In The Science of the total environment
The implementation of short-term traffic restriction policies (TRPs) during major events positively influences the traffic emission reduction. However, few studies explore the impact of diesel vehicle emissions on air quality during short-term TRP. Also, the intertwined influences of short-term TRP and Spring Festival remains unclear. Based on Beijing 2022 Olympic Games, this study analyzed the spatiotemporal changes in urban air quality and diesel vehicle emission during short-term TRP. The results showed that the TRPs and Spring Festival contributed 50 % to the improvement of air quality and reduction of diesel vehicle emissions, respectively. The "interruption-recovery" pattern of short-term TRPs is characterized by a longer duration and a slower decline/recovery rate. Additionally, the individual contribution rate of diesel vehicle emissions to urban air pollutants was 15-20 % higher than that of meteorological factors during short-term TRPs.
Fang Xiao-Rui, Zhu Xing-Hang, Li Xing-Zhou, Peng Zhong-Ren, Qingyao Hu, He Hong-Di, Chen A J Yuan, Cheng Huang
2023-Jan-05
Air pollutants, Diesel vehicle emission, Machine learning, Regression discontinuity design, Traffic restriction policy, Winter Olympic Games
