Connecting the data points... literally.
Connecting the data points... literally.
Analyzing deck conditions, superstructure ratings, and bad puns...
over CSX RAILROAD
POLK AVE @ GLASS AVE
Parametric wireframe generated from real NBI dimensions. Drag to rotate, scroll to zoom.
Loading 3D model...
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 9,452 vehicles per day and is 75 years old.
Its sufficiency rating of 68.5 is above the national average of 63.6.
The NBI records a navigation clearance of 31 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 75 feet long — a quick crossing, under 5 seconds at highway speed.
An arch bridge design with some openness to the surroundings.
About 31 feet above ground — moderate height, similar to a 3-5 story building.
About 9,452 vehicles cross daily — light traffic, a smooth crossing.
The deck is 36 feet wide with 2-3 lanes — moderate 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
1951
75 years old
Structure Type
Concrete Arch (Deck)
Total Length
75 ft
22.9 m
Deck Width
36 ft
11.1 m
Spans
1
sections between supports
Max Span
62 ft
longest unsupported section (18.9 m)
Traffic Lanes
2 lanes
Two-way traffic
Clearance Below
31 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
9,452vehicles/day
36.13182°N, 86.74953°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.
Learn more about this bridge typeNo ratings yet. Be the first to rate this bridge!
Sign in and track Tennessee to receive alerts when new inspection data is published. Premium members get bridge-specific notifications.
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.