US Bridges

Interstate 605 over Studebaker Road

Fair

Los Angeles County, California · 07-LA-605-R4.39-CRTS · Structure no. 53 1733

Built
1966
59 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
255 ft
4 main spans
Daily traffic
245,000
2021 count
Owner
State
State Highway Agency

About this bridge

Interstate 605 over Studebaker Road is a concrete continuous box beam or girders - multiple carrying Interstate 605 over Studebaker Road in Los Angeles County, California. It was built in 1966, so it is 59 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 245,000 vehicles a day, roughly 5% of them trucks, projected to reach 257,261 by 2042. The structure is 255 ft (77.6 m) long and 160 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesInterstate 605
CrossesStudebaker Road
Location07-LA-605-R4.39-CRTS
RouteInterstate 605
Coordinates33.86763, -118.09905
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 inspectionJune 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 alignment9: Superior to present desirable criteria
Operating rating49.3 US tons
Inventory rating38.3 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length255 ft (77.6 m)
Longest span74 ft (22.7 m)
Deck width160 ft (48.8 m)
Roadway width156 ft (47.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic245,000 (2021)
Projected traffic257,261 by 2042
Trucks5%
Lanes on structure12
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 Interstate 605 over Studebaker Road built?

It was built in 1966, making it 59 years old in 2025.

What condition is Interstate 605 over Studebaker Road 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 June 2023.

How much traffic does Interstate 605 over Studebaker Road carry?

About 245,000 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Interstate 605 over Studebaker Road?

The structure is 255 ft (77.6 m) long with a longest span of 74 ft (22.7 m) and a deck 160 ft wide.

Who owns Interstate 605 over Studebaker Road?

It is owned by the State Highway Agency.