US Bridges

Route 105 & Lrt over Route 405 Conns Streets

Fair

Los Angeles County, California · 07-LA-105-R2.00-HAW · Structure no. 53 2400

Built
1991
34 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
2,369 ft
18 main spans
Daily traffic
160,000
2022 count
Owner
State
State Highway Agency

About this bridge

Route 105 & Lrt over Route 405 Conns Streets is a prestressed concrete continuous box beam or girders - multiple carrying Route 105 & Lrt over Route 405 Conns Streets in Los Angeles County, California. It was built in 1991, so it is 34 years old, younger 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 160,000 vehicles a day, roughly 4% of them trucks, projected to reach 284,568 by 2042. The structure is 2,369 ft (722.1 m) long and 191 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesRoute 105 & Lrt
CrossesRoute 405 Conns Streets
Location07-LA-105-R2.00-HAW
RouteInterstate 105
Coordinates33.92969, -118.3703
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans18
Design loadHS 20 + Mod
Structure length2,369 ft (722.1 m)
Longest span172 ft (52.4 m)
Deck width191 ft (58.3 m)
Roadway width142 ft (43.4 m)
Vertical clearance over deck21 ft (6.3 m)

Traffic and service

Average daily traffic160,000 (2022)
Projected traffic284,568 by 2042
Trucks4%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway and railroad
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 statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Route 105 & Lrt over Route 405 Conns Streets built?

It was built in 1991, making it 34 years old in 2025.

What condition is Route 105 & Lrt over Route 405 Conns Streets 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 April 2024.

How much traffic does Route 105 & Lrt over Route 405 Conns Streets carry?

About 160,000 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Route 105 & Lrt over Route 405 Conns Streets?

The structure is 2,369 ft (722.1 m) long with a longest span of 172 ft (52.4 m) and a deck 191 ft wide.

Who owns Route 105 & Lrt over Route 405 Conns Streets?

It is owned by the State Highway Agency.