US Bridges

405-55 Hov Lanes over I 405 NB SR 55 NB

Good

Orange County, California · 12-ORA-405-8.48-SA · Structure no. 55 0952E

Built
2004
21 years old
Condition
Good
inspected February 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
2,467 ft
11 main spans
Daily traffic
5,000
2014 count
Owner
State
State Highway Agency

About this bridge

405-55 Hov Lanes over I 405 NB SR 55 NB is a prestressed concrete continuous box beam or girders - multiple carrying 405-55 Hov Lanes over I 405 NB SR 55 NB in Orange County, California. It was built in 2004, so it is 21 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 5,000 vehicles a day, roughly 1% of them trucks, projected to reach 10,442 by 2045. The structure is 2,467 ft (752 m) long and 49 ft wide.

Carries405-55 Hov Lanes
CrossesI 405 NB SR 55 NB
Location12-ORA-405-8.48-SA
RouteInterstate 405
Coordinates33.68622, -117.86481
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 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20 + Mod
Structure length2,467 ft (752 m)
Longest span240 ft (73 m)
Deck width49 ft (14.9 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deck18 ft (5.4 m)

Traffic and service

Average daily traffic5,000 (2014)
Projected traffic10,442 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 405-55 Hov Lanes over I 405 NB SR 55 NB built?

It was built in 2004, making it 21 years old in 2025.

What condition is 405-55 Hov Lanes over I 405 NB SR 55 NB 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 2025.

How much traffic does 405-55 Hov Lanes over I 405 NB SR 55 NB carry?

About 5,000 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is 405-55 Hov Lanes over I 405 NB SR 55 NB?

The structure is 2,467 ft (752 m) long with a longest span of 240 ft (73 m) and a deck 49 ft wide.

Who owns 405-55 Hov Lanes over I 405 NB SR 55 NB?

It is owned by the State Highway Agency.