Robust rescheduling and holding of autonomous buses intertwined with collector transit lines

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Abstract

The use of autonomous buses increases, and their operations increasingly intertwine with other public transport lines. At the same time, the use of autonomous buses in a mixed traffic environment induces new challenges with respect to their service synchronization with other lines. In fact, due to their cautious driving behavior in a mixed environment, the operations of autonomous buses show a high degree of variation in inter-station travel times, which leads to many unsuccessful transfers. Many tactical planning problems, however, naively assume that this uncertainty can be reduced to a single deterministic value (e.g., a travel time expectation). In this study, we propose a technique to find a robust schedule of dispatching and holding times that incorporates the inherent uncertainty in the operations. We discuss the complexity and applicability of such robust problems in public transit operations in general, and solve the optimization problem for an autonomous bus system that serves as a feeder line to a collector line. The numerical experiments show that the robust rescheduling and holding solution is resilient to variations in travel times: the operations maintain a high level of service regularity and avoid missed passenger transfers even under extreme scenarios.

Original languageEnglish
Title of host publication2020 IEEE 23rd International Conference on Intelligent Transportation Systems, ITSC 2020
PublisherIEEE
Pages1-7
Number of pages7
ISBN (Electronic)978-1-7281-4149-7
ISBN (Print)978-1-7281-4150-3
DOIs
Publication statusPublished - 20 Sep 2020
Event23rd IEEE International Conference on Intelligent Transportation Systems, ITSC 2020 - Virtual Conference, Greece
Duration: 20 Sep 202023 Sep 2020
Conference number: 23

Conference

Conference23rd IEEE International Conference on Intelligent Transportation Systems, ITSC 2020
Abbreviated titleITSC 2020
CountryGreece
CityVirtual Conference
Period20/09/2023/09/20

Keywords

  • autonomous buses
  • bus line synchronization
  • rescheduling and holding
  • robust optimization
  • semi-infinite programming

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