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A steady state analysis for yard performances

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Author(s): Marin Marinov | Philip Mortimer | Tom Zunder | Dewan M. Z. Islam

Journal: Journal of Transport Literature
ISSN 2238-1031

Volume: 5;
Issue: 1;
Start page: 33;
Date: 2011;
Original page

Keywords: rail freight | shunting yards | freight trains | G/G/m | queues

ABSTRACT
Yards play an important role for the quality of rail freight services. These facilities function as reassembly hubs in rail freight networks and incorporate a significant amount of static and dynamic resources. From the customer’s perspective yards are thought of as an element that adds a little value to the final product. Form the rail operator’s perspective yards are seen as a main source of delay and loss of business. Therefore, running yards inefficiently is not acceptable. In this paper, a double-ended flat-shunted yard has been studied by G/G/m queues. The results obtained demonstrate significantly low utilisation levels of the yard subsystems in question. Therefore, possible improvements through changes in traffic rules and production schemes are discussed.
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