US Bridges

Interstate 405 over S110-S405 Connector Ramp

Good

Los Angeles County, California · 07-LA-405-13.06-LA · Structure no. 53 1142

Built
1961
64 years old
Condition
Good
inspected May 2024
Type
Frame
Concrete
Length
77 ft
1 main span
Daily traffic
235,500
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 405 over S110-S405 Connector Ramp is a concrete frame carrying Interstate 405 over S110-S405 Connector Ramp 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 235,500 vehicles a day, roughly 5% of them trucks, projected to reach 324,375 by 2046. The structure is 77 ft (23.5 m) long and 139 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesInterstate 405
CrossesS110-S405 Connector Ramp
Location07-LA-405-13.06-LA
RouteInterstate 405
CountyLos Angeles County
StateCalifornia
Coordinates33.85793, -118.28613
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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating97.6 US tons
Inventory rating59 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length77 ft (23.5 m)
Longest span77 ft (23.5 m)
Deck width139 ft (42.3 m)
Roadway width134 ft (40.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic235,500 (2019)
Projected traffic324,375 by 2046
Trucks5%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 Interstate 405 over S110-S405 Connector Ramp built?

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

What condition is Interstate 405 over S110-S405 Connector Ramp 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 2024.

How much traffic does Interstate 405 over S110-S405 Connector Ramp carry?

About 235,500 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is Interstate 405 over S110-S405 Connector Ramp?

The structure is 77 ft (23.5 m) long with a longest span of 77 ft (23.5 m) and a deck 139 ft wide.

Who owns Interstate 405 over S110-S405 Connector Ramp?

It is owned by the State Highway Agency.