20 citations · 65 across the 15 of their papers we have counts for
10 papers · 1 filter
Autonomous Minibus Service with Semi-on-demand Routes in Grid Networks
Max T. M. Ng, Hani S. Mahmassani
This paper investigates the potential of autonomous minibuses which take on-demand directional routes for pick-up and drop-off in a grid network of wider area with low density, fol…
How Well Did U.S. Rail and Intermodal Freight Respond to the COVID-19 Pandemic vs. the Great Recession?
Max T. M. Ng, Joseph Schofer, Hani S. Mahmassani
This paper analyzes and compares patterns of U.S. domestic rail freight volumes during, and after the disruptions caused by the 2007-2009 Great Recession and the COVID-19 pandemic…
Econometric Analysis of Pandemic Disruption and Recovery Trajectory in the U.S. Rail Freight Industry
Max T. M. Ng, Hani S. Mahmassani, Joseph L. Schofer
To measure the impacts on U.S. rail and intermodal freight by economic disruptions of the 2007-09 Great Recession and the COVID-19 pandemic, this paper uses time series analysis wi…
Highway Managed Lane Usage and Tolling for Mixed Traffic Flows with Connected Automated Vehicles (CAVs) and High-Occupancy Vehicles (HOVs)
Max T. M. Ng, Hani S. Mahmassani
This paper investigates managed lane (ML) toll setting and its effect under mixed traffic of connected automated vehicles (CAVs), high-occupancy vehicles (HOVs), and human-driven v…
Trading Off Energy Storage and Payload -- An Analytical Model for Freight Train Configuration
Max T. M. Ng, Adrian Hernandez, Pablo L. Durango-Cohen +1
To support planning of alternative fuel technology (e.g., battery-electric locomotives) deployment for decarbonizing non-electrified freight rail, we develop a convex optimization…
Joint Optimization of Multimodal Transit Frequency and Shared Autonomous Vehicle Fleet Size with Hybrid Metaheuristic and Nonlinear Programming
Max T. M. Ng, Hani S. Mahmassani, Draco Tong +2
Shared autonomous vehicles (SAVs) bring competition to traditional transit services but redesigning multimodal transit network can utilize SAVs as feeders to enhance service effici…
Vehicle Rebalancing Under Adherence Uncertainty
Avalpreet Singh Brar, Rong Su, Christos G. Cassandras +3
Ride-hailing platforms frequently face spatiotemporal supply-demand imbalances caused by uneven passenger demand and decentralized driver decision-making. Existing vehicle rebalanc…
Joint Optimization of Pattern, Headway, and Fleet Size of Multiple Urban Transit Lines with Perceived Headway Consideration and Passenger Flow Allocation
Max T. M. Ng, Draco Tong, Hani S. Mahmassani +2
This study addresses the urban transit pattern design problem, optimizing stop sequences, headways, and fleet sizes across multiple routes and periods simultaneously to minimize us…
Semi-on-Demand Off-Peak Transit Services with Shared Autonomous Vehicles -- Service Planning, Simulation, and Analysis in Munich, Germany
Max T. M. Ng, Roman Engelhardt, Florian Dandl +3
This study investigates the implementation of semi-on-demand (SoD) hybrid-route services using Shared Autonomous Vehicles (SAVs) on existing transit lines. SoD services combine the…
Semi-on-Demand Hybrid Transit Route Design with Shared Autonomous Mobility Services
Max T. M. Ng, Florian Dandl, Hani S. Mahmassani +1
Shared Autonomous Vehicles (SAVs) enable transit agencies to design more agile and responsive services at lower operating costs. This study designs and evaluates a semi-on-demand h…