Analyzing deck conditions, superstructure ratings, and bad puns...
Analyzing deck conditions, superstructure ratings, and bad puns...
Why did the truss bridge break up with the beam bridge? It needed more support.
over CAPE COD CANAL
JUNCTION MA RTES 3 & 6
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 5 out of 9. While it is not classified as structurally deficient, it shows some deterioration that is being monitored.
The bridge carries 61,701 vehicles per day and is 91 years old (reconstructed in 1981).
Its sufficiency rating of 57.6 places it below the national average of 63.6.
The NBI records a navigation clearance of 135 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 has some features that may be challenging for travelers with bridge anxiety. See the tips below for a more comfortable crossing.
This bridge is 1408 feet long — a moderate crossing, about 30 seconds.
An arch bridge design with some openness to the surroundings.
About 135 feet above ground — a high bridge with significant elevation.
About 61,701 vehicles cross daily — heavy traffic, congestion likely during rush hours.
The deck is 49 feet wide with 2-3 lanes — moderate width.
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
1935
91 years old (rebuilt 1981)
Structure Type
Steel Arch (Thru)
Total Length
1,408 ft
429.1 m
Deck Width
49 ft
14.8 m
Spans
1
sections between supports
Max Span
616 ft
longest unsupported section (187.7 m)
Traffic Lanes
4 lanes
Two-way traffic
Clearance Below
135 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
61,701vehicles/day
41.77622°N, 70.54364°W
Steel Arch (Thru)
A steel arch bridge uses a curved steel structure to carry loads primarily through compression. These bridges are known for their elegant appearance and structural efficiency.
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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.