US Bridges

INTERSTATE-91 NB over US Route 5

Fair

New Haven County, Connecticut · I-91 Exit No. 12 · Structure no. 03117A

Built
1965
60 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
143 ft
1 main span
Daily traffic
38,000
2022 count
Owner
State
State Highway Agency

About this bridge

INTERSTATE-91 NB over US Route 5 is a steel stringer/multi-beam or girder carrying INTERSTATE-91 NB over US Route 5 in New Haven County, Connecticut. It was built in 1965, so it is 60 years old, older than the Connecticut average of 56.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 38,000 vehicles a day, roughly 9% of them trucks, projected to reach 56,464 by 2042. The structure is 143 ft (43.6 m) long and 66 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesINTERSTATE-91 NB
CrossesUS Route 5
LocationI-91 Exit No. 12
RouteInterstate 91
CountyNew Haven County
StateConnecticut
Coordinates41.39935, -72.85184
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.1 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length143 ft (43.6 m)
Longest span135 ft (41.1 m)
Deck width66 ft (20 m)
Roadway width62 ft (18.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic38,000 (2022)
Projected traffic56,464 by 2042
Trucks9%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was INTERSTATE-91 NB over US Route 5 built?

It was built in 1965, making it 60 years old in 2025.

What condition is INTERSTATE-91 NB over US Route 5 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2024.

How much traffic does INTERSTATE-91 NB over US Route 5 carry?

About 38,000 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is INTERSTATE-91 NB over US Route 5?

The structure is 143 ft (43.6 m) long with a longest span of 135 ft (41.1 m) and a deck 66 ft wide.

Who owns INTERSTATE-91 NB over US Route 5?

It is owned by the State Highway Agency.