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Fun fact: The average American crosses 4 bridges a day without even noticing.
over RTE I278 John Warren AV
I278 OVER THE NARROWS
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 202,650 vehicles per day and is 59 years old (reconstructed in 2008).
Its sufficiency rating of 55.6 places it below the national average of 63.6.
The NBI records a navigation clearance of 69 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 1410 feet long — a moderate crossing, about 30 seconds.
A standard overpass design with solid barriers on each side.
About 69 feet above ground — an elevated crossing, similar to a 5-10 story building.
About 202,650 vehicles cross daily — very heavy traffic, high congestion risk.
The deck is 45 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
1967
59 years old (rebuilt 2008)
Structure Type
Steel Stringer/Multi-beam/Girder
Total Length
1,410 ft
429.8 m
Deck Width
45 ft
13.8 m
Spans
12
sections between supports
Max Span
142 ft
longest unsupported section (43.2 m)
Traffic Lanes
3 lanes
One-way traffic
Clearance Below
69 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
202,650vehicles/day
40.61082°N, 74.03195°W
Steel 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.