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Economic Analysis of Curb Parking with Urban Delivery


Speaker:

Prof. Zhengtian Xu

Department of Civil and Environmental Engineering, George Washington University, USA

Date:    Aug 19, 2024 (Monday)

Time:   5:00pm – 6:00pm

Venue:  Room 612B, 6/F Haking Wong Building, The University of Hong Kong


Abstract

The surge in online shopping has dramatically increased the demand for short-term curb access for package pickups and deliveries, leading to heightened competition for limited curb space. This talk addresses how the unique parking demand of deliverers, particularly their endogenous parking durations, affects the dynamics of urban curb parking systems. Continuum models of curb parking systems are developed, and analytical analyses are performed to understand the system dynamics and steady-state properties under the influence of increased urban deliveries. Theoretical capacity of three prevalent curb management strategies, including pricing, parking duration caps, and dedicated delivery bays, are examined and compared. Our findings offer valuable insights into the unique properties that deliverers introduce to curb parking dynamics, highlighting the need for a strategic reevaluation of status-quo managerial measures.


About the Speaker

Dr. Zhengtian Xu is an Assistant Professor in the Department of Civil and Environmental Engineering at George Washington University and directs the Sustainable Urban Mobility Lab. His research focuses on developing novel models, tools, and data-driven quantitative analyses to understand, enhance, and regulate urban mobility systems and services. Dr. Xu’s work has been featured in leading transportation research journals, including Transportation Research Part B/C and Transportation Science. Notably, one of his papers received the Stella Dafermos Best Paper Award and the Ryuichi Kitamura Paper Award at the Transportation Research Board’s 95th Annual Meeting. His doctoral dissertation, which addressed the critical issues of empty miles in app-based ride-hailing services, was recognized with the TSL Dissertation Award from INFORMS and the HKSTS Outstanding Dissertation Award with the Gordon Newell Memorial Prize from the Hong Kong Society for Transportation Studies. He is currently guest editing a special issue on “the Economics of Platform-Based Mobility and Logistics Services” at Transportation Research Part C. Dr. Xu earned his Ph.D. from the University of Michigan in 2020, his M.S. from the University of Florida in 2016, and his B.S. from Tsinghua University, China, in 2014.

 

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Expected Bipartite Matching Distance in An L^p Space: Approximate Closed-form Formulas and Applications to On-Demand Shared Mobility Services


Speaker:

Prof. Yanfeng Ouyang

Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, USA

Date:    July 22, 2024 (Monday)

Time:   4:00pm – 5:00pm

Venue:  Room 612B, 6/F Haking Wong Building, The University of Hong Kong


Abstract

In this talk, we discuss how strategic performance evaluation and resource planning of shared mobility services can benefit from new closed-form formulas that estimate the expected distances from a random bipartite matching problem in a D-dimensional L^p space. Asymptotic approximations of the formulas are also developed for some special cases. These formulas provide a theoretical foundation for taxi matching functions in the literature, and also reveal conditions under which the matching function will be most suitable. These formulas can also be easily incorporated into optimization models to select taxi operation strategies; e.g., whether newly arriving customers shall be instantly matched or pooled into a batch for matching. Agent-based simulations are also conducted to verify the predicted performance of the demand pooling strategy for two types of e-hailing taxi systems.


About the Speaker

Yanfeng Ouyang is George Krambles Professor, Paul Kent Faculty Scholar, and Donald Willett Faculty Scholar at the University of Illinois, Urbana-Champaign (UIUC). He is also Associate Director for Mobility of the Illinois Center for Transportation.  His work mainly focuses on planning, operations, and control of complex transportation and logistics systems. He currently serves (or previously served) as a Department/Area/Associate/Board Editor of IISE Transactions, Networks and Spatial Economics, Transportation Science, Transportation Research Part B, Transportation Research Part C, and Transportmetrica B. He is also Chair of TRB’s AEP40 Committee on Transportation Network Modeling. His work has been recognized by a Merit Award for Technical Study from the American Planning Association, a Walter L. Huber Research Prize from the American Society of Civil Engineers, a High Impact Project Award from the Illinois Department of Transportation, a Faculty Early Career Development (CAREER) Award from the U.S. National Science Foundation, among others.

 

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