US Bridges

RTE I495 over Long Island- Main

Fair

Suffolk County, New York · East of Exit 68 - I495 · Structure no. 000000001064202

Built
1970
55 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
267 ft
3 main spans
Daily traffic
34,834
2020 count
Owner
State
State Highway Agency

About this bridge

RTE I495 over Long Island- Main is a steel stringer/multi-beam or girder carrying RTE I495 over Long Island- Main in Suffolk County, New York. It was built in 1970, so it is 55 years old, older than the New York average of 53 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 34,834 vehicles a day, roughly 6% of them trucks, projected to reach 36,575 by 2041. The structure is 267 ft (81.4 m) long and 45 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesRTE I495
CrossesLong Island- Main
LocationEast of Exit 68 - I495
RouteInterstate 495
CountySuffolk County
StateNew York
Coordinates40.85088, -72.86086
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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106.5 US tons
Inventory rating82.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length267 ft (81.4 m)
Longest span85 ft (25.9 m)
Deck width45 ft (13.7 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,834 (2020)
Projected traffic36,575 by 2041
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed0.6 mi (1 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$9.1 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was RTE I495 over Long Island- Main built?

It was built in 1970, making it 55 years old in 2025.

What condition is RTE I495 over Long Island- Main 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 RTE I495 over Long Island- Main carry?

About 34,834 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is RTE I495 over Long Island- Main?

The structure is 267 ft (81.4 m) long with a longest span of 85 ft (25.9 m) and a deck 45 ft wide.

Who owns RTE I495 over Long Island- Main?

It is owned by the State Highway Agency.