Loading structural data... this is riveting stuff.
Loading structural data... this is riveting stuff.
The average US bridge is 48 years old. That's a lot of birthday candles.
over SAN LORENZO CREEK
04-ALA-580-R27.16
Parametric wireframe generated from real NBI dimensions. Drag to rotate, scroll to zoom.
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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 197,000 vehicles per day and is 69 years old (reconstructed in 1977).
Its sufficiency rating of 71.4 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 40 feet long — a quick crossing, under 5 seconds at highway speed.
An arch bridge design with some openness to the surroundings.
No height data available — likely a standard overpass height.
About 197,000 vehicles cross daily — very heavy traffic, high congestion risk.
The deck is 0 feet wide — a very narrow, single-lane crossing.
This bridge crosses over water. Focus on the road ahead — the water is far 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
1957
69 years old (rebuilt 1977)
Structure Type
Concrete Arch (Deck)
Total Length
40 ft
12.2 m
Spans
1
sections between supports
Max Span
40 ft
longest unsupported section (12.2 m)
Traffic Lanes
8 lanes
Two-way traffic
Daily Traffic
197,000vehicles/day
37.70198°N, 122.03644°W
Concrete Arch (Deck)
A concrete arch bridge uses a curved concrete structure to transfer loads through compression. Concrete arches are durable and can be very aesthetically pleasing.
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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.