US Bridges

NB RTE 85 On-Ramp over Interstate 280

Fair

Santa Clara County, California · 04-SCL-085-R18.40-SUNV · Structure no. 37 0545S

Built
1993
32 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
288 ft
2 main spans
Daily traffic
6,600
2004 count
Owner
State
State Highway Agency

About this bridge

NB RTE 85 On-Ramp over Interstate 280 is a prestressed concrete continuous box beam or girders - multiple carrying NB RTE 85 On-Ramp over Interstate 280 in Santa Clara County, California. It was built in 1993, so it is 32 years old, younger 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 6,600 vehicles a day, roughly 1% of them trucks, projected to reach 10,476 by 2044. The structure is 288 ft (87.8 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesNB RTE 85 On-Ramp
CrossesInterstate 280
Location04-SCL-085-R18.40-SUNV
RouteState Highway 85
CountySanta Clara County
StateCalifornia
Coordinates37.33253, -122.05354
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length288 ft (87.8 m)
Longest span143 ft (43.5 m)
Deck width31 ft (9.6 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,600 (2004)
Projected traffic10,476 by 2044
Trucks1%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was NB RTE 85 On-Ramp over Interstate 280 built?

It was built in 1993, making it 32 years old in 2025.

What condition is NB RTE 85 On-Ramp over Interstate 280 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 NB RTE 85 On-Ramp over Interstate 280 carry?

About 6,600 vehicles per day (2004 count), of which roughly 1% are trucks.

How long is NB RTE 85 On-Ramp over Interstate 280?

The structure is 288 ft (87.8 m) long with a longest span of 143 ft (43.5 m) and a deck 31 ft wide.

Who owns NB RTE 85 On-Ramp over Interstate 280?

It is owned by the State Highway Agency.