US Bridges

RTE 908G over Commack Road

Fair

Suffolk County, New York · 2.6 MI E JCT Rts 231+NSP · Structure no. 000000001058409

Built
1951
74 years old
Condition
Fair
inspected March 2024
Type
Frame
Concrete
Length
71 ft
1 main span
Daily traffic
73,221
2021 count
Owner
State
State Highway Agency

About this bridge

RTE 908G over Commack Road is a concrete frame carrying RTE 908G over Commack Road in Suffolk County, New York. It was built in 1951, so it is 74 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 73,221 vehicles a day, roughly 1% of them trucks, projected to reach 87,096 by 2041. The structure is 71 ft (21.6 m) long and 92 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesRTE 908G
CrossesCommack Road
Location2.6 MI E JCT Rts 231+NSP
RouteState Highway 908G
CountySuffolk County
StateNew York
Coordinates40.81856, -73.29358
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionMarch 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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.2 US tons
Inventory rating25 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length71 ft (21.6 m)
Longest span62 ft (18.8 m)
Deck width92 ft (28 m)
Roadway width85 ft (25.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic73,221 (2021)
Projected traffic87,096 by 2041
Trucks1%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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$7.2 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was RTE 908G over Commack Road built?

It was built in 1951, making it 74 years old in 2025.

What condition is RTE 908G over Commack Road 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 March 2024.

How much traffic does RTE 908G over Commack Road carry?

About 73,221 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is RTE 908G over Commack Road?

The structure is 71 ft (21.6 m) long with a longest span of 62 ft (18.8 m) and a deck 92 ft wide.

Who owns RTE 908G over Commack Road?

It is owned by the State Highway Agency.