US Bridges

INTERSTATE-91 over Route 17

Fair

New Haven County, Connecticut · Exit 8 Route 91 · Structure no. 03096

Built
1965
60 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
184 ft
2 main spans
Daily traffic
112,800
2022 count
Owner
State
State Highway Agency

About this bridge

INTERSTATE-91 over Route 17 is a steel stringer/multi-beam or girder carrying INTERSTATE-91 over Route 17 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 112,800 vehicles a day, roughly 14% of them trucks, projected to reach 167,610 by 2042. The structure is 184 ft (56.1 m) long and 152 ft wide.

CarriesINTERSTATE-91
CrossesRoute 17
LocationExit 8 Route 91
RouteInterstate 91
Coordinates41.32418, -72.88291
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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.7 US tons
Inventory rating37.6 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length184 ft (56.1 m)
Longest span99 ft (30.3 m)
Deck width152 ft (46.2 m)
Roadway width136 ft (41.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic112,800 (2022)
Projected traffic167,610 by 2042
Trucks14%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 over Route 17 built?

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

What condition is INTERSTATE-91 over Route 17 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 2024.

How much traffic does INTERSTATE-91 over Route 17 carry?

About 112,800 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is INTERSTATE-91 over Route 17?

The structure is 184 ft (56.1 m) long with a longest span of 99 ft (30.3 m) and a deck 152 ft wide.

Who owns INTERSTATE-91 over Route 17?

It is owned by the State Highway Agency.