US Bridges

INTERSTATE-91 SB over Smith Street

Fair

Middlesex County, Connecticut · 1.49 MI South of RTE 372 · Structure no. 03055

Built
1965
60 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
146 ft
3 main spans
Daily traffic
53,400
2019 count
Owner
State
State Highway Agency

About this bridge

INTERSTATE-91 SB over Smith Street is a steel continuous stringer/multi-beam or girder carrying INTERSTATE-91 SB over Smith Street in Middlesex 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 53,400 vehicles a day, roughly 9% of them trucks, projected to reach 79,347 by 2039. The structure is 146 ft (44.5 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesINTERSTATE-91 SB
CrossesSmith Street
Location1.49 MI South of RTE 372
RouteInterstate 91
Coordinates41.58373, -72.71409
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 rating75.3 US tons
Inventory rating45.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length146 ft (44.5 m)
Longest span65 ft (19.8 m)
Deck width55 ft (16.9 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53,400 (2019)
Projected traffic79,347 by 2039
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 Smith Street built?

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

What condition is INTERSTATE-91 SB over Smith Street 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 July 2023.

How much traffic does INTERSTATE-91 SB over Smith Street carry?

About 53,400 vehicles per day (2019 count), of which roughly 9% are trucks.

How long is INTERSTATE-91 SB over Smith Street?

The structure is 146 ft (44.5 m) long with a longest span of 65 ft (19.8 m) and a deck 55 ft wide.

Who owns INTERSTATE-91 SB over Smith Street?

It is owned by the State Highway Agency.