6 Summary and Discussion
Demand for travel has been persistently increasing for several decades as a result of population and economic growth (Bosworth et al. 2014). Higher travel demand results in more oil consumption, which has increased the U.S. dependency on foreign oil during past decade. Moreover, at the same time, emissions from transportation sector have contributed to a large share of air pollution and caused significant concerns regarding air quality and public health. In order to address concerns regarding oil dependency and air quality, increasing the use of electric vehicles as green vehicle is helpful. Hence, the motivation of this study is to draw connection among EVs share, government incentives, and different socio-economic factors