The ŽSSK 757 007-0 remotorised Okularnyk between Čremošné and Horná Stubna obec

The previous Zsolna to Zólyom fast train ran South on the original MÁV mainline. It is double-track between Ruttka and Felsőstubnya. At Alsóstubnya (Odbočka Dolná Štubna) there is a junction, where a ČSD-built, modern mainline branches, giving a quicker connection to Zvolen than the original line with its many curves. That line is now a secondary line with number 171. This train running on the mountain section of line 170 has already passed the main tunnel after climbing a few loops and passing a number of smaller tunnels and viaducts. The new line also runs through the important city of Besztercebánya (Banská Bystrica), connecting to the industrial siding of the paper mill at Ul'anka.