A Decision Support System For Railway
Timetabling (MOM): The Spanish Case
Author(s)
F. Barber, P. Tormos, A. Lova, L. Ingolotti, M. A. Salido
& M. Abril
Abstract
Train timetabling is a difficult and time-consuming task, given the complexity
and number of constraints to be taken into account. A feasible train timetable
should specify the departure and arrival time of each train to each location of its
journey so that the line capacity and other operational constraints are met.
Traditionally, train timetables have been generated manually by drawing trains
on the time-distance diagram, where train schedules are manually adjusted so
that all constraints are fulfilled. This process can take a long time and it usually
stops once a feasible timetable is found. The difficulty of the process increases in
complex and high-loaded networks and the resulting timetabling may be far from
optimal. In this work, we present MOM: a friendly, flexible, computer-based
Decision Support System (DSS) whose main goal is to support the railway
planner to efficiently obtain optimized train timetables. The system generates
feasible and high quality timetables by considering the set of constraints of the
problem and optimization criteria related to the use of railway infrastructures and
operator requirements. The railway planner can obtain several solutions
automatically, by modifying certain parameters (departure interval, frequencies,
among others). Hence, the user can analyze them and take decisions about
conditions related to railway traffic and infrastructure. Furthermore, an important
feature of the DSS is the consideration of hard and soft constraints which makes
the search process more flexible and reaches better solutions. The developed
DSS offers assistance in train scheduling, conclusions about the maximum
capacity of the network, identifying bottlenecks, determining the consequences
of changes, providing support in the resolution of incidents, and alternative
planning in on-line scheduling for real traffic control. This DSS software is being
successfully used by the Spanish Manager of Railway Infrastructure (ADIF).
Keywords: Decision Support System, train timetabling, railway capacity,
on-line scheduling.
Keywords
Decision Support System, train timetabling, railway capacity,
on-line scheduling.
Related Book
Other papers in this volume
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