This study took Line 1 of Shijiazhuang urban rail transit as an example to computer the reducing the
air pollution benefits. Line 1 of Shijiazhuang urban rail transit is presented in figure 1, which is 39.2 km
from Shijiazhuang to Zhengding. There are 28 stations, a power station and 556000 person/day.
Moreover, traffic flow rate of peak hour reach 30000 person/hour.