I-78 & PA.309
Carrying I-78 & PA.309 over PA 29&SR1019 CEDAR CREST
CEDAR CREST,EXIT #55(17), Lehigh, Pennsylvania
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: I-78 & PA.309
The I-78 & PA.309 bridge in Lehigh, Pennsylvania carries I-78 & PA.309 over PA 29&SR1019 CEDAR CREST. It was built in 1989, making it 37 years old today. The structure is built primarily of prestressed concrete. Daily traffic averages 11,836 vehicles, placing it in the heavily-trafficked tier of Pennsylvania bridges.
The latest FHWA inspection records show limited component ratings on file. The weakest component sits in unrated condition. No reported major component scores in the Poor range under the current federal condition thresholds.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How I-78 & PA.309 compares
Live comparison across Pennsylvania.
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 How the historical reference is calculated.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
- 1989
- Material
- Prestressed Concrete
- Avg Daily Traffic
- 11,836 vehicles/day
- Structure Number
- 000000000023042
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 I-78 & PA.309 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 I-78 & PA.309 against other structures in Lehigh and across Pennsylvania. Pennsylvania 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 I-78 & PA.309?
I-78 & PA.309 in Lehigh, Pennsylvania on the FHWA's 0–9 scale.
How often is I-78 & PA.309 inspected?
I-78 & PA.309'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 11,836 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. I-78 & PA.309 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 I-78 & PA.309?
An inventory load rating is not recorded for I-78 & PA.309.
Who is responsible for maintaining I-78 & PA.309?
Ownership is not specified for I-78 & PA.309 in the NBI.
How old is I-78 & PA.309 and does age affect safety?
I-78 & PA.309 was built in 1989, making it 37 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.