Infrastructure often operates quietly in the background of daily life, performing complex tasks with precision and reliability. Among these systems, bascule bridges stand out as a unique example of engineering in motion, requiring careful coordination between mechanical design and physical forces to function safely and efficiently.
This balance is at the center of award-winning research by Jacquelyn Galligan of the New England Institute of Technology, recipient of the Best in Track Award for Sector Specific Management at the 2026 SAM International Business Conference.
Her work, “Balance Fundamentals of Counterweights on Bascule Bridges,” explores the foundational principles that allow these structures to operate with control and stability. At a glance, a bascule bridge may appear to simply lift and lower, but behind that movement lies a precise system governed by physics and engineering design.
The research begins with the core components of a bascule bridge: the movable leaf, the counterweight system, and the axis of rotation. These elements must work together seamlessly to ensure that the bridge can open and close smoothly without placing unnecessary strain on the structure or its mechanical systems.
A key concept explored in the study is the role of moment, which describes how forces acting at a distance from a pivot point create rotational movement. Understanding how these forces interact is essential to controlling the motion of the bridge and maintaining stability throughout its operation.
Equally important is the determination of centroids, or centers of gravity, for both the bridge leaf and the counterweights. By accurately calculating these positions, engineers can predict how the structure will behave and ensure that forces are properly balanced across the system.
The research emphasizes that true balance in these systems is not about achieving perfect equilibrium. Instead, engineers intentionally design a slight imbalance, where the bridge leaf is marginally heavier than the counterweight. This controlled imbalance ensures that the bridge remains securely seated when closed and prevents unintended movement.
This concept is brought to life through a case study of the Mystic River Bascule Bridge in Connecticut. By applying the fundamental balance equation and analyzing real-world design data, the study demonstrates how theoretical principles are translated into practical engineering decisions that affect safety and performance.
The broader implication of this work extends beyond bridge design. It highlights how foundational principles, when applied with precision, can support complex systems that must operate reliably over long periods of time. For managers and engineers alike, this serves as a reminder that even the most advanced systems depend on a clear understanding of fundamental concepts.
The Best in Track Award for Sector Specific Management recognizes research that connects technical knowledge with real-world application. Galligan’s work exemplifies this by providing both a conceptual framework and a practical demonstration of how engineering fundamentals support critical infrastructure.
As infrastructure systems continue to evolve and require ongoing investment, the ability to design, analyze, and maintain these systems with accuracy will remain essential. This research reinforces the idea that strong foundations, both in theory and in practice, are what enable complex systems to function safely and effectively.