Why did the truss bridge break up with the beam bridge? It needed more support.
Why did the truss bridge break up with the beam bridge? It needed more support.
Loading structural data... this is riveting stuff.
over Penn Ctr Undgrd St Sys
N of Market Street 28E12
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 10,100 vehicles per day and is 69 years old.
Its sufficiency rating of 61.4 places it below the national average of 63.6.
For travelers with bridge anxiety
This bridge is likely to be a comfortable crossing for most travelers.
This bridge is 50 feet long — a quick crossing, under 5 seconds at highway speed.
A standard overpass design with solid barriers on each side.
No height data available — likely a standard overpass height.
About 10,100 vehicles cross daily — moderate traffic, some congestion possible.
The deck is 50 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
1957
69 years old
Structure Type
Steel Girder & Floorbeam
Total Length
50 ft
15.2 m
Deck Width
50 ft
15.2 m
Spans
1
sections between supports
Max Span
50 ft
longest unsupported section (15.2 m)
Traffic Lanes
2 lanes
One-way traffic
Daily Traffic
10,100vehicles/day
39.95427°N, 75.16815°W
Steel Girder & Floorbeam
A steel girder bridge relies on large steel I-beams or plate girders as the primary load-bearing members. These bridges can span significant distances and carry heavy loads.
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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.