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over IS 264 WBL
Downtown Tun. Portsmouth
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 3,800 vehicles per day and is 75 years old (reconstructed in 1990).
Its sufficiency rating of 58.9 places it below the national average of 63.6.
The NBI records a navigation clearance of 14 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 is likely to be a comfortable crossing for most travelers.
This bridge is 32 feet long — a quick crossing, under 5 seconds at highway speed.
A standard overpass design with solid barriers on each side.
About 14 feet above ground — standard overpass height.
About 3,800 vehicles cross daily — light traffic, a smooth crossing.
The deck is 103 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
1951
75 years old (rebuilt 1990)
Structure Type
Prestressed Concrete Slab
Total Length
32 ft
9.8 m
Deck Width
103 ft
31.5 m
Spans
1
sections between supports
Max Span
32 ft
longest unsupported section (9.8 m)
Traffic Lanes
7 lanes
Two-way traffic
Clearance Below
14 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
3,800vehicles/day
36.83114°N, 76.30073°W
Prestressed Concrete Slab
A prestressed concrete slab bridge uses a flat concrete deck that has been pretensioned for additional strength. Efficient for short to medium spans.
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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.