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On the Empty Miles in Ridesourcing Systems

Distinguished Research Seminar Series

20220419_Yafeng Yin_Event Banner
  • Date

    19 Apr 2022

  • Organiser

    Department of Industrial and Systems Engineering, PolyU

  • Time

    09:00 - 10:20

  • Venue

    Online via ZOOM  


Prof. Yafeng Yin


Meeting link will be sent to successful registrants

20220419_Yafeng Yin_Poster


Ridesourcing services provided by companies like Uber, Lyft, and Didi Chuxing are playing an increasingly important role in meeting mobility needs in many metropolitan areas. Other than delivering passengers from their origin to destination, ridesourcing vehicles generate massive vacant or empty trips from the end of one passenger trip to the start of the next. These vacant trips represent unproductive use of labor supply. They also contribute additional traffic demand and may worsen the traffic conditions in urban networks. In this talk, we will discuss the factors impacting the number of empty miles in a ridesourcing system, and explore countermeasures to reduce empty miles in the system. Lastly, we introduce the modeling of ridesourcing services to estimate empty miles and capture their impacts on traffic congestion.

Keynote Speaker

Prof. Yafeng Yin

Prof. Yafeng Yin

Professor of Civil and Environmental Engineering
Professor of Industrial and Operations Engineering
University of Michigan
Ann Arbor


Dr. Yafeng Yin is a Professor of Civil and Environmental Engineering and a Professor of Industrial and Operations Engineering at the University of Michigan, Ann Arbor. He works in the area of transportation systems analysis and modeling and has published more than 130 refereed papers in leading academic journals. His current research focuses on connected and automated mobility systems. He currently serves as Area Editor of Transportation Science, Associate Editor of Transportation Research Part B: Methodology, and Department Editor of Service Science and was the Editor-in-Chief of Transportation Research Part C: Emerging Technologies between 2014 and 2020. Dr. Yin received his Ph.D. from the University of Tokyo, Japan in 2002, his master’s and bachelor’s degrees from Tsinghua University, Beijing, China in 1996 and 1994 respectively. Prior to his current appointment at the University of Michigan, he was a faculty member at the University of Florida between 2005 and 2016, a postdoctoral researcher, and then assistant research engineer at the University of California at Berkeley between 2002 and 2005. Between 1996 and 1999, he was a lecturer at Tsinghua University. Dr. Yin has received recognition from different institutions, including the Monroe-Brown Foundation Education Excellence Award from the University of Michigan, a Doctoral Mentoring Award from the University of Florida, the Outstanding Leadership Award by the Chinese Overseas Transportation Association (COTA), and the Stella Dafermos Best Paper Award and the Ryuichi Kitamura Paper Award from Transportation Research Board.    

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