US Bridges

State Route 91 EB over 91-55 Fast Track

Good

Orange County, California · 12-ORA-091-R9.19-ANA · Structure no. 55 0493R

Built
1970
55 years old
Condition
Good
inspected August 2024
Type
Box Beam or Girders - Multiple
Concrete
Length
135 ft
1 main span
Daily traffic
159,000
2020 count
Owner
State
State Highway Agency

About this bridge

State Route 91 EB over 91-55 Fast Track is a concrete box beam or girders - multiple carrying State Route 91 EB over 91-55 Fast Track in Orange County, California. It was built in 1970, so it is 55 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 159,000 vehicles a day, roughly 5% of them trucks, projected to reach 184,000 by 2042. The structure is 135 ft (41.1 m) long and 53 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 91 EB
Crosses91-55 Fast Track
Location12-ORA-091-R9.19-ANA
RouteState Highway 91
Coordinates33.84407, -117.82703
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 inspectionAugust 2024
Inspection intervalevery 24 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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length135 ft (41.1 m)
Longest span129 ft (39.3 m)
Deck width53 ft (16.1 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic159,000 (2020)
Projected traffic184,000 by 2042
Trucks5%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 State Route 91 EB over 91-55 Fast Track built?

It was built in 1970, making it 55 years old in 2025.

What condition is State Route 91 EB over 91-55 Fast Track 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 August 2024.

How much traffic does State Route 91 EB over 91-55 Fast Track carry?

About 159,000 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is State Route 91 EB over 91-55 Fast Track?

The structure is 135 ft (41.1 m) long with a longest span of 129 ft (39.3 m) and a deck 53 ft wide.

Who owns State Route 91 EB over 91-55 Fast Track?

It is owned by the State Highway Agency.