2013 Session: 686

• Tour-Based Mode Choice of Joint Household Travel Patterns on Weekend and Weekday
  Abstract: Joint household travel, with or without joint participation in an activity, constitutes a fundamental aspect in modelling activity-based travel behaviour. This paper examines joint household activities and travel using a utility maximising approach that considers all household members as active agents in the household decision-making. An individual tour-based mode choice model is formulated contingent on joint household decisions where joint household activities and shared ride arrangements are recognised as part of the joint household decision-making that influences the travel patterns of each household member. Two models, one for weekend and one for weekday, are estimated using empirical data from the Sydney Household Travel Survey. The results show that weekend travel is characterised by a high joint household activity participation rate while weekday travel is distinguished by more intra-household shared ride arrangements. The generation of joint household travel patterns is highly associated with travel purpose, social and mobility constraints and household resources. On weekends, public transport is mainly used by captive users (i.e., no-car households and students) and its share is about half of that on weekdays. Also, values of travel time are found to be higher on weekends than on weekdays. This paper highlights the importance of studying joint household travel and using different transport management measures for alleviating traffic congestion on weekdays and weekends.
  Authors: Ho, Chinh; Mulley, Corinne
  Authors: Ho, Chinh; Mulley, Corinne
  Year: 2013
  Document Type: Paper
  Subject: Planning and Forecasting
  Session: 686
  Paper Number: 13-0609
• Random Regret and Random Utility in the Household Purchase of a Motor Vehicle
  Abstract: Random utility maximisation is the preeminent behavioural theory used to model choices. An alternative paradigm, however, is random regret minimisation. While the majority of the literature examines the choices of individuals, this paper compares the choices of groups, as well individuals, in both the utility maximisation and regret minimisation frameworks and explores the influence household members have with respect to an automobile purchase decision within an interactive agency choice experiment. Regret minimisation is shown to be the preferred behavioural mechanism for groups and individuals within groups who shoulder a high degree of responsibility for the choice of the group.
  Authors: Beck, Matthew John; Chorus, Caspar; Rose, John Matthew; Hensher, David A.
  Authors: Beck, Matthew John; Chorus, Caspar; Rose, John Matthew; Hensher, David A.
  Year: 2013
  Document Type: Paper
  Subject: Planning and Forecasting
  Session: 686
  Paper Number: 13-0577
• Modeling Uncertainty in Households’ Activity Engagement Decisions
  Abstract: Studying travel behavior and activity engagement in an activity-based framework has been a focus of research for nearly half a century. A number of elegant and comprehensive models have been developed to address questions pertaining to activity participation, agenda formation, scheduling, and travel behavior of individuals. Despite the progress made in activity-based models, there is still a significant need for model improvements in the sense of modeling activity selection procedure and scheduling. In this paper, we propose a comprehensive model, which is the integration of discrete choice models, fuzzy concepts and Household Activity Pattern Problem (HAPP) to forecast household activity pattern based on socio-demographic characteristics. By using the values of probabilities obtained from a multivariate probit model applied to clustered households and mapping them to a set of fuzzy graphs, we compute the possibility of inclusion of an activity in the agenda. Activity scheduling and selection is then modeled as the outcome of a mixed integer optimization problem, in which the objective function is maximizing the expected desirability gained from activities and total saved time, subject to network connectivity, time windows, time budget and cost budget constraints.
