US Bridges

RTE 454 over Lirr-Main Line

Fair

Suffolk County, New York · 1.1 MI SE JCT Rts 454+495 · Structure no. 000000001056049

Built
1950
75 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete Continuous
Length
169 ft
3 main spans
Daily traffic
34,464
2020 count
Owner
State
State Highway Agency

About this bridge

RTE 454 over Lirr-Main Line is a concrete continuous tee beam carrying RTE 454 over Lirr-Main Line in Suffolk County, New York. It was built in 1950, so it is 75 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 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 34,464 vehicles a day, roughly 11% of them trucks, projected to reach 39,764 by 2041. The structure is 169 ft (51.5 m) long and 69 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesRTE 454
CrossesLirr-Main Line
Location1.1 MI SE JCT Rts 454+495
RouteState Highway 454
CountySuffolk County
StateNew York
Coordinates40.79669, -73.17154
Functional classUrban Other Principal 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45 US tons
Inventory rating27 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length169 ft (51.5 m)
Longest span67 ft (20.4 m)
Deck width69 ft (20.9 m)
Roadway width62 ft (19 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,464 (2020)
Projected traffic39,764 by 2041
Trucks11%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemYes

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$6 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was RTE 454 over Lirr-Main Line built?

It was built in 1950, making it 75 years old in 2025.

What condition is RTE 454 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 June 2024.

How much traffic does RTE 454 over Lirr-Main Line carry?

About 34,464 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is RTE 454 over Lirr-Main Line?

The structure is 169 ft (51.5 m) long with a longest span of 67 ft (20.4 m) and a deck 69 ft wide.

Who owns RTE 454 over Lirr-Main Line?

It is owned by the State Highway Agency.