Connecting the data points... literally.
Connecting the data points... literally.
Loading... unlike some bridges, we promise not to leave you hanging.
over COMB MBTA & RELIEF
SOUTH STATION
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 0 vehicles per day and is 31 years old.
Its sufficiency rating of 56.1 places it below the national average of 63.6.
The NBI records a navigation clearance of 27 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 77 feet long — a quick crossing, under 5 seconds at highway speed.
A standard overpass design with solid barriers on each side.
About 27 feet above ground — moderate height, similar to a 3-5 story building.
Only about 0 vehicles cross daily — very light traffic with low congestion risk.
The deck is 69 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
1995
31 years old
Structure Type
Steel Box Beam (Multiple)
Total Length
77 ft
23.4 m
Deck Width
69 ft
21.0 m
Spans
1
sections between supports
Max Span
77 ft
longest unsupported section (23.4 m)
Traffic Lanes
4 lanes
Two-way traffic
Clearance Below
27 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
0vehicles/day
42.34882°N, 71.05688°W
Steel Box Beam (Multiple)
A steel box beam bridge uses hollow rectangular steel sections that provide excellent torsional resistance and allow for longer spans.
Learn more about this bridge typeNo ratings yet. Be the first to rate this bridge!
Sign in and track Massachusetts 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.