Schedule-free high-frequency transit operations
Author(s)Koutsopoulos, Haris N.; Sanchez-Martinez, Gabriel E; Wilson, Nigel H. M.
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High-frequency transit systems are essential for the socioeconomic and environmental well-being of large and dense cities. The planning and control of their operations are important determinants of service quality. Although headway and optimization-based control strategies generally outperform schedule-adherence strategies, high-frequency operations are mostly planned with schedules, in part because operators must observe resource constraints (neglected by most control strategies) while planning and delivering service. This research develops a schedule-free paradigm for high-frequency transit operations, in which trip sequences and departure times are optimized in real-time, employing stop-skipping strategies and utilizing real-time information to maximize service quality while satisfying operator resource constraints. Following a discussion of possible methodological approaches, a simple methodology is applied to operate a simulated transit service without schedules. Results demonstrate the feasibility of the new paradigm.
DepartmentMassachusetts Institute of Technology. Center for Transportation & Logistics
Springer Berlin Heidelberg
Sánchez-Martínez, Gabriel E., Nigel H. M. Wilson, and Haris N. Koutsopoulos. “Schedule-Free High-Frequency Transit Operations.” Public Transport 9.1–2 (2017): 285–305.
Author's final manuscript