Event Calendar
Upcoming Event
NUTC Seminar Series: "Pricing ride-hailing in Chicago: Can ride-hailing become more of a complement and less of a competitor to transit?" - Greg Erhardt, University of Kentucky
Northwestern University Transportation Center
4:00 PM
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Ruan Conference Center, Chambers Hall
Details
Abstract:
Past literature has explored the degree to which ride-hailing complements or competes with public transit. The evidence suggests that while individual trips sometimes do connect to transit or occur in areas or not well served by transit, ride-hailing trips are most concentrated in the densest parts of urban areas where transit service is good. The result is a shift from transit to ride-hailing, adding congestion to the roads that are most congested already. This talk presents two studies exploring how we might counteract that effect through pricing.
The first evaluates Chicago's Ground Transportation Tax (GTT) update of January 6, 2020, which increased fees on solo rides and all downtown ride-hailing between 6am and 10pm. Using a novel policy-sensitive direct ridership model estimated on open data before and after the GTT update, we measure the effect of the pricing change on ride-hailing volume, mode choice, and ride-sharing behavior across Chicago census tracts.
The second study proposes and evaluates a revenue pricing scheme in which per-trip taxes on transit-competitive rides are used to subsidize rides that serve areas or times with limited transit access. Applied over a full day, the scheme would diminish transit competition, reduced vehicle miles traveled, andreduces passenger cost — providing the potential to shift ride-hailing from transit competitor to complement.
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 earned an MS in Civil Engineering from Northwestern in 2002. The first study was co-authored with Richard Alexander Mucci at the University of Kentucky, and the second with Zhihua Jin, Rolf Moeckel and Allister Loder at Technical University of Munich.
Time
Thursday, October 22, 2026 at 4:00 PM - 5:00 PM
Location
Ruan Conference Center, Chambers Hall Map
Contact
Calendar
Northwestern University Transportation Center
National Manufacturing Day at Northwestern University
Northwestern Initiative for Manufacturing Science and Innovation
8:15 AM
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2001 Sheridan Road
Details
Manufacturing with Embodied AI
Celebrating manufacturing-related R&D achievements and their business impacts on National Manufacturing Day!
Leadership Remarks
-Northwestern University President Mung Chiang
-National Center for Manufacturing Sciences President and CEO Lisa Strama
-Northwestern University Provost Erik Luijten
Corporate Panel, Stan Rendon, 3M VP of R&D, Yu Cao, Applied Materials Chief AI Officer and Amey Deosthali, AMD Head of Robotics, Industrial & Healthcare (Physical AI)
NU Faculty Panel, Prof. Jian Cao, Prof. Ed Colgate, Prof. Mark Hersam, Prof. John Rogers
Founders/SME Panel, Jason Sebastian, Executive VP QuesTek Innovation, Demeng Che, co-Founder & CEO Converge Lab, Gino Domel, CEO HiDeNN-AI, Joe Mullenbach, co-founder Fluid Reality
Ecosystems Panel, Tom Kurfess, CTO, NCMS & Executive Director of Mfg Institute at Georgia Tech, Berardino Baratta, CEO MxD, Allison Fisher, Chief of Staff mHUB
Time
Friday, October 2, 2026 at 8:15 AM - 5:00 PM
Location
2001 Sheridan Road Map
Contact
Calendar
Northwestern Initiative for Manufacturing Science and Innovation
NUTC Seminar Series: "Human Mobility Beyond Aggregate Patterns"-Jürgen Hackl, Princeton University
Northwestern University Transportation Center
4:00 PM
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Ruan Conference Center, Chambers Hall
Details
Abstract:
Human mobility is often described through aggregate quantities such as origin-destination flows, travel distances, or traffic volumes. While these representations reveal important regularities, they can obscure how individuals actually move through transportation networks: the paths they take, how previous movements shape subsequent decisions, and how behavior varies across people and environments. In this talk, I will present recent work that shifts the focus from aggregate mobility patterns toward the structure and heterogeneity of individual movement. Drawing on empirical GPS data, agent-based simulations, and higher-order network models, we investigate how sequential dependencies shape mobility and its predictability, how faithfully commonly used benchmarks and synthetic populations reproduce observed human movement, and how mobility behavior changes across different built environments. Across these studies, a common picture emerges: systems that appear remarkably similar at an aggregate level can differ substantially in their path structure, behavioral diversity, and predictability. These findings highlight the opportunities offered by emerging mobility data and simulation models and motivate new network-based approaches for understanding, predicting, and designing transportation systems that better reflect how people actually move.
