US Bridges

W Florence Avenue over I-405 & NB Ramps

Good

Los Angeles County, California · 07-LA-405-23.50-ING · Structure no. 53 1248

Built
1961
64 years old
Condition
Good
inspected January 2025
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
268 ft
4 main spans
Daily traffic
9,500
2019 count
Owner
State
State Highway Agency

About this bridge

W Florence Avenue over I-405 & NB Ramps is a concrete continuous box beam or girders - multiple carrying W Florence Avenue over I-405 & NB Ramps in Los Angeles County, California. It was built in 1961, so it is 64 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 9,500 vehicles a day, roughly 2% of them trucks, projected to reach 14,183 by 2047. The structure is 268 ft (81.7 m) long and 67 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesW Florence Avenue
CrossesI-405 & NB Ramps
Location07-LA-405-23.50-ING
RouteCity Street 0L120
Coordinates33.96344, -118.37021
Functional classUrban Local

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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment9: Superior to present desirable criteria
Operating rating41.1 US tons
Inventory rating31.7 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length268 ft (81.7 m)
Longest span86 ft (26.2 m)
Deck width67 ft (20.4 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,500 (2019)
Projected traffic14,183 by 2047
Trucks2%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 W Florence Avenue over I-405 & NB Ramps built?

It was built in 1961, making it 64 years old in 2025.

What condition is W Florence Avenue over I-405 & NB Ramps 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 January 2025.

How much traffic does W Florence Avenue over I-405 & NB Ramps carry?

About 9,500 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is W Florence Avenue over I-405 & NB Ramps?

The structure is 268 ft (81.7 m) long with a longest span of 86 ft (26.2 m) and a deck 67 ft wide.

Who owns W Florence Avenue over I-405 & NB Ramps?

It is owned by the State Highway Agency.