The Contribution Of State Resources In A
Constraint-based Scheduling Model For Conflict
Solving At Railway Junctions
Author(s)
J. Rodriguez
Abstract
Scheduling is the process of allocating resources to activities over time. In a
scheduling problem, resources are scarce and constrained in various ways (e.g.
in the order of activities and the capacity of resources), and one is looking for a
schedule of the activities that both satisfies the constraints and is optimal according
to some criterion.
Over the last decade, constraint-based scheduling (CBS) has become the
dominant form of modelling and solving scheduling problems.
This paper deals with a CBS model of real time management of train traffic
through junctions, it focuses on the use of state resources to improve the model of
conflicts between trains running in opposite directions.
1 Introduction
The railway industry has to improve the quality of service provided in order to
increase freight and passenger market-shares. One important parameter that affects
the quality of service is the efficiency and the effective use of resources. To achieve
this aim, one solution is the use of computer-aided systems in planning and traffic
control. A significant part of these computer-aided systems involves the model and
the solution method of the optimisation problem, associated with real situations
and decisions to be taken.
When traffic on connecting lines of a junction is heavy, the junction is likely to
be a critical resource. As a consequence, small disruptions are amplified. A few
seconds originally can quickly lead to a delay of more than 5 minutes. To limit this
Keywords
Related Book
Other papers in this volume
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