Is INTERSTATE 80 Safe?
INTERSTATE 80 in California has a Condition Score of 59/100 (Grade C). The deck is rated 7/9, superstructure 7/9, and substructure 5/9. The bridge is not currently classified as structurally deficient. Built in 1954 (72 years old), it carries approximately 531K vehicles per day.
INTERSTATE 80 carries a C on the BridgeSafety Condition Score with 59/100. Component ratings sit in the middle of the FHWA NBI distribution; rehabilitation programming is likely on the owning agency’s medium-term horizon.
The bridge was built in 1954 and is now 72 years old, at or past the typical 50-year design life for bridges of its vintage. Maintenance and inspection cycles are correspondingly more involved than for newer structures. INTERSTATE 80 carries an average daily traffic count of 531,000 vehicles, with 14 lane(s) crossing Buried Walkway. The owning agency is State Highway Agency; bridge inspection records flow into the federal NBI database annually.
BridgeSafety reads the FHWA National Bridge Inventory (NBI) — the authoritative federal dataset covering every public road bridge longer than 20 feet in the United States. Each bridge record includes age, structural condition by component, traffic load, and the formal sufficiency rating that determines federal funding eligibility.
The Structurally Deficient designation flags bridges where at least one primary component (deck, superstructure, substructure) is rated in poor condition on the FHWA 0-9 scale. FHWA explicitly notes that bridges with this designation remain open and safe when they meet load-rating requirements; the designation signals rehabilitation need, not closure.
What the Condition Score Means
INTERSTATE 80's Condition Score of 59/100 lands in the C tier. At least one of the three primary components is rated "Fair" on the 0-9 NBI scale. A Fair rating means minor cracking, spalling, or section loss is observed but the component continues to function as designed. Bridges at this score are commonly programmed for rehabilitation in the state's Statewide Transportation Improvement Program (STIP) when funding cycles permit.
INTERSTATE 80 is not currently classified as structurally deficient. All three primary components — deck, superstructure, and substructure — rate above 4 on the FHWA NBI 0-9 scale, the threshold for the federal "structurally deficient" label. The bridge remains in the routine inspection cycle (typically every 24 months) without triggering federal rehabilitation funding eligibility.
Component Ratings
| Component | Rating | Scale |
|---|---|---|
| Deck | 7 | /9 |
| Superstructure | 7 | /9 |
| Substructure | 5 | /9 |
| Overall Score | 59/100 | Grade C |
FHWA scale: 9 Excellent, 7 Good, 5 Fair, 4 Poor, lower readings indicate progressively worse condition. Component ratings reflect the most recent inspection submitted to the National Bridge Inventory.
Age and Traffic Context
INTERSTATE 80 dates to 1954, making it 72 years old. The structure is past the 50-year mark commonly used as an FHWA cutoff for older inventory. Bridges in this age range often appear in state DOT replacement plans because cumulative deterioration and changing design standards (lane width, load capacity) make replacement more cost-effective than continued rehabilitation.
INTERSTATE 80 carries roughly 531K vehicles per day, a heavy traffic volume that places it among the higher-priority structures in the inventory for maintenance allocation. Heavy daily traffic accelerates deck wear, joint deterioration, and accumulated fatigue on superstructure elements, which is why busy interstate and arterial bridges often appear on rehabilitation priority lists.
Bridge Details
Frequently Asked Questions
Is INTERSTATE 80 safe to cross?
INTERSTATE 80 remains open to traffic at posted load limits set by the owning state DOT. Its current Condition Score is 59/100 (Grade C). NBI condition ratings describe observed physical condition; they are not closure or safety determinations. State DOTs and the FHWA bridge program are the authoritative sources for any operational restriction on a specific structure. The bridge does not meet the federal definition of "structurally deficient."
What do the deck, superstructure, and substructure ratings mean?
On the FHWA NBI 0-9 scale: 9 is Excellent, 7 Good, 5 Fair, 4 Poor, and 0 means the component has failed. INTERSTATE 80 rates deck 7/9, superstructure 7/9, and substructure 5/9. The deck is the riding surface; the superstructure carries loads from deck to bearings (girders, beams, trusses); the substructure transfers loads to foundations (piers, abutments). A rating of 4 or lower on any of the three triggers the "structurally deficient" classification.
When was INTERSTATE 80 last inspected?
Federal regulation requires inspection at least every 24 months by a certified team leader. Inspection records flow from the California Department of Transportation to the FHWA NBI; the dataset on this page reflects the 2025 federal NBI release, refreshed April 2026. For the most recent inspection report or any operational status (postings, lane closures), the California DOT is the authoritative source.
Is INTERSTATE 80 structurally deficient?
No — INTERSTATE 80 does not currently meet the FHWA "structurally deficient" definition. All three primary components rate above 4 on the NBI 0-9 scale.
Where can I see official inspection records for INTERSTATE 80?
The Federal Highway Administration publishes the underlying inspection data through the National Bridge Inventory (https://www.fhwa.dot.gov/bridge/nbi.cfm). The California DOT publishes additional state-level reporting and operational notices. The ASCE Infrastructure Report Card provides national-level analysis that draws on the same NBI data.