US Bridges

N55-W91 Connector over SR 55 & 55-91 Fast-Track

Fair

Orange County, California · 12-ORA-055-R17.67-ANA · Structure no. 55 0321G

Built
1961
64 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
389 ft
4 main spans
Daily traffic
23,737
2022 count
Owner
State
State Highway Agency

About this bridge

N55-W91 Connector over SR 55 & 55-91 Fast-Track is a concrete continuous box beam or girders - multiple carrying N55-W91 Connector over SR 55 & 55-91 Fast-Track in Orange County, California. It was built in 1961, so it is 64 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 23,737 vehicles a day, roughly 3% of them trucks, projected to reach 35,000 by 2044. The structure is 389 ft (118.6 m) long and 34 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

CarriesN55-W91 Connector
CrossesSR 55 & 55-91 Fast-Track
Location12-ORA-055-R17.67-ANA
RouteState Highway 55
Coordinates33.84279, -117.82927
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.4 US tons
Inventory rating31.7 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length389 ft (118.6 m)
Longest span112 ft (34.1 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,737 (2022)
Projected traffic35,000 by 2044
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was N55-W91 Connector over SR 55 & 55-91 Fast-Track built?

It was built in 1961, making it 64 years old in 2025.

What condition is N55-W91 Connector over SR 55 & 55-91 Fast-Track in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.

How much traffic does N55-W91 Connector over SR 55 & 55-91 Fast-Track carry?

About 23,737 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is N55-W91 Connector over SR 55 & 55-91 Fast-Track?

The structure is 389 ft (118.6 m) long with a longest span of 112 ft (34.1 m) and a deck 34 ft wide.

Who owns N55-W91 Connector over SR 55 & 55-91 Fast-Track?

It is owned by the State Highway Agency.