Route 311
Carrying Route 311 over UNKNOWN STREAM
6.36mi S of Kuihelani Hwy, Maui, Hawaii
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: Route 311
The Route 311 bridge in Maui, Hawaii carries Route 311 over UNKNOWN STREAM. It was built in 2005, making it 21 years old today. The structure is built primarily of concrete and spans 9 sections, stretching 42.8 meters (140 feet) end to end. Daily traffic averages 27,500 vehicles, placing it in the heavily-trafficked tier of Hawaii bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show culvert at 6/9. The weakest component sits in fair condition. None of this bridge's reported major components fall into the Poor condition range. Its NBI inventory load rating is 56.4 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How Route 311 compares
Live comparison across Hawaii.
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 How the historical reference is calculated.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
- 2005
- Material
- Concrete
- Number of Spans
- 9
- Structure Length
- 42.8 m (140 ft)
- Deck Width
- 42.1 m (138 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 27,500 vehicles/day
- Structure Number
- 009003110300637
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 311 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 311 against other structures in Maui and across Hawaii. Hawaii 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 311?
Route 311 in Maui, Hawaii on the FHWA's 0–9 scale.
How often is Route 311 inspected?
Route 311'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 27,500 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Route 311 is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for Route 311?
Route 311 has an NBI inventory load rating of 56.4 metric tons.
Who is responsible for maintaining Route 311?
Route 311 is owned and maintained by State Highway Agency.
How old is Route 311 and does age affect safety?
Route 311 was built in 2005, making it 21 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.