April 23, 2021


On the Empty Miles in Ridesourcing Systems


1:40pm - 3:00pm


Remote instruction


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.

Biographical Sketch

Dr. Yafeng Yin is a Professor of Civil and Environmental Engineering and a Professor of Industrial and Operations Engineering at University of Michigan, Ann Arbor. He works in the area of transportation systems analysis and modeling, and has published more than 120 refereed papers in leading academic journals. His current research focuses on connected and automated mobility systems.

Dr. Yin has extensive experience in editing academic journals. He now 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 2016 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 University of Florida between 2005 and 2016, a postdoctoral researcher and then assistant research engineer at 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 a Doctoral Mentoring Award from University of Florida, 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.


Yafeng Yin, Professor of Civil and Environmental Engineering, Professor of Industrial and Operations Engineering, University of Michigan, Ann Arbor, “On the Empty Miles in Ridesourcing Systems” do not post recorded seminar

Thank you for your interest in the UC Davis Institute of Transportation Studies. Subscribe today to keep up with the latest ITS news and happenings.

Join Our Mailing List