VERTEX : The Vertical Rotary Bridge-1

Abstract

Transportation and connectivity between locations separated by considerable differences in elevation remain significant challenges in hilly, mountainous, and geographically constrained regions. Conventional solutions such as roads, bridges, tunnels, and switchback routes often require substantial land alteration, high material usage, and continuous maintenance, prompting exploration of alternative approaches that may provide more direct and controlled connection between different elevation levels. In response to this need, the present study proposes VERTEX, a conceptual vertical rotary bridge system designed as an innovative rotary transportation concept. The VERTEX concept envisions a large rotating wheel structure supported by a central axle with passenger cabins mounted at defined positions along the rotating frame. Unlike conventional bridges that provide a fixed horizontal link, VERTEX employs controlled rotational motion to transport passengers between different levels. The proposed system integrates principles of structural engineering, mechanical rotation, cabin stabilization, and transportation infrastructure planning. The rotating mechanism is envisioned as a balanced frame rotating about a central shaft or axle. Cabin stabilization is central to passenger safety and comfort. Because cabins attached to a rotating wheel naturally change orientation as the structure turns, a stabilization mechanism would be required to maintain an upright or near-upright position. Possible approaches may include pivoting cabin mounts, counterweight systems, or guided suspension mechanisms. Structural analysis would play a major role in assessing stresses, deflections, buckling risks, and behaviour under combined loads. Finite element modelling could be used to simulate static and dynamic load cases. Environmental factors such as wind loads, weather exposure, and material degradation would necessitate careful design detailing and maintenance planning. Safety is a fundamental requirement, including emergency braking, controlled acceleration and deceleration, mechanical locking mechanisms, position sensing, and structural health monitoring. Station design would require accurate alignment for boarding and disembarking, coordinated control of cabin movement and speed reduction. The foundation and support structures would need to accommodate site-specific ground conditions, potentially requiring deep foundations or reinforced configurations adapted to hilly terrains. The proposed research methodology includes conceptual development, mechanical calculations, structural modelling, finite element simulations, and scaled  prototype testing. A scaled prototype would allow observation of cabin orientation, mechanical stability, and basic control principles, providing preliminary evidence for or against feasibility. While the concept is not presented as an immediate practical construction project, it aims to establish a technical foundation for further research into rotary transportation systems. Keywords: vertical rotary bridge, rotary transportation system, rotating wheel structure, vertical transportation, cabin stabilization, structural analysis, finite elements, alignment, drive mechanism, dynamic behaviour, safety system, hilly terrain transport, prototype development.