US Bridges

Interstate 280 SB over Rancho Pulgas Vista Road

Fair

San Mateo County, California · 04-SM-280-9.41 · Structure no. 35 0247L

Built
1973
52 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
106 ft
1 main span
Daily traffic
51,500
2009 count
Owner
State
State Highway Agency

About this bridge

Interstate 280 SB over Rancho Pulgas Vista Road is a prestressed concrete box beam or girders - multiple carrying Interstate 280 SB over Rancho Pulgas Vista Road in San Mateo County, California. It was built in 1973, so it is 52 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 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 51,500 vehicles a day, projected to reach 69,524 by 2040. The structure is 106 ft (32.3 m) long and 85 ft wide.

Location

Open in Google Maps
CarriesInterstate 280 SB
CrossesRancho Pulgas Vista Road
Location04-SM-280-9.41
RouteInterstate 280
CountySan Mateo County
StateCalifornia
Coordinates37.49841, -122.31592
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating103.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length106 ft (32.3 m)
Longest span104 ft (31.6 m)
Deck width85 ft (25.8 m)
Roadway width81 ft (24.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51,500 (2009)
Projected traffic69,524 by 2040
Trucks0%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 Interstate 280 SB over Rancho Pulgas Vista Road built?

It was built in 1973, making it 52 years old in 2025.

What condition is Interstate 280 SB over Rancho Pulgas Vista 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 October 2023.

How much traffic does Interstate 280 SB over Rancho Pulgas Vista Road carry?

About 51,500 vehicles per day (2009 count).

How long is Interstate 280 SB over Rancho Pulgas Vista Road?

The structure is 106 ft (32.3 m) long with a longest span of 104 ft (31.6 m) and a deck 85 ft wide.

Who owns Interstate 280 SB over Rancho Pulgas Vista Road?

It is owned by the State Highway Agency.