ROUTE 101N ONRAMP
Carrying ROUTE 101N ONRAMP over ALEMANY CIR UC (NBD O-R)
04-SF-101-2.20-SF, San Francisco, California
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: ROUTE 101N ONRAMP
The ROUTE 101N ONRAMP bridge in San Francisco, California carries ROUTE 101N ONRAMP over ALEMANY CIR UC (NBD O-R). It was built in 1950, making it 76 years old today. The structure is built primarily of steel. Daily traffic averages 900 vehicles, placing it in the lower-traffic tier of California bridges.
The latest FHWA inspection records show limited component ratings on file. The weakest component sits in unrated condition. None of this bridge's reported major components fall into the Poor condition range.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How ROUTE 101N ONRAMP 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 How the historical reference is calculated.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
- 1950
- Material
- Steel
- Avg Daily Traffic
- 900 vehicles/day
- Structure Number
- 34 0063S
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether ROUTE 101N ONRAMP is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare ROUTE 101N ONRAMP against other structures in San Francisco 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 ROUTE 101N ONRAMP?
ROUTE 101N ONRAMP in San Francisco, California on the FHWA's 0–9 scale.
How often is ROUTE 101N ONRAMP inspected?
ROUTE 101N ONRAMP'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 900 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. ROUTE 101N ONRAMP is currently shown as unrated condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for ROUTE 101N ONRAMP?
An inventory load rating is not recorded for ROUTE 101N ONRAMP.
Who is responsible for maintaining ROUTE 101N ONRAMP?
Ownership is not specified for ROUTE 101N ONRAMP in the NBI.
How old is ROUTE 101N ONRAMP and does age affect safety?
ROUTE 101N ONRAMP was built in 1950, making it 76 years old.
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.