A Framework for Joint Modeling of Travel Time Use and Its Productivity

Understanding how people occupy time spent travelling and how productive they are while travelling has become increasingly important questions for travel behaviour research, with implications for the valuation of travel time savings, the design and use of on-board connectivity Information and Communication Technologies (ICT), and developments in connected and autonomous vehicles (CAV). However, to date no consensus has emerged regarding how travel time use should be modelled. To address this gap, the authors draw on their earlier efforts and create a unified framework grounded in the microeconomic theory, and operationalised using copulas linking discrete choice model of activity choice, hazard model for activity duration, and log-linear model of reported productivity. To the best of the authors' knowledge, this is the first framework which not only enables capturing effects of different factors on activity choice, duration, and productivity, but also models links between these aspects of behaviour, has convenient interpretation of the estimated parameters, and can be used in an inverse form to forecast travel time use and productivity. The authors estimate the model using data from the 2008 UK Study of Productive Use of Rail Travel- time. Hence they find that activity choice, duration, and productivity can be all influenced in different ways by journey-, respondent-, attitude-, and ICT-related factors. While the empirical findings are limited by the context-specificity and survey design, the authors note wide applicability of the framework, including valuation of travel time savings and investment appraisal, understanding the demand for on-board use of ICT and connectivity, understanding economic and social implications of vehicle automation resulting from conversion of driving time into other activities, optimise vehicle design for specific customer segments and their desired productivity and well-being objectives, or guiding employers and corporate travel agents to deliver travel arrangements maximising their mobile workforce performance.

• Supplemental Notes:
  • This paper was sponsored by TRB committee ADD20 Standing Committee on Social and Economic Factors of Transportation. Alternate title: Framework for Joint Modeling of Travel Time Use and Its Productivity
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Pawlak, Jacek
  • Polak, John W
  • Sivakumar, Aruna
• Conference:
  • Transportation Research Board 96th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2017-1-8 to 2017-1-12
• Date: 2017

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 21p
• Monograph Title: TRB 96th Annual Meeting Compendium of Papers

Subject/Index Terms

• TRT Terms: Activity choices; Intelligent vehicles; Microeconomics; Mobile communication systems; Personal communication devices; Productivity; Telecommunications; Travel time; Value of time
• Candidate Terms: Copula-based models
• Geographic Terms: United Kingdom
• Subject Areas: Data and Information Technology; Highways; Planning and Forecasting;

Filing Info

• Accession Number: 01626201
• Record Type: Publication
• Report/Paper Numbers: 17-00554
• Files: TRIS, TRB, ATRI
• Created Date: Feb 17 2017 1:56PM