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Public Transport

, Volume 9, Issue 1–2, pp 285–305 | Cite as

Schedule-free high-frequency transit operations

  • Gabriel E. Sánchez-Martínez
  • Nigel H. M. Wilson
  • Haris N. Koutsopoulos
Original Paper

Abstract

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.

Keywords

High-frequency transit Schedule-free Real-time control 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Gabriel E. Sánchez-Martínez
    • 1
  • Nigel H. M. Wilson
    • 2
  • Haris N. Koutsopoulos
    • 3
  1. 1.CambridgeUSA
  2. 2.CambridgeUSA
  3. 3.BostonUSA

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