US Bridges

I-5/SR170 over I-5

Good

Los Angeles County, California · 07-LA-170-R20.34-LA · Structure no. 53 2976G

Built
2015
10 years old
Condition
Good
inspected March 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
2,355 ft
11 main spans
Daily traffic
92,000
2017 count
Owner
State
State Highway Agency

About this bridge

I-5/SR170 over I-5 is a concrete continuous box beam or girders - multiple carrying I-5/SR170 over I-5 in Los Angeles County, California. It was built in 2015, so it is 10 years old, younger 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 92,000 vehicles a day, roughly 5% of them trucks, projected to reach 96,687 by 2043. The structure is 2,355 ft (717.8 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-5/SR170
CrossesI-5
Location07-LA-170-R20.34-LA
RouteState Highway 170
Coordinates34.23018, -118.40943
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionMarch 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 alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20
Structure length2,355 ft (717.8 m)
Longest span224 ft (68.4 m)
Deck width58 ft (17.7 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic92,000 (2017)
Projected traffic96,687 by 2043
Trucks5%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 I-5/SR170 over I-5 built?

It was built in 2015, making it 10 years old in 2025.

What condition is I-5/SR170 over I-5 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 March 2024.

How much traffic does I-5/SR170 over I-5 carry?

About 92,000 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is I-5/SR170 over I-5?

The structure is 2,355 ft (717.8 m) long with a longest span of 224 ft (68.4 m) and a deck 58 ft wide.

Who owns I-5/SR170 over I-5?

It is owned by the State Highway Agency.