4. Conclusion
The transportation sector is a major source of air pollution worldwide. Recent evidence has indicated
that automobile pollution poses significantly larger adverse health impacts than previously realized. As an
urban transport mode of the renewable energy, urban rail transit will be widely used not only in China but also around the world. More than 20 urban rail transit projects have been completed or are building in
china. In this study, we provide an assessment model of reducing air pollution benefit of urban rail transit.
A case of line 1 of Shijiazhuang urban rail transit is given to evaluate reducing air pollution benefit
consisting of reducing air pollution benefit of transportations mode conversions and air pollution cost of
power plant of urban rail traffic. Our results demonstrate that reducing air pollution benefit is important
components of the social value of urban rail transit.