US Bridges

N405-W90 Connector over E90-N405 Conn I 405 Rmps

Fair

Los Angeles County, California · 07-LA-405-25.99-CLC · Structure no. 53 1838G

Built
1967
58 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
944 ft
2 main spans
Daily traffic
19,302
2019 count
Owner
State
State Highway Agency

About this bridge

N405-W90 Connector over E90-N405 Conn I 405 Rmps is a prestressed concrete continuous stringer/multi-beam or girder carrying N405-W90 Connector over E90-N405 Conn I 405 Rmps in Los Angeles County, California. It was built in 1967, so it is 58 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 19,302 vehicles a day, roughly 2% of them trucks, projected to reach 22,282 by 2045. The structure is 944 ft (287.7 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN405-W90 Connector
CrossesE90-N405 Conn I 405 Rmps
Location07-LA-405-25.99-CLC
RouteInterstate 405
CountyLos Angeles County
StateCalifornia
Coordinates33.98818, -118.40126
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 geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating76.9 US tons
Inventory rating35.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+8 approach)
Design loadHS 20
Structure length944 ft (287.7 m)
Longest span110 ft (33.5 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deck15 ft (4.5 m)

Traffic and service

Average daily traffic19,302 (2019)
Projected traffic22,282 by 2045
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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 N405-W90 Connector over E90-N405 Conn I 405 Rmps built?

It was built in 1967, making it 58 years old in 2025.

What condition is N405-W90 Connector over E90-N405 Conn I 405 Rmps 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 N405-W90 Connector over E90-N405 Conn I 405 Rmps carry?

About 19,302 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is N405-W90 Connector over E90-N405 Conn I 405 Rmps?

The structure is 944 ft (287.7 m) long with a longest span of 110 ft (33.5 m) and a deck 40 ft wide.

Who owns N405-W90 Connector over E90-N405 Conn I 405 Rmps?

It is owned by the State Highway Agency.