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《Acta Geographica Sinica》 2012-12
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Traffic Flow Simulation Based on Call Detail Records

WU Jiansheng1,HUANG Li1,LIU Yu2,PENG Jian3,LI Weifeng4,GAO Song2,KANG Chaogui2(1.Shenzhen Graduate School of Peking University,The Key Laboratory for Environmental and Urban Sciences,Shenzhen 518055,Guangdong,China;2.Institute of Remote Sensing and Geographical Information System,Peking University,Beijing 100871,China;3.College of Urban and Environmental Sciences,Peking University,Beijing 100871,China;4.Department of Urban Planning and Design,The University of Hong Kong,Hong Kong,China)  
Urban social and economic activity analysis based on mobile location data is a magnificent context for human mobility research and the traffic flow is one of the most basic activities.In order to restore the use of urban transportation network and examine its distribution,we apply a novel approach to draw a traffic flow distribution map of local road network based on a large number of individual cellphone detailed records.We reconstruct details of individual user's mobility and generate its traffic flow step by step:1.Sampling cellphone records from local operator;2.simulating the random start point and end point for each individual by Monte Carlo;3.working out its route through the shortest path.After sampling and simulating thousands of records in one day,we finally draw a traffic flow distribution map of local road network,in which we uncover that a large portion of roads contains a small portion of flows and vice versa.In further statistical analysis,we reach the 20/80 principle of traffic flow:20% of the top roads accommodate 80% of traffic flow.And flow distribution of different road types reflects the function of urban transportation networks.This research make a contribution to the reconstructed historical traffic flow distribution,studies on urban road network pattern and scenario simulation of transportation planning.
【Fund】: 国家自然科学基金项目(41271101)~~
【CateGory Index】: U491.112
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