On July 26 2012, a railway collision between two freight trains happened in Hosena station, resulting in the complete destruction of the mechanical interlocking W3.

The project concerned an independent economic assessment, aiming to restore the operability after a railway operation error by utilising the methods relating to signalling. The scope of the project refers to the analysis of the pre-accident status of the control and safety technologies and the construction and planning documents used for their conversion into computer-based interlocking. The assessment is to examine which methods were necessary in view of the recognised rules of the technology and which methods could not be applied to the case due to their limitations.