I. INTRODUCTION
In this study, the two-wheeled mobile vehicle is proposed and named as human conveyance vehicle (HCV). HCV is a new type of personal vehicle that has only two coaxially mounted wheels and a platform. Therefore, it occupies a small space. HCVs have high mobility and are suitable to be used in metropolis environments. They have many benefits for the user and the environment such as improving the city life quality, easier to park, and less gasoline use. Obviously, it can also help reduce the impact of global warming.