US Bridges

Interstate 405 over Lennox Blvd

Fair

Los Angeles County, California · 07-LA-405-21.74-LA · Structure no. 53 1242

Built
1963
62 years old
Condition
Fair
inspected January 2025
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
145 ft
3 main spans
Daily traffic
272,600
2022 count
Owner
State
State Highway Agency

About this bridge

Interstate 405 over Lennox Blvd is a concrete continuous box beam or girders - multiple carrying Interstate 405 over Lennox Blvd 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 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 272,600 vehicles a day, roughly 5% of them trucks, projected to reach 306,380 by 2044. The structure is 145 ft (44.2 m) long and 229 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesInterstate 405
CrossesLennox Blvd
Location07-LA-405-21.74-LA
RouteInterstate 405
Coordinates33.93822, -118.36804
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 inspectionJanuary 2025
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 alignment8: Equal to present desirable criteria
Operating rating110 US tons
Inventory rating59 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length145 ft (44.2 m)
Longest span82 ft (25 m)
Deck width229 ft (69.8 m)
Roadway width197 ft (60 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic272,600 (2022)
Projected traffic306,380 by 2044
Trucks5%
Lanes on structure12
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 Lennox Blvd built?

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

What condition is Interstate 405 over Lennox Blvd 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 January 2025.

How much traffic does Interstate 405 over Lennox Blvd carry?

About 272,600 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Interstate 405 over Lennox Blvd?

The structure is 145 ft (44.2 m) long with a longest span of 82 ft (25 m) and a deck 229 ft wide.

Who owns Interstate 405 over Lennox Blvd?

It is owned by the State Highway Agency.