Event Calendar
Past Event
NUTC Seminar Series - "Shared Mobility Services: From System Analysis to Management" - Hongyu Zheng | Northwestern University | April 4
Northwestern University Transportation Center
4:00 PM
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Ruan Conference Room, Chambers Hall
Details
Hongyu Zheng
PhD Candidate
Northwestern University
Abstract:
In recent years, shared mobility service (SMoS) systems have emerged as a driving force behind transportation innovations. By better leveraging existing transportation facilities and resources through collaborative usage, SMoS systems promise to enhance accessibility, promote sustainability, and reduce transportation costs. Effective resource sharing requires not only compatible business models and sensible policy initiatives, but also analytical and computational tools that support design and operational decisions. At present, however, these institutional and technological apparatus remain in their infancy. The rise and fall of dockless bike-sharing in China offered a cautionary tale of the delicacy and complexity in SMoS systems, as well as the peril of leaving their development completely to unregulated markets. Partly inspired by this saga, in this presentation, I will address two design and regulation questions – why the market fails at its early stage and how the governor can regulate the market to make it sustainable – through developing and analyzing a stylized model.
Bio:
Hongyu Zheng is a Ph.D. candidate in Transportation System Analysis and Planning at Northwestern University, advised by Prof. Yu (Marco) Nie. Prior to joining Northwestern, Hongyu obtained an M.S. degree with honor in Transportation and a B.E. degree in Civil Engineering, both from Zhejiang University (ZJU). Hongyu was awarded the National Scholarship multiple times throughout his time at ZJU. Recently, he received the Bob Camillone Memorial Scholarship from ASCE Transportation & Development Institute, as well as the Transportation Center Dissertation Year Fellowship from Northwestern University. Hongyu’s research focuses on shared mobility, transportation automation, and electrification. Drawing tools and knowledge from transportation science, game theory, operations research, and machine learning, he aims to build an efficient, sustainable, and equitable urban transportation system that benefits everyone.
Time
Thursday, April 4, 2024 at 4:00 PM - 5:00 PM
Location
Ruan Conference Room, Chambers Hall Map
Contact
Calendar
Northwestern University Transportation Center
POSTPONED!!! NUTC Seminar Series: "Modeling Ride-Hailing Demand for Pricing and Planning" | Greg Erhardt | University of Kentucky
Northwestern University Transportation Center
4:00 PM
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Ruan Conference Center, Chambers Hall
Details
Abstract:
Despite its emergence as an important urban travel mode, Chicago is among only a handful of cities with access to data on all ride-hailing trips that occur in their city. This lack of data limits our understanding of the effects of ride-hailing and the effectiveness of strategies that cities can use to manage those effects. In this research, we use Chicago’s data in combination with other open data to estimate a direct-ridership model of ride-hailing trips between each Census tract pair. We apply the model to two case studies:
1. We evaluate the effect of Chicago’s ride-hailing Traffic Congestion Mitigation (TCM) Tax that went into effect in January 2020.
2. After testing the model out-of-sample and comparing to publicly available ride-hailing data for cities in Massachusetts, we apply the model to estimate the ride-hailing trips in every Census tract in Kentucky and the sensitivity to price changes. This application provides an order-of-magnitude estimate for planners interested in understanding the potential for automated vehicle passenger services in rural Kentucky.
In ongoing work, we consider strategies for ride-hailing pricing schemes that would price trips that compete with transit and subsidize those that complement it.
Bio:
Greg Erhardt is a Raymond-Blythe Associate Professor of Civil Engineering at the University of Kentucky, a Hans Fischer Fellow at the Institute for Advanced Study, Technical University of Munich, and a Senior Advisor to Bay Area Metro. He brings more than 20 years of experience in both research and practice developing and applying metropolitan and statewide travel demand models. Dr. Erhardt is the recipient of the 2023 Zephyr Foundation Leadership Award, and his research on ride-hailing has been covered in publications including the Boston Globe, the Economist and NPR’s Science Friday. He is a 2001 MS graduate in Civil Engineering from Northwestern University.
Time
Thursday, February 13, 2025 at 4:00 PM - 5:00 PM
Location
Ruan Conference Center, Chambers Hall Map
Contact
Calendar
Northwestern University Transportation Center
NUTC Seminar Series: Soyoung Ahn | University of Wisconsin-Madison
Northwestern University Transportation Center
4:00 PM
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Ruan Conference Center, Chambers Hall
Details
Abstract
Car following (CF) models are fundamental to describing traffic dynamics. However, the CF behavior of human drivers is highly stochastic and nonlinear. As a result, identifying the “best” CF model has been challenging and controversial despite decades of research. Introduction of automated vehicles has further complicated this matter as their CF controllers remain proprietary. This talk will discuss a stochastic learning approach to integrate multiple CF models, rather than relying on a single model. The framework is based on approximate Bayesian computation that probabilistically concatenates a pool of CF models based on their relative likelihood of describing observed behavior. The approach, while data-driven, retains physical tractability and interpretability.
Bio
Soyoung (Sue) Ahn is a Professor in the Department of Civil and Environmental Engineering at the University of Wisconsin-Madison (UW-Madison). Her research interest lies in analysis and modeling of human-driven and connected automated vehicle flow. Her recent research involves 1) understanding human-automated vehicle interactions, 2) linking those interactions to traffic-level phenomena, and 3) applying this knowledge to develop automated vehicle and traffic control strategies. Her group has received several best paper awards, most recently D. Grant Mickle Award, Best Paper on Operation and Maintenance of Transportation Facilities, given by Transportation Research Board. Ahn is a chair of the Operations Section for the Transportation Research Board (TRB) and an elected member of the International Advisory Committee for the International Symposium on Traffic and Transportation Theory.
Time
Thursday, February 27, 2025 at 4:00 PM - 5:00 PM
Location
Ruan Conference Center, Chambers Hall Map
Contact
Calendar
Northwestern University Transportation Center
Winter exams begin
University Academic Calendar
All Day
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Winter exams begin
Time
Monday, March 17, 2025
Contact
Calendar
University Academic Calendar
Spring Break Begins
University Academic Calendar
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Spring Break Begins
Time
Saturday, March 22, 2025
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University Academic Calendar
Spring Break Ends
University Academic Calendar
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Spring Break Ends
Time
Monday, March 31, 2025
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University Academic Calendar
2024-2025 Commencement Ceremony
University Academic Calendar
All Day
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2024-2025 Commencement Ceremony
Time
Sunday, June 15, 2025
Contact
Calendar
University Academic Calendar
Northwestern Engineering PhD Hooding and Master's Degree Recognition Ceremony
McCormick School of Engineering and Applied Science
9:00 AM
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2705 Ashland Ave
Details
McCormick School of Engineering PhD Hooding and Master's Degree Recognition Ceremony. The most up to date information can be found on our graduation webpage.
Time
Monday, June 16, 2025 at 9:00 AM - 11:00 AM
Location
2705 Ashland Ave
Contact
Calendar
McCormick School of Engineering and Applied Science
Northwestern Engineering Undergraduate Convocation
McCormick School of Engineering and Applied Science
2:00 PM
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2705 Ashland Ave
Details
McCormick School of Engineering Undergraduate Convocation. The most up to date information can be found on our graduation webpage.
Time
Monday, June 16, 2025 at 2:00 PM - 4:00 PM
Location
2705 Ashland Ave
Contact
Calendar
McCormick School of Engineering and Applied Science
2025 ITEA Summer School
Northwestern University Transportation Center
All Day
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Ruan Conference Center, Lower Level, Chambers Hall
Details

