Fun fact: Covered bridges were roofed to protect the wood, not the travelers.
Fun fact: Covered bridges were roofed to protect the wood, not the travelers.
Crunching the numbers on America's infrastructure...
over YERBA BUENA ISLAND
04-SF-080-7.85L-SF
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This bridge has a Good overall condition rating of 7 out of 9. It is in good structural condition and is not classified as structurally deficient.
The bridge carries 248,000 vehicles per day and is 90 years old (reconstructed in 1962).
Its sufficiency rating of 70.0 is above the national average of 63.6.
For travelers with bridge anxiety
This bridge may cause some awareness for travelers with bridge anxiety, but has manageable characteristics.
This bridge is 262 feet long — a short crossing, about 10-15 seconds.
A standard overpass design with solid barriers on each side.
No height data available — likely a standard overpass height.
About 248,000 vehicles cross daily — very heavy traffic, high congestion risk.
The deck is 64 feet wide with 3-4 lanes — standard width.
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
1936
90 years old (rebuilt 1962)
Structure Type
Steel Stringer/Multi-beam/Girder
Total Length
262 ft
80.0 m
Deck Width
64 ft
19.4 m
Spans
8
sections between supports
Max Span
36 ft
longest unsupported section (11.0 m)
Traffic Lanes
5 lanes
Two-way traffic
Daily Traffic
248,000vehicles/day
37.80808°N, 122.36728°W
Steel Stringer/Multi-beam/Girder
A steel stringer bridge uses parallel steel beams (stringers) to support the deck. This is one of the most common bridge types in the US, valued for its simplicity and strength.
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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.