US Bridges

NB405 On-Ramp over Sepulveda Blvd

Good

Los Angeles County, California · 07-LA-405-32.94-LA · Structure no. 53 3091S

Built
2013
12 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
235 ft
2 main spans
Daily traffic
10,006
2021 count
Owner
State
State Highway Agency

About this bridge

NB405 On-Ramp over Sepulveda Blvd is a concrete continuous box beam or girders - multiple carrying NB405 On-Ramp over Sepulveda Blvd in Los Angeles County, California. It was built in 2013, so it is 12 years old, younger 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 10,006 vehicles a day, roughly 2% of them trucks, projected to reach 23,278 by 2045. The structure is 235 ft (71.5 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNB405 On-Ramp
CrossesSepulveda Blvd
Location07-LA-405-32.94-LA
RouteInterstate 405
CountyLos Angeles County
StateCalifornia
Coordinates34.07254, -118.46542
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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length235 ft (71.5 m)
Longest span136 ft (41.5 m)
Deck width45 ft (13.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,006 (2021)
Projected traffic23,278 by 2045
Trucks2%
Lanes on structure2
Traffic directionOne-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 NB405 On-Ramp over Sepulveda Blvd built?

It was built in 2013, making it 12 years old in 2025.

What condition is NB405 On-Ramp over Sepulveda 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 May 2023.

How much traffic does NB405 On-Ramp over Sepulveda Blvd carry?

About 10,006 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is NB405 On-Ramp over Sepulveda Blvd?

The structure is 235 ft (71.5 m) long with a longest span of 136 ft (41.5 m) and a deck 45 ft wide.

Who owns NB405 On-Ramp over Sepulveda Blvd?

It is owned by the State Highway Agency.