US Bridges

Route 166 over INTERSTATE-95

Fair

Middlesex County, Connecticut · I-95 Exit No. 66 · Structure no. 00233

Built
1957
68 years old, rebuilt 1993
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
160 ft
2 main spans
Daily traffic
7,500
2022 count
Owner
State
State Highway Agency

About this bridge

Route 166 over INTERSTATE-95 is a steel stringer/multi-beam or girder carrying Route 166 over INTERSTATE-95 in Middlesex County, Connecticut. It was built in 1957 and reconstructed in 1993, so it is 68 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 7,500 vehicles a day, roughly 5% of them trucks, projected to reach 11,144 by 2042. The structure is 160 ft (48.8 m) long and 44 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesRoute 166
CrossesINTERSTATE-95
LocationI-95 Exit No. 66
RouteState Highway 166
CountyMiddlesex County
StateConnecticut
Coordinates41.2906, -72.41973
Functional classUrban Minor Arterial

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.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating53.9 US tons
Inventory rating41.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length160 ft (48.8 m)
Longest span77 ft (23.5 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2022)
Projected traffic11,144 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 Route 166 over INTERSTATE-95 built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1993.

What condition is Route 166 over INTERSTATE-95 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 February 2024.

How much traffic does Route 166 over INTERSTATE-95 carry?

About 7,500 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Route 166 over INTERSTATE-95?

The structure is 160 ft (48.8 m) long with a longest span of 77 ft (23.5 m) and a deck 44 ft wide.

Who owns Route 166 over INTERSTATE-95?

It is owned by the State Highway Agency.