Wow, there are a lot of bridges here... one second please.
Wow, there are a lot of bridges here... one second please.
The Golden Gate Bridge uses 80,000 miles of wire in its cables.
over ALPINE APPROACH ROAD
2.92 MI S. OF US 9W
Parametric wireframe generated from real NBI dimensions. Drag to rotate, scroll to zoom.
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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 34,560 vehicles per day and is 72 years old.
Its sufficiency rating of 72.8 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 may cause some awareness for travelers with bridge anxiety, but has manageable characteristics.
This bridge is 50 feet long — a quick crossing, under 5 seconds at highway speed.
An arch bridge design with some openness to the surroundings.
About 15 feet above ground — standard overpass height.
About 34,560 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 61 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
1954
72 years old
Structure Type
Concrete Arch (Deck)
Total Length
50 ft
15.2 m
Deck Width
61 ft
18.5 m
Spans
1
sections between supports
Max Span
50 ft
longest unsupported section (15.2 m)
Traffic Lanes
3 lanes
One-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
34,560vehicles/day
40.95610°N, 73.92088°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.