The Golden Gate Bridge uses 80,000 miles of wire in its cables.
The Golden Gate Bridge uses 80,000 miles of wire in its cables.
What did one bridge say to the other? 'You're looking a bit stressed.'
over CLINCHFIELD RR&FAU 3987
IN JOHNSON CITY
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 43,857 vehicles per day and is 49 years old.
Its sufficiency rating of 66.0 is above the national average of 63.6.
The NBI records a navigation clearance of 26 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 345 feet long — a short crossing, about 10-15 seconds.
A standard overpass design with solid barriers on each side.
About 26 feet above ground — moderate height, similar to a 3-5 story building.
About 43,857 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 53 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
1977
49 years old
Structure Type
Steel (Continuous) Stringer/Multi-beam/Girder
Total Length
345 ft
105.2 m
Deck Width
53 ft
16.3 m
Spans
3
sections between supports
Max Span
138 ft
longest unsupported section (42.1 m)
Traffic Lanes
3 lanes
One-way traffic
Clearance Below
26 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
43,857vehicles/day
36.31737°N, 82.34770°W
Steel (Continuous) 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.