The aim of the ITEA Annual School is to provide young researchers with a high-quality introduction to academic research on transportation economics, including many recent advances in the field. The School’s program consists of a series of lectures and tutorials conducted by some of the most prominent researchers in transportation economics. In addition, the students are given the possibility to present their own work at the Conference.
Time
Monday, June 23, 2025
Location
Ruan Conference Center, Lower Level, Chambers Hall Map
Contact
Calendar
Northwestern University Transportation Center
2025 ITEA Summer School
Northwestern University Transportation Center
All Day
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Ruan Conference Center, Lower Level, Chambers Hall
Details

The aim of the ITEA Annual School is to provide young researchers with a high-quality introduction to academic research on transportation economics, including many recent advances in the field. The School’s program consists of a series of lectures and tutorials conducted by some of the most prominent researchers in transportation economics. In addition, the students are given the possibility to present their own work at the Conference.
Time
Tuesday, June 24, 2025
Location
Ruan Conference Center, Lower Level, Chambers Hall Map
Contact
Calendar
Northwestern University Transportation Center
2025 ITEA Summer School
Northwestern University Transportation Center
All Day
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Ruan Conference Center, Lower Level, Chambers Hall
Details

The aim of the ITEA Annual School is to provide young researchers with a high-quality introduction to academic research on transportation economics, including many recent advances in the field. The School’s program consists of a series of lectures and tutorials conducted by some of the most prominent researchers in transportation economics. In addition, the students are given the possibility to present their own work at the Conference.
Time
Wednesday, June 25, 2025
Location
Ruan Conference Center, Lower Level, Chambers Hall Map
Contact
Calendar
Northwestern University Transportation Center
2025 ITEA Annual Conference
Northwestern University Transportation Center
All Day
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Kellogg Global Hub
Details

The aim of the ITEA Annual Conference is to promote scientific excellence in the field of transportation economics and to provide a forum for scientific exchange. Research presented at the conference covers both theory and empirical work, including all transport modes and a wide range of research methodologies.
Time
Wednesday, June 25, 2025
Location
Kellogg Global Hub Map
Contact
Calendar
Northwestern University Transportation Center
2025 ITEA Annual Conference
Northwestern University Transportation Center
All Day
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Kellogg Global Hub
Details

The aim of the ITEA Annual Conference is to promote scientific excellence in the field of transportation economics and to provide a forum for scientific exchange. Research presented at the conference covers both theory and empirical work, including all transport modes and a wide range of research methodologies.
Time
Thursday, June 26, 2025
Location
Kellogg Global Hub Map
Contact
Calendar
Northwestern University Transportation Center
2025 ITEA Annual Conference
Northwestern University Transportation Center
All Day
//
Kellogg Global Hub
Details

The aim of the ITEA Annual Conference is to promote scientific excellence in the field of transportation economics and to provide a forum for scientific exchange. Research presented at the conference covers both theory and empirical work, including all transport modes and a wide range of research methodologies.
Time
Friday, June 27, 2025
Location
Kellogg Global Hub Map
Contact
Calendar
Northwestern University Transportation Center