How Regular Is A Regular-interval Timetable?
From Theory To Application
Author(s)
P. Tzieropoulos, D. Emery & D. Tron
Abstract
Initially, choice of regular-interval timetable was mostly addressing operational
concerns, aiming to increase the network throughput and to smooth the day-today
tasks of the personnel. Separation between infrastructure management and
train operations, induced by the European Union since the early 90s, and the
future opening of the rail services to competition, pushes more and more
infrastructure managers to operate their network with regular-interval timetable.
Thus, the interest of measuring the degree of regularity.
The paper defines the different steps needed for going from conventional
operations to fully coordinated regular-interval timetable (the so-called clockface
timetable). It starts by defining the basic notions, and shows some
fundamental properties of regular-based timetables. Then, based on the
definitions, a methodology is developed to measure and assess the regularity of a
timetable, for a line and over a full-scale network. This is because, in practice,
implementation of a perfectly regular timetable is not possible and, perhaps,
neither desirable. Constraints related to demand or to resources lead to cancel
train paths during off-peak periods or to provide extra stops or longer dwell
times (and thus slowing down travel time) during peak hours, for instance.
More specifically, the paper presents a methodology for determining the
interval used to evaluate and compare reference and actual timetables, per train
class and by corridors. Tolerances in measuring are dealt with. The developed
methodology has been used to develop assessment software, which has been
used in a real life application.
Keywords: regular-interval timetable, coordinated cycling timetable.
Keywords
regular-interval timetable, coordinated cycling timetable
Related Book
Other papers in this volume
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