ABSTRACT
Railway infrastructure managers develop intervention programs that define the interventions to be executed in the next planning period. Due to limitations in resources, they try to optimise their intervention programs. This is difficult when considering objects of all different types within a railway network as well as the dependencies between the objects and between objects and the provided service. In this paper, a network flow optimisation model is used to develop the optimal risk reducing intervention program for a railway network in Switzerland consisting of a 20 km long single track line. The optimal risk reducing intervention program is, thereby, the one that maximises the net benefit, where the benefits consists of the reduction in risk and future expected costs due to the execution of risk reducing interventions. The model allows the consideration of different types of objects and economical, topological, structural and resource dependencies between objects.
