Over 5 billion bridge crossings happen every single day in America.
Over 5 billion bridge crossings happen every single day in America.
Gathering condition ratings from coast to coast...
over DIABLO ROAD
04-CC-680-R7.55-DNVL
Parametric wireframe generated from real NBI dimensions. Drag to rotate, scroll to zoom.
Loading 3D model...
This bridge has a Fair overall condition rating of 6 out of 9. While it is not classified as structurally deficient, it shows some deterioration that is being monitored.
The bridge carries 192,200 vehicles per day and is 62 years old (reconstructed in 1994).
Its sufficiency rating of 61.6 places it below the national average of 63.6.
The NBI records a navigation clearance of 15 feet — the minimum vertical space below the bridge deck. The total height of the bridge structure (including towers, railings, and superstructure) may be higher.
For travelers with bridge anxiety
This bridge may cause some awareness for travelers with bridge anxiety, but has manageable characteristics.
This bridge is 147 feet long — a quick crossing, under 5 seconds at highway speed.
A standard overpass design with solid barriers on each side.
About 15 feet above ground — standard overpass height.
About 192,200 vehicles cross daily — very heavy traffic, high congestion risk.
The deck is 149 feet wide with multiple lanes — easy to stay in a center lane.
This bridge crosses over land, not water — no water views below.
This comfort score is designed to help individuals with bridge anxiety plan their travel. All bridges in the National Bridge Inventory are regularly inspected and deemed safe for travel. This is not medical advice — if you experience severe anxiety, please consult a healthcare professional.
Year Built
1964
62 years old (rebuilt 1994)
Structure Type
Concrete (Continuous) Box Beam (Multiple)
Total Length
147 ft
44.8 m
Deck Width
149 ft
45.4 m
Spans
3
sections between supports
Max Span
87 ft
longest unsupported section (26.5 m)
Traffic Lanes
9 lanes
Two-way traffic
Clearance Below
15 ft
navigation clearance under deck
Clearance height compared to familiar objects
Height shown is the navigation clearance below the bridge deck. The total height of the bridge structure (including towers and superstructure) may be higher.
Daily Traffic
192,200vehicles/day
37.82282°N, 121.99334°W
Concrete (Continuous) Box Beam (Multiple)
A concrete box beam bridge uses hollow rectangular concrete sections. The box shape provides excellent torsional resistance and allows for longer spans.
Learn more about this bridge typeNo ratings yet. Be the first to rate this bridge!
Sign in and track California to receive alerts when new inspection data is published. Premium members get bridge-specific notifications.
Data from the National Bridge Inventory (NBI), maintained by the Federal Highway Administration (FHWA).
Data year: 2025. Conditions may have changed since the last inspection.
This information is provided for educational and informational purposes only. It should not be used as the sole basis for any decisions related to bridge safety or transportation planning. Always consult official sources and local authorities for the most current data.