Bio:
Dr. Jürgen Hackl is an Assistant Professor of Civil and Environmental Engineering at Princeton University, where he leads the Complex Infrastructure Systems group. His research lies at the intersection of network science, transportation, and infrastructure systems, with a particular focus on human mobility, spatial-temporal and higher-order networks, uncertainty quantification, and data-driven modeling of complex systems. His work develops new methods to understand how people, information, and resources move through infrastructure networks and how these dynamics can be represented, predicted, and incorporated into simulation and decision-making.
He received his PhD from ETH Zürich in 2019 and subsequently held research and faculty positions at the University of Zürich, the University of Liverpool, and the University of Cambridge before joining Princeton in 2023. His research spans transportation, power, and urban infrastructure systems and combines methodological advances in network science with applications to the analysis, design, and resilience of complex engineered systems.
Time
Thursday, October 8, 2026 at 4:00 PM - 5:00 PM
Location
Ruan Conference Center, Chambers Hall Map
Contact
Calendar
Northwestern University Transportation Center
NUTC Sandhouse Rail Group: "Modeling Enhanced Regional Rail Service on Metra" - Stephen Walsh, Northwestern
Northwestern University Transportation Center
4:00 PM
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Chambers Hall
Details
Co-sponsored Event with the TC Seminar Series.
Presenters: Stephen Walsh (Civil Engineering and Transportation and Logistics Minor) and Ian Savage (Professor of Economics and Transportation)
Abstract:
Should Metra offer enhanced off-peak service as part of a “regional rail” concept? If so, should the enhanced frequencies apply on the entire length of each line or just for a shorter inner portion? If the enhanced frequencies are on just part of a line, where should the additional trains turn around? What enhanced frequencies should be offered? This presentation describes recent research that models the number of trainsets required for different combinations of frequency and turn-around point. It also describes earlier research on which stations show the most promise for enhanced off-peak operations. This event is meant to be an interactive discussion where information on costs and demand are an input to thinking about the nature of any regional rail offerings in Northeastern Illinois.
Bios:
Stephen Walsh is an undergraduate student in Civil Engineering at Northwestern University with a minor in Transportation and Logistics. Ian Savage is a longtime affiliated Transportation Center faculty member and a Professor of Instruction in Economics.
Time
Thursday, October 15, 2026 at 4:00 PM - 5:00 PM
Location
Chambers Hall Map
Contact
Calendar
Northwestern University Transportation Center
NUTC Seminar Series: Sikai Chen, University of Wisconsin-Madison
Northwestern University Transportation Center
4:00 PM
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Ruan Conference Center, Chambers Hall
Details
Time
Thursday, October 29, 2026 at 4:00 PM - 5:00 PM
Location
Ruan Conference Center, Chambers Hall Map
Contact
Calendar
Northwestern University Transportation Center
NUTC Seminar Series: "From Discovery to Design: Engineering Microbial Communities for Health and Sustainability" - Erica Hartmann, Northwestern
Northwestern University Transportation Center
4:00 PM
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Ruan Conference Center, Chambers Hall
Details
Abstract:
Microbial communities underpin the health of humans, animals, and ecosystems, shaping our world and how we experience it. Conversely, microbes are also shaped by human activities, including the widespread use of antimicrobial chemicals. Understanding how microbial communities respond to these pressures is essential for mitigating antimicrobial resistance, protecting public health, and developing sustainable biotechnologies. Drawing on studies spanning hospitals, homes, wastewater treatment systems, and host-associated microbiomes, this talk will explore how microbial ecology can reveal the mechanisms by which microbes adapt, survive, and evolve in complex real-world environments.
