US Bridges

I-5 over N405-N5 Connector Ramp

Good

Los Angeles County, California · 07-LA-005-41.57-LA · Structure no. 53 1133

Built
1963
62 years old
Condition
Good
inspected January 2025
Type
Box Beam or Girders - Multiple
Concrete
Length
215 ft
1 main span
Daily traffic
156,373
2018 count
Owner
State
State Highway Agency

About this bridge

I-5 over N405-N5 Connector Ramp is a concrete box beam or girders - multiple carrying I-5 over N405-N5 Connector Ramp in Los Angeles County, California. It was built in 1963, so it is 62 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 156,373 vehicles a day, roughly 10% of them trucks, projected to reach 210,335 by 2043. The structure is 215 ft (65.4 m) long and 116 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesI-5
CrossesN405-N5 Connector Ramp
Location07-LA-005-41.57-LA
RouteInterstate 5
CountyLos Angeles County
StateCalifornia
Coordinates34.29153, -118.46779
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 inspectionJanuary 2025
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 alignment9: Superior to present desirable criteria
Operating rating110 US tons
Inventory rating102.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length215 ft (65.4 m)
Longest span207 ft (63.1 m)
Deck width116 ft (35.5 m)
Roadway width112 ft (34.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic156,373 (2018)
Projected traffic210,335 by 2043
Trucks10%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 I-5 over N405-N5 Connector Ramp built?

It was built in 1963, making it 62 years old in 2025.

What condition is I-5 over N405-N5 Connector Ramp 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 January 2025.

How much traffic does I-5 over N405-N5 Connector Ramp carry?

About 156,373 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is I-5 over N405-N5 Connector Ramp?

The structure is 215 ft (65.4 m) long with a longest span of 207 ft (63.1 m) and a deck 116 ft wide.

Who owns I-5 over N405-N5 Connector Ramp?

It is owned by the State Highway Agency.