US Bridges

NB Interstate 280 over Arastradero Road

Fair

Santa Clara County, California · 04-SCL-280-17.78-LAH · Structure no. 37 0251R

Built
1967
58 years old
Condition
Fair
inspected February 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
132 ft
2 main spans
Daily traffic
58,500
2009 count
Owner
State
State Highway Agency

About this bridge

NB Interstate 280 over Arastradero Road is a concrete continuous box beam or girders - multiple carrying NB Interstate 280 over Arastradero Road in Santa Clara County, California. It was built in 1967, so it is 58 years old, older than the California average of 54.8 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 58,500 vehicles a day, roughly 2% of them trucks, projected to reach 81,506 by 2046. The structure is 132 ft (40.2 m) long and 69 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesNB Interstate 280
CrossesArastradero Road
Location04-SCL-280-17.78-LAH
RouteInterstate 280
CountySanta Clara County
StateCalifornia
Coordinates37.38639, -122.15314
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 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 alignment7: Better than present minimum criteria
Operating rating56.1 US tons
Inventory rating33.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length132 ft (40.2 m)
Longest span71 ft (21.6 m)
Deck width69 ft (21.1 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58,500 (2009)
Projected traffic81,506 by 2046
Trucks2%
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was NB Interstate 280 over Arastradero Road built?

It was built in 1967, making it 58 years old in 2025.

What condition is NB Interstate 280 over Arastradero 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 February 2024.

How much traffic does NB Interstate 280 over Arastradero Road carry?

About 58,500 vehicles per day (2009 count), of which roughly 2% are trucks.

How long is NB Interstate 280 over Arastradero Road?

The structure is 132 ft (40.2 m) long with a longest span of 71 ft (21.6 m) and a deck 69 ft wide.

Who owns NB Interstate 280 over Arastradero Road?

It is owned by the State Highway Agency.