US Bridges

N280-W92 Connector over Interstate 280 SR 92

Fair

San Mateo County, California · 04-SM-280-10.91 · Structure no. 35 0244G

Built
1974
51 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
1,436 ft
6 main spans
Daily traffic
3,700
2003 count
Owner
State
State Highway Agency

About this bridge

N280-W92 Connector over Interstate 280 SR 92 is a prestressed concrete continuous box beam or girders - multiple carrying N280-W92 Connector over Interstate 280 SR 92 in San Mateo County, California. It was built in 1974, so it is 51 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 3,700 vehicles a day, roughly 2% of them trucks, projected to reach 11,757 by 2040. The structure is 1,436 ft (437.8 m) long and 44 ft wide.

Location

Open in Google Maps
CarriesN280-W92 Connector
CrossesInterstate 280 SR 92
Location04-SM-280-10.91
RouteInterstate 280
CountySan Mateo County
StateCalifornia
Coordinates37.50635, -122.33637
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
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.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
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 geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6 (+4 approach)
Design loadHS 20 + Mod
Structure length1,436 ft (437.8 m)
Longest span187 ft (57.1 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,700 (2003)
Projected traffic11,757 by 2040
Trucks2%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 N280-W92 Connector over Interstate 280 SR 92 built?

It was built in 1974, making it 51 years old in 2025.

What condition is N280-W92 Connector over Interstate 280 SR 92 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 October 2023.

How much traffic does N280-W92 Connector over Interstate 280 SR 92 carry?

About 3,700 vehicles per day (2003 count), of which roughly 2% are trucks.

How long is N280-W92 Connector over Interstate 280 SR 92?

The structure is 1,436 ft (437.8 m) long with a longest span of 187 ft (57.1 m) and a deck 44 ft wide.

Who owns N280-W92 Connector over Interstate 280 SR 92?

It is owned by the State Highway Agency.