US Bridges

State Route 1 over Classification RD

Fair

Los Angeles County, California · 07-LA-001-8.43-LA · Structure no. 53 0399

Built
1948
77 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
323 ft
6 main spans
Daily traffic
26,500
2023 count
Owner
State
State Highway Agency

About this bridge

State Route 1 over Classification RD is a steel stringer/multi-beam or girder carrying State Route 1 over Classification RD in Los Angeles County, California. It was built in 1948, so it is 77 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 6 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 26,500 vehicles a day, roughly 11% of them trucks, projected to reach 36,500 by 2043. The structure is 323 ft (98.5 m) long and 91 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesState Route 1
CrossesClassification RD
Location07-LA-001-8.43-LA
RouteState Highway 1
CountyLos Angeles County
StateCalifornia
Coordinates33.79039, -118.22729
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length323 ft (98.5 m)
Longest span61 ft (18.6 m)
Deck width91 ft (27.6 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,500 (2023)
Projected traffic36,500 by 2043
Trucks11%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 State Route 1 over Classification RD built?

It was built in 1948, making it 77 years old in 2025.

What condition is State Route 1 over Classification RD 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 December 2023.

How much traffic does State Route 1 over Classification RD carry?

About 26,500 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is State Route 1 over Classification RD?

The structure is 323 ft (98.5 m) long with a longest span of 61 ft (18.6 m) and a deck 91 ft wide.

Who owns State Route 1 over Classification RD?

It is owned by the State Highway Agency.