Why did the truss bridge break up with the beam bridge? It needed more support.
Why did the truss bridge break up with the beam bridge? It needed more support.
The Golden Gate Bridge uses 80,000 miles of wire in its cables.
Parametric wireframe generated from real NBI dimensions. Drag to rotate, scroll to zoom.
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This bridge has a Poor overall condition rating of 2 out of 9. This bridge is classified as being in poor condition, meaning one or more structural components have significant deterioration. Poor condition does not mean the bridge is unsafe to drive on, but it does mean repairs or replacement may be needed.
The bridge carries 12,788 vehicles per day and is 93 years old.
Its sufficiency rating of 20.0 places it below the national average of 63.6.
The NBI records a navigation clearance of 56 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 has some features that may be challenging for travelers with bridge anxiety. See the tips below for a more comfortable crossing.
This bridge is 3746 feet long — an extended crossing, several minutes.
A truss bridge — the steel framework can provide a sense of enclosure.
About 56 feet above ground — an elevated crossing, similar to a 5-10 story building.
About 12,788 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 30 feet wide with 1-2 lanes — a narrower 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
1933
93 years old
Structure Type
Steel Truss (Thru)
Total Length
3,746 ft
1141.8 m
Deck Width
30 ft
9.0 m
Spans
3
sections between supports
Max Span
608 ft
longest unsupported section (185.3 m)
Traffic Lanes
2 lanes
Two-way traffic
Clearance Below
56 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
12,788vehicles/day
29.69443°N, 91.21981°W
Steel Truss (Thru)
A steel truss bridge uses a framework of interconnected triangular elements. The geometric rigidity of triangles makes this design extremely efficient at distributing loads.
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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.