Publication

Gestion stratégique de la maintenance et de la capacité d'un réseau ferré

Yves Putallaz
EPFL, 2007
EPFL thesis
Abstract

The railway reforms introduced since the nineties tend to spread responsibilities among different actors involved in the management of the railway system. On the other side, the governmental organisations are forced to boost the productivity of their railway infrastructure resulting in pressure on the public funding and an increase in the availability demand of the infrastructure (network saturation). Due to this pressure, two problems occur. The first is the sustainable management of the infrastructure through application of a long term maintenance policy. The other difficulty involves the maintenance organisation, especially the organisation of the possession times, in the context of an increasing saturation of the network. In these two cases, the problem lies in the coordinated management of the development of the railway infrastructure, including maintenance and capacity issues. In this context, this thesis proposes four considerations distinguishing the important relationship between several elements of maintenance planning and the technical-economical constraints connected to the infrastructure capacity. The first consideration deals with structuring the problems of the infrastructure maintenance and its planning process. The second regards the evaluation of the risk of infrastructure not being available, including the financial risks involved with this non availability. The third is on the relationship between maintenance works and capacity issues. The fourth and final consideration focuses on the long-term maintenance needs and the economical implications on capacity especially with regard to the network saturation and the choice of the best strategy. The considerations lead to the creation of three models proposing some possible development strategies which might by time support the infrastructure manager with his tasks.

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Related concepts (6)
Infrastructure
Infrastructure is the set of facilities and systems that serve a country, city, or other area, and encompasses the services and facilities necessary for its economy, households and firms to function
Rail transport
Rail transport (also known as train transport) is a means of transport that transfers passengers and goods on wheeled vehicles running on rails, which are incorporated in tracks. In contrast to road t
Planning
Planning is the process of thinking regarding the activities required to achieve a desired goal. Planning is based on foresight, the fundamental capacity for mental time travel. The evolution of foret
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Related publications (1)

Strategic evolution of railway corridors infrastructure: dual approach for assessing capacity investments and M&R strategies

Yves Putallaz

Political trends as well as general growth of the transport market set new challenges to railways and particularly to rail infrastructure managers. Rail infrastructure must become more efficient, which is to say that costs must be reduced and the use of capacity optimised, through better timetabling and network adjustments. But above all, rail infrastructure management should tackle strategic issues (on the long-term), hence the need for more adequate planning tools. Nowadays, infrastructure managers tend often to concentrate on operational and short-term problems ; meanwhile, reshaping rail networks requires several years of planning and implementation. In this context , the paper presents a methodology and the bases for the development of an effective decision support system to help infrastructure managers in setting up development strategies for rail corridors or networks. The methodology deals not only with the planning of investments in capacity (timetabling and timetable analyses), but takes also into account the impacts of timetable on the maintenance and renewal policies, in particular through the analysis of interactions between service deteriorations and track possessions. The methodology covers both the analysis of the availability and the reliability of capacity, and the maintainability of the infrastructure as well. The paper shows the importance of the long term planning of rail infrastructures and proposes a way of tackling both the analysis of capacity investments and the elaboration of maintenance and renewal policies. The presented approach is based on two existing software, CAPRES and FASTA, and on a third model, MRPOL, currently under development.
2004