US Bridges

Interstate 405 over Clark Ave

Good

Los Angeles County, California · 07-LA-405-2.76-LBCH · Structure no. 53 1195

Built
1963
62 years old
Condition
Good
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
174 ft
2 main spans
Daily traffic
255,000
2021 count
Owner
State
State Highway Agency

About this bridge

Interstate 405 over Clark Ave is a prestressed concrete stringer/multi-beam or girder carrying Interstate 405 over Clark Ave 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 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 255,000 vehicles a day, roughly 5% of them trucks, projected to reach 323,577 by 2041. The structure is 174 ft (53 m) long and 148 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 405
CrossesClark Ave
Location07-LA-405-2.76-LBCH
RouteInterstate 405
Coordinates33.80303, -118.13371
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment9: Superior to present desirable criteria
Operating rating43.2 US tons
Inventory rating28.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHL 93
Structure length174 ft (53 m)
Longest span53 ft (16.2 m)
Deck width148 ft (45.1 m)
Roadway width140 ft (42.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic255,000 (2021)
Projected traffic323,577 by 2041
Trucks5%
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 Clark Ave built?

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

What condition is Interstate 405 over Clark Ave 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 December 2024.

How much traffic does Interstate 405 over Clark Ave carry?

About 255,000 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Interstate 405 over Clark Ave?

The structure is 174 ft (53 m) long with a longest span of 53 ft (16.2 m) and a deck 148 ft wide.

Who owns Interstate 405 over Clark Ave?

It is owned by the State Highway Agency.