Human Powered Vehicle is basically the name given to all vehicles that are run by the physical application of strength of driver and are required to reduce the pollution. Although all bicycle are also human powered vehicles but trikes are well renowned vehicles for their better ergonomics, low center-of-gravity, optimized wheelbase, wheel-track, easy steering geometry and frame. Only because of these reasons this vehicle become best for elders and injured people. For the optimum design, many factors have to be considered to prevent it from toppling over during cornering at tight turns. The sustainability of the vehicle and environment friendly nature is quite favorable for its popularity.
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