Evaluation of external costs in road transport under the openness of a gated community  

作　　者：Ming CAI Jing LI Zhanyong WANG Haibo WANG 

机构地区：[1]Guangdong Provincial Key Laboratory of Intelligent Transportation System,School of Intelligent Systems Engineering,Sun Yat-Sen University,Guangzhou 518107,China [2]College of Transportation and Civil Engineering,Fujian Agriculture and Forestry University,Fuzhou 350108,China [3]School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China

出　　处：《Frontiers of Earth Science》2020年第1期140-151,共12页地球科学前沿（英文版）

基　　金：This work is partially supported by the National Natural Science Foundation of China(Grant Nos.41701552,11574407);the Science and Technology Project of Guangzhou,China(No.201803030032);the Natural Science Foundation of Guangdong Province(No.2018A030310333).Comments and suggestions from the reviewers and editor are highly appreciated.

摘　　要：Residential quarters in Chinese cities are usually walled off from their surrounding roads for security purposes.Recently,the Chinese government has decided to thoroughly open gated residential communities in order to improve traffic capacity and coordinate major roads in the road network,which will inevitably pose challenges,such as environmental pollution,for community members.Unfortunately,before this decision,there were no comprehensive investigations into whether this measure works for road traffic or how much the adverse impact exerts upon residents.Here,we propose a comprehensive method combining microscopic traffic simulation with a vehicle exhaust emission and dispersion model and a noise emission and attenuation model,in addition to a consideration of social cost,to evaluate the possible influence of opening an enclosed residential community to surrounding roads.The validity of the hybrid model was assessed by an assumptive case of two rectangular gated communities under varying traffic flow and five community opening modes.Preliminary results indicate that the opened community outperforms the gated in the most of 49 percent reduction in comprehensive cost.A more detailed analysis reveals that the appropriate extent of openness should rely on the actual situation,and potentially serves as a foundation for the healthy development of communities and cities.Based on the case study results,this paper outlines some strategical suggestions for improving enclosed residential areas by striking a better balance between traffic capacity and environmental risks.

关 键 词：ROAD traffic SOCIAL cost EXTERNALITY GATED RESIDENTIAL area 

分 类 号：U49[交通运输工程—交通运输规划与管理]