

0.8 MI N OF ROUTE 110, New Haven, CT

Built 1940 ADT: 28,700

DERBY MILFORD ROAD

Over: ROUTE 15

3.7 MI N. OF ROUTE 110, New Haven, CT

Built 1941 ADT: 95,800

ROUTE 121

Over: ROUTE 15

1.3 MI S OF ROUTE 34, New Haven, CT

Built 1941 ADT: 94,600

ROUTE 34

Over: ROUTE 15

ROUTE 15 EXIT 57/58, New Haven, CT

Built 1941 ADT: 66,100

ROUTE 114

Over: ROUTE 15

0.9 MI N OF ROUTE 34, New Haven, CT

Built 1949 ADT: 72,300

JOHNSON ROAD

Over: ROUTE 15

1.1 MI N OF ROUTE 114, New Haven, CT

Built 1949 ADT: 72,300

ROUTE 15

Over: ROUTE 243

1 MILE WEST OF ROUTE 63, New Haven, CT

Built 1948 ADT: 8,200

ROUTE 15

Over: ROUTE 63

3.7 MI W. OF ROUTE 10, New Haven, CT

Built 1948 ADT: 11,600

ROUTE 15

Over: ROUTE 69 & WEST RIVER

.3MI NO OF RT 63 & 69 INT, New Haven, CT

Built 1949 ADT: 15,300

WOODIN STREET

Over: ROUTE 15

2.3 MI S OF ROUTE 10, New Haven, CT

Built 1949 ADT: 79,200

WINTERGREEN AVENUE

Over: ROUTE 15

1.5 MI SOUTH OF RTE 10, New Haven, CT

Built 1949 ADT: 73,900

BENHAM STREET

Over: ROUTE 15

0.3 MI S OF ROUTE 10, New Haven, CT

Built 1949 ADT: 77,800

SKIFF STREET

Over: ROUTE 15

0.8 MI N OF ROUTE 10, New Haven, CT

Built 1948 ADT: 72,600

ROUTE 15

Over: SR 717 (DIXWELL AVE)

0.7 MI S OF ROUTE 40, New Haven, CT

Built 1946 ADT: 14,000

RIDGE ROAD # 1

Over: ROUTE 15

0.5 MI SOUTH OF ROUTE 22, New Haven, CT

Built 1949 ADT: 70,400

HARTFORD TPKE #1

Over: ROUTE 15

1 TENTH SOUTH OF ROUTE 22, New Haven, CT

Built 1947 ADT: 70,400

ROUTE 22

Over: ROUTE 15

AT EXIT 63 OF ROUTE 15, New Haven, CT

Built 1947 ADT: 67,800

UPPER STATE STREET

Over: ROUTE 15

.3 MILES NORTH ROUTE 22, New Haven, CT

Built 1947 ADT: 68,200

ROUTE 150

Over: ROUTE 15

AT EXIT 65 OF ROUTE 15 NB, New Haven, CT

Built 1947 ADT: 61,100

ROUTE 15

Over: ROUTE 68

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

Built 1946 ADT: 19,400

YALE AVENUE

Over: ROUTE 15

0.5 MI N OF ROUTE 68, New Haven, CT

Built 1947 ADT: 76,400

BALDWIN AVENUE

Over: ROUTE 15

.3 MILES NORTH I-691, New Haven, CT

Built 1946 ADT: 24,600

CHURCH ST SOUTH #1

Over: ROUTE 34

BTWN N & S FRONTAGE ROADS, New Haven, CT

Built 1960 ADT: 43,000

INTERSTATE-84 WB

Over: ROUTE 70

2.4 MI W OF I-691, New Haven, CT

Built 1961 ADT: 13,700

INTERSTATE-84 EB

Over: ROUTE 70

2.4 MI W OF I-691, New Haven, CT

Built 1961 ADT: 13,700

AMTRAK

Over: ROUTE 71

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

Built 1841 ADT: 10,700

BRANFORD STEAM RR

Over: ROUTE 80

0.1 MI W OF ROUTE 139, New Haven, CT

Built 2006 ADT: 19,100

ICHABOD ROAD

Over: INTERSTATE 84

BTWN I-84 EXITS 13 & 14, New Haven, CT

Built 1963 ADT: 75,100

INTERSTATE 84 EB

Over: ROUTE 172

AT EXIT 14, New Haven, CT

Built 1963 ADT: 8,200

INTERSTATE 84 WB

Over: ROUTE 172

EXIT 14, New Haven, CT

Built 1963 ADT: 8,200

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