US Bridges

Interstate 605 over Foster Road

Good

Los Angeles County, California · 07-LA-605-R7.34-NRW · Structure no. 53 1650

Built
1966
59 years old, rebuilt 1993
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
228 ft
5 main spans
Daily traffic
297,000
2021 count
Owner
State
State Highway Agency

About this bridge

Interstate 605 over Foster Road is a concrete continuous box beam or girders - multiple carrying Interstate 605 over Foster Road in Los Angeles County, California. It was built in 1966 and reconstructed in 1993, 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 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 297,000 vehicles a day, roughly 6% of them trucks, projected to reach 305,454 by 2042. The structure is 228 ft (69.5 m) long and 164 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesInterstate 605
CrossesFoster Road
Location07-LA-605-R7.34-NRW
RouteInterstate 605
Coordinates33.90953, -118.10477
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to 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 rating40 US tons
Inventory rating26.8 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length228 ft (69.5 m)
Longest span76 ft (23.2 m)
Deck width164 ft (50 m)
Roadway width158 ft (48.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic297,000 (2021)
Projected traffic305,454 by 2042
Trucks6%
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 Foster Road built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1993.

What condition is Interstate 605 over Foster Road 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 August 2023.

How much traffic does Interstate 605 over Foster Road carry?

About 297,000 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is Interstate 605 over Foster Road?

The structure is 228 ft (69.5 m) long with a longest span of 76 ft (23.2 m) and a deck 164 ft wide.

Who owns Interstate 605 over Foster Road?

It is owned by the State Highway Agency.