Effect Of The Built Environment Of Home-end And Workplace-end On Travel Behavior In Access And Egress Segments Of Metro Commuters

With the development of TOD concept,behavior of multi-mode rail trip has become an increasingly concerned study field.However,due to the access and egress time usually occupies majority of commuting time,how to improve the access and egress segments to enchance the efficiency of the overall metro commuting trip chain is an urgent need for research.This paper relies on the National 973 Program Research Project(2012CB725402)and National Natural Science Foundation of China(51338003,51378120).In the context of the rapid development of urban rail transit in China,this study explores characteristics of trips and access/egress mode choice under the built environment's influence for target metro commuters,who live or work within 2 km away from metro stations.Beginning with individual commuting trip characteristics,the RP survey was designed to capture and collect commuting behavior and trip satisfaction of the target metro commuters,and established database for these two groups respectively.Based on the database mentioned,the multi-mode trip structures of commuters were concluded.;Individual attributes,journey details and satisfaction to connection influenced by the built environment during access and egress segments were taken into consideration to analyze the characteristics of the survey sample data,which contributed to the selection of mode choice model variables.Then the access and egress mode choice models were built separately based on MNL approach to reveal the choice mechanism of access and access mode for metro commuters.Through the comparison of connection mode choice behavior conducted for both home-end and work-end respondents,variables,utility to access and egress mode choice was explored and built environment key factors that constrain the improvement of connections with metro stations were found.Finally,improvement policies and suggestions of built environment surrounding the metro station were correspondingly proposed,which would provide quantitative theoretical basis for enchancing the efficiency of the overall metro commuting trip chain.The results showed compared with individual attributes and journey details,built environment factors had a more significant influence in utility to access and egress mode choice.Improving the population density of the residence or the work place as well as the density and connectivity of the road network within the community,and narrowing the area of the residence or work unit,and shortening the distance from the residence or work place to the bus station or the public bicycle lease point could effectively induce metro commuters to use non-motor mode in access and egress segments as well.Meanwhile,there were differences in satisfaction of the service level of traffic facilities between home-end surveyed respondents and work-end surveyed respondents,and surveyed respondents in work place who chose bus as egress mode were more sensitive to the service level of traffic facilities than surveyed respondents in residence place.Compared to previous study,this paper discussed how the built environment affected the connection mode choice of metro commuters who live or work within 2 km away from metro stations from a micro perspective.The results of this study would provide basis for policy-making in improving connection environment surrounding the metro stations as well as enhance the satisfaction of connection traffic facilities and the overall metro trip attraction.