Research on service area to alleviate tidal congestion in primary and secondary schools
Urban tidal congestion has become one of the most serious urban problems in major cities in Chinese.The"commuting to school"of primary and secondary school students in cities overlaps with"commuting to work"in terms of time and space,which aggravates the phenomenon of tidal congestion in urban traffic.At present,most of the domestic and foreign studies focus on alleviating the traffic congestion caused by"commuting to work",while ignoring the traffic congestion problems caused by"commuting to school".In order to alleviate the problem of tidal traffic congestion in cities and improve the livable quality of the urban environment,it is imperative to study the alleviation of traffic problems caused by"commuting to school"from the perspective of service area.Based on the online and offline questionnaire survey of a large number of primary and secondary schools in Xi'an,and taking the primary and secondary schools in Yanta District of Xi'an as a case,SPSS software was used to analyze the correlation of multiple factors causing traffic congestion.Based on GIS platform,the accessibility of the existing roads under different travel modes was studied to master the characteristics and laws of the pick-up and drop-off behaviors in urban primary and secondary schools.The survey and analysis found that more than half of the current primary and secondary school students live outside the service scope specified in the specification.With the increase of the length of commuting to school,the proportion of students commuting on foot and by non-motor vehicles decreased,and the proportion of motor vehicle and public transport increased.There is a significant connection between the choice of commuting mode and the distance from the school.Taking the primary and secondary schools in Yanta District of Xi'an as the object,using the service area analysis and multi ring buffer zone analysis of GIS,it was found that the service area based on path analysis is irregular polygon,and the residential area covered by it is significantly less than that covered by the traditional way,which is difficult to cover all the roads around the residential area.The method of dividing service areas by Tyson polygons can cover the entire research area and also ensure that the distance from any point within the polygon to the central point within the area is shorter than that to the central points of other areas.But the division result is separated from the actual road network.Based on the scale of the school,this study combines the Tyson polygon with the service area analysis method based on the road network,the service areas of primary and secondary schools in Yanta District were redefined.After the delimitation,the school commute time within the service areas was significantly reduced,alleviating the traffic pressure to a certain extent.The study draws the following conclusions.The characteristics of"commuting to school"congestion in primary and secondary schools are:tidal-like,diffuse,centralized,and this congestion has inertia and predictability in time and space.ArcGIS traffic accessibility analysis and service area analysis based on road network are applied to determine the appropriate service scope of primary and secondary schools:500-800 meters for primary schools.The middle school is 1 000-1 500 meters.On the basis of comprehensive consideration of the size of primary and secondary schools,the service area division method based on path and Tyson polygon can effectively improve the accessibility of regional primary and secondary schools.The results of this study can provide reference for the division of the service scope of primary and secondary schools in similar urban areas,which is of great significance to alleviate the tidal congestion of urban general education and promote the efficient and low-carbon operation of the city.
commuting to schoolprimary and secondary schoolsGISservices areaaccessibility
万方数据
维普
