US Bridges

Interstate 405 over Ventura Blvd

Fair

Los Angeles County, California · 07-LA-405-39.00-LA · Structure no. 53 0741

Built
1956
69 years old, rebuilt 2008
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
129 ft
1 main span
Daily traffic
278,000
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 405 over Ventura Blvd is a steel stringer/multi-beam or girder carrying Interstate 405 over Ventura Blvd in Los Angeles County, California. It was built in 1956 and reconstructed in 2008, so it is 69 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 278,000 vehicles a day, roughly 4% of them trucks, projected to reach 411,949 by 2040. The structure is 129 ft (39.4 m) long and 188 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesInterstate 405
CrossesVentura Blvd
Location07-LA-405-39.00-LA
RouteInterstate 405
CountyLos Angeles County
StateCalifornia
Coordinates34.15392, -118.46775
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 inspectionJune 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 alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length129 ft (39.4 m)
Longest span129 ft (39.4 m)
Deck width188 ft (57.2 m)
Roadway width182 ft (55.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic278,000 (2019)
Projected traffic411,949 by 2040
Trucks4%
Lanes on structure12
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 Ventura Blvd built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 2008.

What condition is Interstate 405 over Ventura 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 June 2023.

How much traffic does Interstate 405 over Ventura Blvd carry?

About 278,000 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is Interstate 405 over Ventura Blvd?

The structure is 129 ft (39.4 m) long with a longest span of 129 ft (39.4 m) and a deck 188 ft wide.

Who owns Interstate 405 over Ventura Blvd?

It is owned by the State Highway Agency.