The Analysis Of The Effect Of Beijing's Driving Restrictions On Air Quality

In recent years,the vehicle ownership has increased significantly in Beijing.Although the increase of motorization rate brings great convenience to daily life,the situation of traffic congestion and air pollution have also shown a steady and gradual upward trend.Air quality is exacting a rising toll on human health and quality of life in Beijing.In order to ease traffic congestion and Improve air quality.Driving restriction policy was first conducted during the 2008 Beijing Olympic Games,which has been a regulatory traffic policy.Many scholars both at home and abroad have been studying the policy of driving restrictions for a long time,but their researches on air quality have different results.In this paper,OLS regression and Difference-in-Differences method(DID)are be adopting for analyzing the short-term and long-term effect of driving restrictions on pollution.The daily data of air quality index(AQI)are used during period of 2008-2010 and 2013-2016.Using OLS regression to establish a regression model of air quality index and its influencing factors,including driving restrictions policy,weather factors,seasonal factor and heating factor into the model.It is concluded that driving restrictions has a significant effect on improving air pollution situation in short-term and in the long-term the effect disappears.The Difference-in-Differences method was used to estimate the regression model.The inner loop of Wuhuan was used as the treated group and the Shunyi section was used as the control group.The results showed that the driving restrictions policy was not significant to improve the air pollution either in short-term or in long-term.This paper gives a reasonable explanation and analysis of the conclusions of the study and puts forward corresponding suggestions.The innovation of this paper lies in the following three points.(1)For the first time,this article uses the data in the restricted-area region to establish a regression model,and separately analyzes the impact of Beijing's driving restrictions policy on the restricted-area region,(2)Taking atmospheric pressure factors into the model,so that geographical features can be incorporated into constraints,More comprehensively exclude the impact of other factors beyond driving restrictions policy on air quality,(3)Studying the impact of the policy on air quality for the short-term and long-term.