US Bridges

Interstate 10 over Interstate 405

Fair

Los Angeles County, California · 07-LA-010-R5.43-LA · Structure no. 53 1628

Built
1963
62 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
246 ft
4 main spans
Daily traffic
237,000
2018 count
Owner
State
State Highway Agency

About this bridge

Interstate 10 over Interstate 405 is a concrete continuous box beam or girders - multiple carrying Interstate 10 over Interstate 405 in Los Angeles County, California. It was built in 1963, so it is 62 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 237,000 vehicles a day, roughly 2% of them trucks, projected to reach 246,495 by 2042. The structure is 246 ft (75 m) long and 117 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 10
CrossesInterstate 405
Location07-LA-010-R5.43-LA
RouteInterstate 10
Coordinates34.03108, -118.43381
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment9: Superior to present desirable criteria
Operating rating41.4 US tons
Inventory rating31.7 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length246 ft (75 m)
Longest span86 ft (26.1 m)
Deck width117 ft (35.6 m)
Roadway width112 ft (34.1 m)
Vertical clearance over deck15 ft (4.6 m)

Traffic and service

Average daily traffic237,000 (2018)
Projected traffic246,495 by 2042
Trucks2%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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 10 over Interstate 405 built?

It was built in 1963, making it 62 years old in 2025.

What condition is Interstate 10 over Interstate 405 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 May 2024.

How much traffic does Interstate 10 over Interstate 405 carry?

About 237,000 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is Interstate 10 over Interstate 405?

The structure is 246 ft (75 m) long with a longest span of 86 ft (26.1 m) and a deck 117 ft wide.

Who owns Interstate 10 over Interstate 405?

It is owned by the State Highway Agency.