US Bridges

Interstate 405 over Washington Blvd

Good

Los Angeles County, California · 07-LA-405-27.45-CLC · Structure no. 53 1260

Built
1960
65 years old, rebuilt 2009
Condition
Good
inspected April 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
128 ft
1 main span
Daily traffic
294,000
2014 count
Owner
State
State Highway Agency

About this bridge

Interstate 405 over Washington Blvd is a concrete box beam or girders - multiple carrying Interstate 405 over Washington Blvd in Los Angeles County, California. It was built in 1960 and reconstructed in 2009, so it is 65 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 294,000 vehicles a day, roughly 4% of them trucks, projected to reach 414,167 by 2043. The structure is 128 ft (39 m) long and 224 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesInterstate 405
CrossesWashington Blvd
Location07-LA-405-27.45-CLC
RouteInterstate 405
Coordinates34.00625, -118.41331
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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating110 US tons
Inventory rating79.3 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length128 ft (39 m)
Longest span123 ft (37.5 m)
Deck width224 ft (68.2 m)
Roadway width213 ft (65 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic294,000 (2014)
Projected traffic414,167 by 2043
Trucks4%
Lanes on structure14
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 Washington Blvd built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2009.

What condition is Interstate 405 over Washington 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 April 2023.

How much traffic does Interstate 405 over Washington Blvd carry?

About 294,000 vehicles per day (2014 count), of which roughly 4% are trucks.

How long is Interstate 405 over Washington Blvd?

The structure is 128 ft (39 m) long with a longest span of 123 ft (37.5 m) and a deck 224 ft wide.

Who owns Interstate 405 over Washington Blvd?

It is owned by the State Highway Agency.