The line runs through challenging karst terrain and includes several major engineering structures, including numerous tunnels and three large viaducts. At approximately 7 km, the longest tunnel is also the longest railway tunnel in the country. This makes the project one of the most technically complex infrastructure projects in Slovenia’s history.

The RHEDA 2000® ballastless track system was selected for the majority of the line. The system is particularly suitable for applications of this kind, as there is no need to change the track system between earthworks, tunnels and bridge sections.

The optimal combination of precast components, in the form of bi-block sleepers, and cast-in-place concrete construction enables high construction quality while allowing flexible adaptation to local site conditions and keeping installation costs low. RHEDA 2000® also enabled the transitions between ballastless and ballasted track to be implemented efficiently and reliably.

RAILONE additionally supported the project by preparing the detailed design for the ballastless track, providing technical consultancy and developing project-specific installation guidelines in close cooperation with the customer. Proven German and European standards were adapted to meet local requirements. Thanks to RAILONE’s international production network, components can be supplied worldwide and on schedule, an important factor in the successful implementation of this major project.