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Khandker M. Nurul Habib Catherine Morency 《Transportation Research Part A: Policy and Practice》2012,46(2):241-254
This paper presents an econometric model for the behaviour of carsharing users. The econometric model is developed to jointly forecast membership duration, the decision to become an active member in a particular month, and the frequency of monthly usage of active members. The model is estimated using the membership directory and monthly transaction data of a carsharing program, ‘Communauto Inc.’, based in Montréal, Canada. The model shows a high degree of fit to the observed dataset and provides many behavioural details of carsharing users. The results are instructive to carsharing planners in devising efficient policies. 相似文献
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In this paper, we develop an approach for modeling the daily number of non-work, out-of-home activity episodes for household heads that incorporates in its framework both interactions between such members and activity setting (i.e. independent and joint activities). Trivariate ordered probit models are estimated for the heads of three household types – couple, non-worker; couple, one-worker; and couple, two-worker households – using data from a trip diary survey that was conducted in the Greater Toronto Area (GTA) during 1987. Significant interactions between household heads are found. Moreover, the nature of these interactions is shown to vary by household type implying that decision-making structures and, more generally, household dynamics also vary by household type. In terms of predictive ability, the models incorporating interactions are found to predict more accurately than models excluding interactions. The empirical findings emphasize the importance of incorporating interactions between household members in activity-based forecasting models. 相似文献
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The lack of personalized solutions for managing the demand of joint leisure trips in cities in real time hinders the optimization of transportation system operations. Joint leisure activities can account for up to 60% of trips in cities and unlike fixed trips (i.e., trips to work where the arrival time and the trip destination are predefined), leisure activities offer more optimization flexibility since the activity destination and the arrival times of individuals can vary.To address this problem, a perceived utility model derived from non-traditional data such as smartphones/social media for representing users’ willingness to travel a certain distance for participating in leisure activities at different times of day is presented. Then, a stochastic annealing search method for addressing the exponential complexity optimization problem is introduced. The stochastic annealing method suggests the preferred location of a joint leisure activity and the arrival times of individuals based on the users’ preferences derived from the perceived utility model. Test-case implementations of the approach used 14-month social media data from London and showcased an increase of up to 3 times at individuals’ satisfaction while the computational complexity is reduced to almost linear time serving the real-time implementation requirements. 相似文献
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文章结合丽攀高速公路攀枝花段工程项目建设实践,采用层次分析法,建立高速公路路地共建三层次效益评价指标体系,对高速公路建设效益进行多层次评价分析,指出了丽攀高速公路综合效益高的关键点,为今后的高速公路建设管理提供借鉴。 相似文献
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介绍天津至北京大兴国际机场联络线接轨方案研究过程。首先选取影响接轨方案的各种因素,对接轨点、路网规划及既有线干扰等关键因素进行深入分析,根据工程实际情况,分别提出了区间接轨、胜芳站接轨、霸州南站接轨三个比选方案,并对每个方案的优缺点进行综合分析。最后推荐工程投资较少、符合路网整体规划、对既有线干扰最小的胜芳站接轨方案。 相似文献
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城轨共线运营段信号系统的升级不但需要考虑升级过程对相关线路运营交路的影响,还需要综合分析工程实施难度、周期和成本等问题。结合大连地铁3号线与金普线共线运营段3号线续建线信号系统设备现状和最终状态,在保障过渡期间安全和不中断运营的基础上,对既有固定闭塞制式信号系统分阶段升级至移动闭塞CBTC制式信号系统方案进行研究,以实现逐步提升线路运能的目的。 相似文献