  Authors: Allahviranloo, Mahdieh; Recker, Will
  Authors: Allahviranloo, Mahdieh; Recker, Will
  Year: 2013
  Document Type: Paper
  Subject: Planning and Forecasting
  Session: 686
  Paper Number: 13-2876
• Exploration of Intrahousehold Motorized Vehicle Allocation Using 2009 National Household Travel Survey
  Abstract: This study examines intra-household vehicle allocation to drivers and trips using data from the 2009 National Household Travel Survey and is motivated by the fact that reallocating household vehicles is a reasonable short-term action to reduce fuel and associated emissions. Models are developed for households in the national sample and for segmentations by population and Census regions. Binomial logistic regression is used to model whether a household fleet is optimal and whether a household is a high potential saver (HPS). Of households with two or more vehicles, 31% are classified as HPS. Linear regression is used to model the number of gallons of fuel a household can potentially save per year with vehicle reallocation. About 59% of households can reduce fuel consumption by an estimated 5.2%, or approximately five billion gallons of fuel nationally, if they reallocate their fleet. Household size and lifecycle, travel behavior, and fleet composition are related to intra-household vehicle allocation. Similar variables are significant predictors of potential gallons of savings and whether a household is an HPS. Models are consistent across regions with minor exceptions. Rural areas had differences from more urban areas. This study has demonstrated that appreciable savings in fuel consumption and associated emissions is plausible through vehicle reallocation and the ability to pursue this countermeasure in the short-term motivates further research to more fully understand causal mechanisms and target households for intervention.
  Authors: Nam, Richard; Lee, Brian H. Y.; Aultman-Hall, Lisa; Sears, Justine
  Authors: Nam, Richard; Lee, Brian H. Y.; Aultman-Hall, Lisa; Sears, Justine
  Year: 2013
  Document Type: Paper
  Subject: Planning and Forecasting
  Session: 686
  Paper Number: 13-3089
• Empirical Investigation into Time Use and Activity Patterns of Dual-Earner Couples With and Without Young Children
  Abstract: This paper examines the time-use patterns of adults in dual-earner households with and without children as a function of several individual and household socio-demographics and employment characteristics. A disaggregate activity purpose classification including both in-home and out-of-home activity pursuits is used because of the travel demand relevance of out-of-home pursuits, as well as to examine both mobility-related and general time-use related social exclusion and time poverty issues. The study uses the Nested Multiple Discrete Continuous Extreme Value (MDCNEV) model to analyze data from the 2010 American Time Use Survey (ATUS). A major finding of the study is that the presence of a child in dual-earner households not only leads to a reduction in in-home activity participation, but also a substantially larger decrease in out-of-home activity participation, suggesting a higher level of mobility-related social exclusion relative to overall time-use social exclusion.
  Authors: Bernardo, Christina; Paleti, Rajesh; Hoklas, Megan; Bhat, Chandra R.
  Authors: Bernardo, Christina; Paleti, Rajesh; Hoklas, Megan; Bhat, Chandra R.
  Year: 2013
  Document Type: Paper
  Subject: Planning and Forecasting
  Session: 686
  Paper Number: 13-3868
• Random Regret and Random Utility in the Household Purchase of a Motor Vehicle
  Authors: Beck, Matthew
  Authors: Beck, Matthew
  Year: 2013
  Document Type: Presentation
  Subject: Planning and Forecasting
  Session: 686
  Paper Number: 13-0577
• Tour-Based Mode Choice of Joint Household Travel Patterns on Weekend and Weekday
  Authors: Ho, Chinh
  Authors: Ho, Chinh
  Year: 2013
  Document Type: Presentation
  Subject: Planning and Forecasting
  Session: 686
  Paper Number: 13-0609
• Modeling Uncertainty in Households' Activity Engagement Decisions
  Authors: Allahviranloo, Mahdieh
  Authors: Allahviranloo, Mahdieh
  Year: 2013
  Document Type: Presentation
  Subject: Planning and Forecasting
  Session: 686
  Paper Number: 13-2876
• Exploration of Intrahousehold Motorized Vehicle Allocation Using 2009 National Household Travel Survey
  Authors: Nam, Richard
  Authors: Nam, Richard
  Year: 2013
  Document Type: Presentation
  Subject: Planning and Forecasting
  Session: 686
  Paper Number: 13-3089
• Empirical Investigation into Time Use and Activity Patterns of Dual-Earner Couples With and Without Young Children
  Authors: Bernardo, Christina
  Authors: Bernardo, Christina
  Year: 2013
  Document Type: Presentation
  Subject: Planning and Forecasting
  Session: 686
  Paper Number: 13-3868