US Bridges

RTE I495 over Lirr- Main Line

Fair

Suffolk County, New York · .8 Mile N JCT I495 & SH24 · Structure no. 000000001056201

Built
1972
53 years old, rebuilt 2015
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
332 ft
3 main spans
Daily traffic
10,907
2018 count
Owner
State
State Highway Agency

About this bridge

RTE I495 over Lirr- Main Line is a steel stringer/multi-beam or girder carrying RTE I495 over Lirr- Main Line in Suffolk County, New York. It was built in 1972 and reconstructed in 2015, so it is 53 years old, younger 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 10,907 vehicles a day, roughly 5% of them trucks, projected to reach 11,452 by 2041. The structure is 332 ft (101.2 m) long and 56 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesRTE I495
CrossesLirr- Main Line
Location.8 Mile N JCT I495 & SH24
RouteInterstate 495
CountySuffolk County
StateNew York
Coordinates40.91366, -72.73348
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.7 US tons
Inventory rating38.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length332 ft (101.2 m)
Longest span134 ft (40.8 m)
Deck width56 ft (17.1 m)
Roadway width53 ft (16.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,907 (2018)
Projected traffic11,452 by 2041
Trucks5%
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$14.4 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was RTE I495 over Lirr- Main Line built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2015.

What condition is RTE I495 over Lirr- Main Line 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 Lirr- Main Line carry?

About 10,907 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is RTE I495 over Lirr- Main Line?

The structure is 332 ft (101.2 m) long with a longest span of 134 ft (40.8 m) and a deck 56 ft wide.

Who owns RTE I495 over Lirr- Main Line?

It is owned by the State Highway Agency.