US Bridges

I-5 Sup Route over Interstate 5

Good

Los Angeles County, California · 07-LA-005S-25.78-LA · Structure no. 53 1073E

Built
1957
68 years old
Condition
Good
inspected February 2022
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
157 ft
2 main spans
Daily traffic
25,502
2012 count
Owner
State
State Highway Agency

About this bridge

I-5 Sup Route over Interstate 5 is a concrete continuous box beam or girders - multiple carrying I-5 Sup Route over Interstate 5 in Los Angeles County, California. It was built in 1957, so it is 68 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 25,502 vehicles a day, roughly 2% of them trucks, projected to reach 33,372 by 2044. The structure is 157 ft (47.8 m) long and 67 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesI-5 Sup Route
CrossesInterstate 5
Location07-LA-005S-25.78-LA
RouteInterstate 5
Coordinates34.14074, -118.27791
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 inspectionFebruary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating41.8 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length157 ft (47.8 m)
Longest span83 ft (25.3 m)
Deck width67 ft (20.5 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,502 (2012)
Projected traffic33,372 by 2044
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 Sup Route over Interstate 5 built?

It was built in 1957, making it 68 years old in 2025.

What condition is I-5 Sup Route over Interstate 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 February 2022.

How much traffic does I-5 Sup Route over Interstate 5 carry?

About 25,502 vehicles per day (2012 count), of which roughly 2% are trucks.

How long is I-5 Sup Route over Interstate 5?

The structure is 157 ft (47.8 m) long with a longest span of 83 ft (25.3 m) and a deck 67 ft wide.

Who owns I-5 Sup Route over Interstate 5?

It is owned by the State Highway Agency.