The calculation of capacity of railway lines is performed today by the railway management by using empirical or analytical methods. The paper aims at demonstrating the validity of the above-mentioned methods for each railway scheme upon their integration with analytical constraints for junction and station trucks capacity, components of a given ailway scheme. Capacity is calculated as solution of a problem of a constrained optimum. An application of the proposed method is carried out for a real case of a medium complexity railway scheme. This allows us to verify immediately its validity and to evaluate planning alternatives of management.
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