US Bridges

Interstate 405 over Olympic Blvd

Good

Los Angeles County, California · 07-LA-405-30.18-LA · Structure no. 53 0706

Built
1959
66 years old, rebuilt 2013
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
119 ft
1 main span
Daily traffic
296,000
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 405 over Olympic Blvd is a concrete box beam or girders - multiple carrying Interstate 405 over Olympic Blvd in Los Angeles County, California. It was built in 1959 and reconstructed in 2013, so it is 66 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 296,000 vehicles a day, roughly 4% of them trucks, projected to reach 424,388 by 2040. The structure is 119 ft (36.3 m) long and 214 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesInterstate 405
CrossesOlympic Blvd
Location07-LA-405-30.18-LA
RouteInterstate 405
Coordinates34.03911, -118.43937
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
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 alignment8: Equal to present desirable criteria
Operating rating57.5 US tons
Inventory rating41.8 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length119 ft (36.3 m)
Longest span110 ft (33.5 m)
Deck width214 ft (65.1 m)
Roadway width143 ft (43.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic296,000 (2019)
Projected traffic424,388 by 2040
Trucks4%
Lanes on structure11
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
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 405 over Olympic Blvd built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2013.

What condition is Interstate 405 over Olympic Blvd in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does Interstate 405 over Olympic Blvd carry?

About 296,000 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is Interstate 405 over Olympic Blvd?

The structure is 119 ft (36.3 m) long with a longest span of 110 ft (33.5 m) and a deck 214 ft wide.

Who owns Interstate 405 over Olympic Blvd?

It is owned by the State Highway Agency.