US Bridges

Interstate 280 NB over Edgewood Road

Fair

San Mateo County, California · 04-SM-280-6.65 · Structure no. 35 0250R

Built
1973
52 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
201 ft
2 main spans
Daily traffic
55,500
2009 count
Owner
State
State Highway Agency

About this bridge

Interstate 280 NB over Edgewood Road is a concrete continuous box beam or girders - multiple carrying Interstate 280 NB over Edgewood 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 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 55,500 vehicles a day, roughly 3% of them trucks, projected to reach 169,818 by 2040. The structure is 201 ft (61.2 m) long and 70 ft wide.

Location

Open in Google Maps
CarriesInterstate 280 NB
CrossesEdgewood Road
Location04-SM-280-6.65
RouteInterstate 280
CountySan Mateo County
StateCalifornia
Coordinates37.46841, -122.29201
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.7 US tons
Inventory rating62.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length201 ft (61.2 m)
Longest span100 ft (30.6 m)
Deck width70 ft (21.2 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55,500 (2009)
Projected traffic169,818 by 2040
Trucks3%
Lanes on structure4
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 NB over Edgewood Road built?

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

What condition is Interstate 280 NB over Edgewood 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 NB over Edgewood Road carry?

About 55,500 vehicles per day (2009 count), of which roughly 3% are trucks.

How long is Interstate 280 NB over Edgewood Road?

The structure is 201 ft (61.2 m) long with a longest span of 100 ft (30.6 m) and a deck 70 ft wide.

Who owns Interstate 280 NB over Edgewood Road?

It is owned by the State Highway Agency.