The average US bridge is 48 years old. That's a lot of birthday candles.
The average US bridge is 48 years old. That's a lot of birthday candles.
Fun fact: The average American crosses 4 bridges a day without even noticing.
over CUMBERLAND RIVER & B428
2 M S JCT SR6&SR45
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 71,975 vehicles per day and is 21 years old.
Its sufficiency rating of 62.1 places it below the national average of 63.6.
The NBI records a navigation clearance of 39 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 1135 feet long — a moderate crossing, about 30 seconds.
A standard overpass design with solid barriers on each side.
About 39 feet above ground — moderate height, similar to a 3-5 story building.
About 71,975 vehicles cross daily — heavy traffic, congestion likely during rush hours.
The deck is 73 feet wide with multiple lanes — easy to stay in a center lane.
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
2005
21 years old
Structure Type
Steel (Continuous) Stringer/Multi-beam/Girder
Total Length
1,135 ft
346.1 m
Deck Width
73 ft
22.3 m
Spans
3
sections between supports
Max Span
325 ft
longest unsupported section (99.1 m)
Traffic Lanes
4 lanes
One-way traffic
Clearance Below
39 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
71,975vehicles/day
36.23575°N, 86.71022°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.