I will present recent work investigating the fate and impacts of antimicrobial chemicals in built and natural environments, highlighting how chemical exposures reshape microbial community structure and select for resistant organisms. These studies demonstrate the value of integrating analytical chemistry, cultivation-based microbiology, genomic approaches, and ecological theory to uncover microbial processes that are often hidden in laboratory model systems.
Building on these discoveries, I will discuss efforts to develop evidence-based policy and ecology-informed strategies for microbial control and microbiome engineering. The latter include advancing bacteriophage-based therapeutics for difficult-to-treat infections and engineering phage and microbial communities for applications ranging from human health to energy-efficient wastewater treatment. Together, these projects illustrate how a mechanistic understanding of microbial ecology can be translated into innovative interventions that move beyond conventional antimicrobial approaches.
By connecting fundamental questions in microbial ecology and evolution with applied challenges in medicine, the built environment, and environmental biotechnology, this work transforms our ability to predict, manipulate, and design microbial communities for healthier and more sustainable futures.
Bio:
Dr. Erica Marie Hartmann is an environmental microbiologist interested in the interaction between anthropogenic chemicals and microorganisms, as well as bio-inspired mechanisms for controlling microbial communities. Her career began at the Johns Hopkins Bloomberg School of Public Health. She then moved to Arizona State University where she was the first graduate of the interdisciplinary Biological Design PhD program. She had two postdoctoral positions, the first, supported by a Fulbright, at the Commission for Atomic Energy in France. She began leading studies on antimicrobial chemicals and microbes found in indoor dust during her second postdoc at the Biology and the Built Environment Center at the University of Oregon. She is currently an associate professor at Northwestern University in the department of Civil and Environmental Engineering, with affiliations in Pulmonary Medicine and the Center for Synthetic Biology. She was awarded an NSF CAREER to support her work on antimicrobial textiles and is leading an investigation of the respiratory tract microbiome in the NIH-funded Successful Clinical Response In Pneumonia Therapy (SCRIPT) Systems Biology Center. She is further designing new antimicrobial strategies based on bacteriophages.
Time
Thursday, November 12, 2026 at 4:00 PM - 5:00 PM
Location
Ruan Conference Center, Chambers Hall Map
Contact
Calendar
Northwestern University Transportation Center
NUTC Seminar Series: Amanda Stathopolous, Northwestern
Northwestern University Transportation Center
4:00 PM
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Ruan Conference Center, Chambers Hall
Details
Time
Thursday, November 12, 2026 at 4:00 PM - 5:00 PM
Location
Ruan Conference Center, Chambers Hall Map
Contact
Calendar
Northwestern University Transportation Center
NUTC Seminar Series: "Multimodal Freight Facility Simulation Analysis" - Cal Skiles, Northwestern
Northwestern University Transportation Center
4:00 PM
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Ruan Conference Center, Chambers Hall
Details
Time
Thursday, November 19, 2026 at 4:00 PM - 5:00 PM
Location
Ruan Conference Center, Chambers Hall Map
Contact
Calendar
Northwestern University Transportation Center
Northwestern Engineering PhD Hooding and Master's Recognition Ceremony
McCormick School of Engineering and Applied Science
4:00 PM
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Pick-Staiger Concert Hall
Details
The ceremony will take place on Saturday, December 12 in Pick-Staiger Concert Hall, 50 Arts Circle Drive.
Time
Saturday, December 12, 2026 at 4:00 PM - 6:00 PM
Location
Pick-Staiger Concert Hall Map
Contact
Calendar
McCormick School of Engineering and Applied Science