US Bridges

Interstate 405 over Roscoe Blvd

Good

Los Angeles County, California · 07-LA-405-43.76-LA · Structure no. 53 1409

Built
1963
62 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
187 ft
1 main span
Daily traffic
216,000
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 405 over Roscoe Blvd is a concrete box beam or girders - multiple carrying Interstate 405 over Roscoe 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 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 216,000 vehicles a day, roughly 4% of them trucks, projected to reach 346,255 by 2040. The structure is 187 ft (57 m) long and 141 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 405
CrossesRoscoe Blvd
Location07-LA-405-43.76-LA
RouteInterstate 405
Coordinates34.22114, -118.47299
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 inspectionOctober 2023
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 alignment8: Equal to present desirable criteria
Operating rating82.3 US tons
Inventory rating49.9 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length187 ft (57 m)
Longest span103 ft (31.4 m)
Deck width141 ft (43 m)
Roadway width136 ft (41.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic216,000 (2019)
Projected traffic346,255 by 2040
Trucks4%
Lanes on structure10
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 Roscoe Blvd built?

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

What condition is Interstate 405 over Roscoe 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 October 2023.

How much traffic does Interstate 405 over Roscoe Blvd carry?

About 216,000 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is Interstate 405 over Roscoe Blvd?

The structure is 187 ft (57 m) long with a longest span of 103 ft (31.4 m) and a deck 141 ft wide.

Who owns Interstate 405 over Roscoe Blvd?

It is owned by the State Highway Agency.