Fun fact: The average American crosses 4 bridges a day without even noticing.
Fun fact: The average American crosses 4 bridges a day without even noticing.
The Brooklyn Bridge was sold to gullible tourists so many times it became a saying.
over MISS. R./FRONT ST/BN
W EDGE DWNTWN QUINCY
Parametric wireframe generated from real NBI dimensions. Drag to rotate, scroll to zoom.
Loading 3D model...
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 8,450 vehicles per day and is 96 years old (reconstructed in 1981).
Its sufficiency rating of 55.0 places it below the national average of 63.6.
The NBI records a navigation clearance of 55 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 3511 feet long — an extended crossing, several minutes.
A truss bridge — the steel framework can provide a sense of enclosure.
About 55 feet above ground — an elevated crossing, similar to a 5-10 story building.
About 8,450 vehicles cross daily — light traffic, a smooth crossing.
The deck is 25 feet wide with 1-2 lanes — a narrower crossing.
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
1930
96 years old (rebuilt 1981)
Structure Type
Steel (Continuous) Truss (Thru)
Total Length
3,511 ft
1070.3 m
Deck Width
25 ft
7.6 m
Spans
2
sections between supports
Max Span
628 ft
longest unsupported section (191.3 m)
Traffic Lanes
2 lanes
One-way traffic
Clearance Below
55 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
8,450vehicles/day
39.93111°N, 91.42081°W
Steel (Continuous) Truss (Thru)
A steel truss bridge uses a framework of interconnected triangular elements. The geometric rigidity of triangles makes this design extremely efficient at distributing loads.
Learn more about this bridge typeNo ratings yet. Be the first to rate this bridge!
Sign in and track Illinois 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.