Cyclic Timetable Improvement With
Train Traffic Data Analysis
Author(s)
T. Graffagnino
Abstract
The Swiss Federal Railways (SBB) plans and operates one of the densest railway
networks in the world. Analysis of train traffic data shows that overall
punctuality has steadily increased since 2003. One challenge presented by a
cyclic timetable is that the departure and arrival times for a given connection
always remain the same during the day. In order to increase traffic density
further while maintaining high punctuality, it is increasingly important to
identify and manage delay fluctuations. The first part of this paper will be a short
discussion about the problematic of a cyclic timetable in regard to the daily and
seasonal variations. The second part of this paper will focus on setting a
framework for the analysis of train traffic data by defining three dimensions:
train, time and place. These three dimensions might at first seem obvious but are
very powerful if used systematically. Based on these three dimensions, we will
show some examples of different groupings of train traffic data used at SBB to
identify potential punctuality problems. The third part presents a practical
analysis of the seasonal delay fluctuations for the entire Swiss train network. In
order to analyse the yearly fluctuation, we define a common punctuality
measure, then compute ten years of train traffic data (about 14 million train
arrivals). We will show that despite the fact that in these ten years the timetable
changed different times, the seasonal fluctuation remain similar. Different
questions such as the influence of winter, number of passengers or technical
problems are discussed. Finally, the need for further data and other analysis to
better understand the shown delay fluctuations will be addressed.
Keywords: cyclic timetable, punctuality, data analysis, train traffic, statistic.
Keywords
cyclic timetable, punctuality, data analysis, train traffic, statistic.
Related Book
Other papers in this volume
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