# Eye-Tracking Investigation of the Train Driver's: A Case Study
## 2 Materials and Methods
### Research Conditions  
In the spring of 2020, an experimental investigation was conducted under real railway traffic circumstances. The primary stage of the study included the determination of an appropriate location for the experiment, which was the railway infrastructure line. After an appraisal of potential railway lines near Zilina, the Zilina-Puchov railway track was chosen due to its recent reconstruction, high-quality condition, modernized safety and train control system, and its widespread representation of Slovak railway characteristics such as double-tracking, electrification, traction system, high density of traffic, safety, and control system. Ten stops were located on the selected track section, from which two train stations and two railway stops were chosen for the analysis. Subsequently, the essential characteristics of the selected train stations and railway stops were identified:  
* Horny Hricov railway stop is located on the ZSR line no. 120 Bratislava hl.st.--Zilina, in the interaction section Dolny Hricov--Zilina. The stop position on the track is located at kilometer 195,042, with exits to the right side, in the direction of travel, and the double track is electrified by 3 kV DC. * Dolny Hricov station (Zilina district) is located on the double-track electrified (3 kV DC) line no. 120 Zilina--Bratislava, between Zilina and Bytca at kilometer 193,073. The station has seven transport tracks and one manipulation track. The station building is located on the left side, in the direction of Bratislava. * Bytca railway station is located on the double-track electrified line ZSR no. 120 Bratislava--Zilina, track kilometer 185,275; 3 kV DC electrifies the track. The station building is located on the right side, in the direction of Bratislava. The station has seven transport and four manipulation tracks. * Predmier railway stop is located on the ZSR no. 120 Bratislava hl. st.--Zilina, in the interstation section Povazska Tepla--Bytca, track kilometer 183,620. The track is a double track, electrified by 3 kV DC. The location of the building is to the left, in the direction of Bratislava hl. st.  
Our case study utilized the Skoda Transportation-manufactured electric double-decker multiple-unit series 671 (EPJ), which was utilized in a prior experiment [9], and is depicted in Figure 2. This multiple-unit rolling stock includes one electric traction wagon, one wagon, and one control wagon. Figure 1: Methodology of research. A case study was conducted on Railway Track No. 120: Bratislava-Zilina, situated in the section of Zilina-Puchov of Slovak Railways (ZSR) (see Figure 3). This double-track, 3 kV DC electrified railway line measures 44 km and is part of the V Corridor [41]. The track section has undergone a full overhaul, resulting in the maximum speed for conventional trains being raised to 120-160 km/h (as illustrated in Figure 4). The utilization of the European Train Control System Level 2 (ETCS Lvl. 2) has enabled tilting trains to achieve higher speeds. The completion of the reconstruction of the Puchov-Zilina lines will make ETCS level 2 fully functional, with it only being employed by compatible vehicles; the Automatic Signal Block system, however, will continue to be used due to the lack of  
Figure 3: Track section Zilina—Pichov with speed limitations. Figure 2: Electric double-decker multiple-unit series 671 [40]. compatible equipment in the carriers' vehicle fleets. Additionally, a new traction system, signaling apparatus, and information equipment have been installed [42; 43; 44]. Moreover, a mobile radio network and new telecommunication technology have been implemented to provide a direct radio link between the dispatcher and the moving trains, with the entirety of the track section being regulated from the central transport control center in Puchov [41].