6. Wi is the weight that traffic factors impact on air quality with. Table 1 Judgment matrix of traffic factors on commercial land. Table 2 Judgment matrix of traffic factors on industrial land. Table 3 Judgment matrix of traffic factors on residential land. Table 4 Judgment matrix of traffic selleck factors on land for roads. Table 5 Judgment matrix of traffic factors on green land. Table 6 Judgment matrix of traffic factors on land for public facilities. CR

is consistency ratio which is more tending to zero; the model has the better consistency. The CR < 0.1; here, it means the sort has relatively satisfactory consistency. (2) The concentration data used in the model is the results of stripping out traffic factors. So when calculating standard percentage, standard concentrations are the product of primary index concentration and average contribution rate; here average contribution rate is 40%. (3) The pollution index uses a 1~9 scale as the yaahp software uses a 1~9 scale. M is excessive percentage. When M 0, K = 1; when 0 < M 25, K = 2; when 25 < M 75, K = 3; when 100 < M 150, K = 4; when 75 < M 100, K = 5; when 100 < M 150, K = 6; when 150 < M 200, K = 7; when 200 < M 250, K = 8; when M > 250, K = 9. 3. Analysis of Cases This section takes Nanjing as a case. Nanjing located in the midlatitude eastern China belongs to north subtropical monsoon climate zone, and the wind conversed

apparently between summer and winter. In addition, Nanjing has economic industry developed in Jiangsu Province and the Yangtze River Delta and is a typical city of our southern country. It can well reflect the east China area general urban air pollution influence degree. 3.1. Data Explanation The model’s data comes from Nanjing Municipal Environmental Protection Bureau’s official website. Table 7 is the average concentration of PM2.5 in the fourth quarter of 2013 in Nanjing by randomly sampling the statistics and has the use value. There are 10 control points existing in Nanjing, Olympic center, ZhongHuamen, MaiGaoqiao, RuiJin Road, ShanXi Road, and

XuanWu River which, respectively, represent the urban land for public facilities, land for roads, industrial land, residential land, commercial land, and green land. Table 8 is the concentration of PM2.5 only from traffic factors [5] based on Table 7. Table 8 The concentration of PM2.5 only from traffic factors μg/m3. Table 9 is the excessive Cilengitide percentage of 24-hour average levels of PM2.5 based on Table 8. The first grade indexes concentration of PM2.5 is 35μg/m3 per day, stripping out the traffic factors; take 14μg/m3 per day. Table 9 Excessive percentage of pollutants. Table 10 includes pollution level K of pollutants on the basis of Table 9. Because of the yaahp using a 1~9 scale, the pollution index of the pollution level of K also uses a 1~9 scale. Table 10 Pollution level K of pollutants. Table 7 The average concentration of PM2.5 of different monitoring station μg/m3. 3.2.