US Bridges

INTERSTATE-91 NB over Route 159

Good

Hartford County, Connecticut · 300 North of Exit 34 NB · Structure no. 05881A

Built
1991
34 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
165 ft
1 main span
Daily traffic
64,700
2022 count
Owner
State
State Highway Agency

About this bridge

INTERSTATE-91 NB over Route 159 is a steel stringer/multi-beam or girder carrying INTERSTATE-91 NB over Route 159 in Hartford County, Connecticut. It was built in 1991, so it is 34 years old, younger than the Connecticut average of 56.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 64,700 vehicles a day, roughly 9% of them trucks, projected to reach 96,138 by 2042. The structure is 165 ft (50.2 m) long and 79 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesINTERSTATE-91 NB
CrossesRoute 159
Location300 North of Exit 34 NB
RouteInterstate 91
Coordinates41.80462, -72.65883
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating94.6 US tons
Inventory rating56.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length165 ft (50.2 m)
Longest span157 ft (47.9 m)
Deck width79 ft (24.2 m)
Roadway width75 ft (22.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64,700 (2022)
Projected traffic96,138 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 Route 159 built?

It was built in 1991, making it 34 years old in 2025.

What condition is INTERSTATE-91 NB over Route 159 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does INTERSTATE-91 NB over Route 159 carry?

About 64,700 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is INTERSTATE-91 NB over Route 159?

The structure is 165 ft (50.2 m) long with a longest span of 157 ft (47.9 m) and a deck 79 ft wide.

Who owns INTERSTATE-91 NB over Route 159?

It is owned by the State Highway Agency.