US Bridges

Interstate 405 over Jefferson Blvd

Fair

Los Angeles County, California · 07-LA-405-25.93-LA · Structure no. 53 1255

Built
1963
62 years old
Condition
Fair
inspected February 2025
Type
Tee Beam
Concrete Continuous
Length
163 ft
4 main spans
Daily traffic
284,000
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 405 over Jefferson Blvd is a concrete continuous tee beam carrying Interstate 405 over Jefferson 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 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 284,000 vehicles a day, roughly 4% of them trucks, projected to reach 349,130 by 2045. The structure is 163 ft (49.7 m) long and 144 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesInterstate 405
CrossesJefferson Blvd
Location07-LA-405-25.93-LA
RouteInterstate 405
CountyLos Angeles County
StateCalifornia
Coordinates33.98765, -118.39876
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 inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment9: Superior to present desirable criteria
Operating rating41.1 US tons
Inventory rating30.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length163 ft (49.7 m)
Longest span53 ft (16.2 m)
Deck width144 ft (44 m)
Roadway width138 ft (42.1 m)
Vertical clearance over deck16 ft (5 m)

Traffic and service

Average daily traffic284,000 (2019)
Projected traffic349,130 by 2045
Trucks4%
Lanes on structure8
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 Jefferson Blvd built?

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

What condition is Interstate 405 over Jefferson 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 February 2025.

How much traffic does Interstate 405 over Jefferson Blvd carry?

About 284,000 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is Interstate 405 over Jefferson Blvd?

The structure is 163 ft (49.7 m) long with a longest span of 53 ft (16.2 m) and a deck 144 ft wide.

Who owns Interstate 405 over Jefferson Blvd?

It is owned by the State Highway Agency.