基于结构方程的城市低收入通勤者活动-出行行为模型

Activity-travel behavior model of urban low-income commuters based on structural equation

为了分析影响低收入通勤者活动-出行的因素,揭示活动与出行之间的互动机理,基于南京市居民一日出行调查数据,采用结构方程模型建立低收入通勤者活动-出行模型.统计数据表明,低收入通勤者较多进行生存型活动,较少参与维持型活动和休闲型活动,出行链以简单工作链为主,电动车是其主要出行方式.模型标定结果显示,个人及家庭社会经济属性、可达性对低收入通勤者的活动参与、出行生成和方式选择有显著影响,并且活动-出行模式变量间也存在较强的相互关系.社会经济属性、可达性主要通过活动参与间接影响出行生成,而方式选择主要受社会经济属性和出行生成的直接影响.

To analyze the factors influencing low income commuters＇activity-travel behavior and reveal the mutual mechanism between activity and travel,a structural equation model was utilized to estimate these relationships based on Nanjing residents＇one day activitybased travel survey.Statistics indicate that low income commuters are more likely to conduct subsistence activities and have fewer propensities to make maintenance activities and leisure activities.They make more simple work chains and choose moped to travel more frequently.Model estimation results show that individual and household sociodemographics and accessibility exert significant impacts on activity participation,trip generation and mode choice of low income commuters.There also exist strong interrelationships between activity-travel attributes.Socio-demographics and accessibility have indirect influences on trip generation through activity participation.Mode choice is mainly affected by socio-demographics and trip generation directly.