A Petri Nets Based Decision Support Tool
For Railway Traffic Conflicts Forecasting
And Resolution
Author(s)
S. Ricci & A. Tieri
Abstract
The full paper describes current results and applications of an ongoing research
concerning the operational simulation of complex railway systems based on
working criteria and operational rules of interlocking and line signalling systems.
Modelling is based on object oriented approach by the Petri nets formalism, that
allows high processing openness and modular building without breaking away
from the safety systems logic. The development of a full model includes the
integration of a Common module to be applied to any layout and interlocking
technology, a Timetable module capable to simulate the operational program, a
Movement Inspector module to manage traffic priorities automatically and
finally a Top Level module where a specific layout and its routes are modelled.
The software tool used is a specific software for extended Petri Nets
development, validation and simulation (Faber©), that allows modularity in Petri
nets definition and manages variables and types declaration, being endowed with
a C language interpreter. The tool could be used both for regularity forecasting
and in decision support systems for the management of conflict resolution. For
these goals the model was largely tested on the Roma-Formia railway, an Italian
high density traffic line. The tests include simulations of traffic regularity
monitoring and forecasting in both un-perturbed and perturbed conditions, by
generating delays of sets of trains along the line and by verifying the response of
the system in comparison with measured delays.
Keywords: Petri nets simulation, railway traffic management, automatic
overtaking.
Keywords
Petri nets simulation, railway traffic management, automatic
overtaking.
Related Book
Other papers in this volume
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