US Bridges

INTERSTATE-91 SB over Route 150

Fair

New Haven County, Connecticut · I-91 Exit No. 14 · Structure no. 03128B

Built
1965
60 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
66 ft
1 main span
Daily traffic
32,700
2022 count
Owner
State
State Highway Agency

About this bridge

INTERSTATE-91 SB over Route 150 is a steel stringer/multi-beam or girder carrying INTERSTATE-91 SB over Route 150 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 6 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 32,700 vehicles a day, roughly 9% of them trucks, projected to reach 48,589 by 2042. The structure is 66 ft (20.1 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesINTERSTATE-91 SB
CrossesRoute 150
LocationI-91 Exit No. 14
RouteInterstate 91
CountyNew Haven County
StateConnecticut
Coordinates41.43424, -72.80278
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.9 US tons
Inventory rating54 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length66 ft (20.1 m)
Longest span60 ft (18.3 m)
Deck width55 ft (16.9 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,700 (2022)
Projected traffic48,589 by 2042
Trucks9%
Lanes on structure3
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 SB over Route 150 built?

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

What condition is INTERSTATE-91 SB over Route 150 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 September 2023.

How much traffic does INTERSTATE-91 SB over Route 150 carry?

About 32,700 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is INTERSTATE-91 SB over Route 150?

The structure is 66 ft (20.1 m) long with a longest span of 60 ft (18.3 m) and a deck 55 ft wide.

Who owns INTERSTATE-91 SB over Route 150?

It is owned by the State Highway Agency.