US Bridges

RTE I495 over Holbrook Road

Good

Suffolk County, New York · 4.3 MI W Jt Rts 495I &112 · Structure no. 000000001064061

Built
1998
27 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
97 ft
1 main span
Daily traffic
76,575
2005 count
Owner
State
State Highway Agency

About this bridge

RTE I495 over Holbrook Road is a prestressed concrete box beam or girders - multiple carrying RTE I495 over Holbrook Road in Suffolk County, New York. It was built in 1998, so it is 27 years old, younger than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 76,575 vehicles a day, roughly 13% of them trucks. The structure is 97 ft (29.6 m) long and 79 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesRTE I495
CrossesHolbrook Road
Location4.3 MI W Jt Rts 495I &112
RouteInterstate 495
Coordinates40.81636, -73.07906
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating45 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length97 ft (29.6 m)
Longest span93 ft (28.3 m)
Deck width79 ft (24 m)
Roadway width75 ft (23 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic76,575 (2005)
Projected traffic—
Trucks13%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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$6.3 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was RTE I495 over Holbrook Road built?

It was built in 1998, making it 27 years old in 2025.

What condition is RTE I495 over Holbrook Road in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does RTE I495 over Holbrook Road carry?

About 76,575 vehicles per day (2005 count), of which roughly 13% are trucks.

How long is RTE I495 over Holbrook Road?

The structure is 97 ft (29.6 m) long with a longest span of 93 ft (28.3 m) and a deck 79 ft wide.

Who owns RTE I495 over Holbrook Road?

It is owned by the State Highway Agency.