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Welcome to CTRF’s 60th Annual Conference! Enjoy Ottawa
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Network-wide transfer synchronization strategies in a public bus system with real-time data LIMITED
Monday May 26, 2025 12:10pm - 12:30pm EDT
Desmarais 3105
Transfer speed and reliability are key factors influencing public transportation use. Fixed schedules often fail under unpredictable traffic, causing missed transfers. To address this challenge, we propose an online stochastic optimization (OSO) framework for the real-time transfer synchronization problem using three control tactics: hold, skip-stop, and speedup. Our approach is based on an offline model that minimizes total passenger travel time by solving time-expanded graphs incorporating all possible control tactics. Building on this model, we develop two OSO algorithms integrating historical and real-time data to generate scenarios on future bus network conditions and make dynamic decisions. These algorithms were implemented in a network-scale simulator of the public transit system of Laval, Canada. The results demonstrate improvements in mean transfer time and in passenger travel times, showcasing the practical potential of using online stochastic optimization for transfer synchronization in multi-line public transit networks.
Speakers
avatar for Martin Trépanier

Martin Trépanier

Full Professor, Polytechnique Montréal and CIRRELT
Martin Trépanier is a civil engineer and professor at the department of mathematics and industrial engineering of École Polytechnique de Montréal, an engineering school affiliated to the Université de Montréal.  He is the titular of the Chair in the transformation of transportation... Read More →
LK

Laura Kolcheva

Polytechnique Montréal
24. Kolcheva Legrain Trepanier Paper CTRF2025 pdf
Monday May 26, 2025 12:10pm - 12:30pm EDT
Desmarais 3105 55 Laurier Ave E, Ottawa ON K1N 6N5
  How to catch a bus

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