What's a bridge's favorite exercise? Cross-fit.
What's a bridge's favorite exercise? Cross-fit.
Fun fact: The average American crosses 4 bridges a day without even noticing.
over NINTH STREET
04-SON-101-20.48-SRO
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 96,000 vehicles per day and is 58 years old (reconstructed in 2009).
Its sufficiency rating of 70.1 is above 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 is likely to be a comfortable crossing for most travelers.
This bridge is 151 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 96,000 vehicles cross daily — heavy traffic, congestion likely during rush hours.
The deck is 136 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
1968
58 years old (rebuilt 2009)
Structure Type
Concrete (Continuous) Box Beam (Multiple)
Total Length
151 ft
46.0 m
Deck Width
136 ft
41.5 m
Spans
3
sections between supports
Max Span
91 ft
longest unsupported section (27.7 m)
Traffic Lanes
8 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
96,000vehicles/day
38.44228°N, 122.72124°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.
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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.