ABSTRACT
At present, the railway line curves round the side of Turecký Vrch (Turecký Hill) in close proximity to a national road and the Biskupice canal. The current conditions in the narrow basin do not allow changes in the alignment which are required for increasing the speed limit over the track. This is why a new alignment has to be designed, with the best variant containing a mined double-rail tunnel. This variant provides the best solution to the conflict between the interest in protecting the Turecký Hill protected landscape area and the interest in the space for the modernisation of the railway line. The alignment passing through Turecký Hill begins in an extremely confined space in front of the entrance (southern) portal, where the railway line, the I/61 national road and a protective embankment of the Biskupice canal run in parallel with each other. It leaves the exit portal on the northern side via a right-hand curve, designed to minimise the work in the unfavourable environment of secondary loess. The portal proper can be built in a minimised construction trench.
