STATE ROUTE 1
Carrying STATE ROUTE 1 over TRANCAS CREEK
07-LA-001-56.71, Los Angeles, California
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: STATE ROUTE 1
The STATE ROUTE 1 bridge in Los Angeles, California carries STATE ROUTE 1 over TRANCAS CREEK. It was built in 1927, making it 99 years old today. It was last reconstructed in 1938, extending its service life. The structure is built primarily of concrete and spans 3 sections, stretching 29.6 meters (97 feet) end to end. Daily traffic averages 17,100 vehicles, placing it in the heavily-trafficked tier of California bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 2/9. The weakest component sits in critical condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules. Its NBI inventory load rating is 27.5 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How STATE ROUTE 1 compares
Live comparison across California.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1927
- Last Reconstructed
- 1938
- Material
- Concrete
- Number of Spans
- 3
- Structure Length
- 29.6 m (97 ft)
- Deck Width
- 25.6 m (84 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 17,100 vehicles/day
- Structure Number
- 53 0027
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 7/9, the deck (driving surface) is in good shape and shows no significant wear.
- • The superstructure (beams and supports above the deck) rates good at 7/9, with no significant deterioration on file.
- • At 2/9, the substructure (piers and abutments) is in critical shape, with severe wear requiring urgent action.
How to read this record
STATE ROUTE 1 is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare STATE ROUTE 1 against other structures in Los Angeles and across California. California bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for STATE ROUTE 1?
STATE ROUTE 1 in Los Angeles, California has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 2/9 on the FHWA's 0–9 scale.
How often is STATE ROUTE 1 inspected?
STATE ROUTE 1's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 17,100 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. STATE ROUTE 1 is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for STATE ROUTE 1?
STATE ROUTE 1 has an NBI inventory load rating of 27.5 metric tons.
Who is responsible for maintaining STATE ROUTE 1?
STATE ROUTE 1 is owned and maintained by State Highway Agency.
How old is STATE ROUTE 1 and does age affect safety?
STATE ROUTE 1 was built in 1927, making it 99 years old and last reconstructed in 1938.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.