Crunching the numbers on America's infrastructure...
Crunching the numbers on America's infrastructure...
Wow, there are a lot of bridges here... one second please.
over SOUTHERN RAILROAD
4.0 MI N OF BLACKSBURG
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 8 out of 9. It is in good structural condition and is not classified as structurally deficient.
The bridge carries 50,700 vehicles per day and is 7 years old.
Its sufficiency rating of 84.6 is above the national average of 63.6.
The NBI records a navigation clearance of 24 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 156 feet long — a quick crossing, under 5 seconds at highway speed.
A standard overpass design with solid barriers on each side.
About 24 feet above ground — moderate height, similar to a 3-5 story building.
About 50,700 vehicles cross daily — heavy traffic, congestion likely during rush hours.
The deck is 111 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
2019
7 years old
Structure Type
Steel Stringer/Multi-beam/Girder
Total Length
156 ft
47.5 m
Deck Width
111 ft
33.8 m
Spans
1
sections between supports
Max Span
156 ft
longest unsupported section (47.5 m)
Traffic Lanes
4 lanes
Two-way traffic
Clearance Below
24 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
50,700vehicles/day
35.15976°N, 81.46721°W
Steel 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.