The effect of train protection systems on train drivers’ visual attention

Abstract

Today, train protection systems are widely used to avoid critical situations in railway traffic. However, the train driver is still responsible for the continuous monitoring of signal aspects and the derivation of suitable actions. The question arises if, with train protection, also negative effects of automation may occur that reduce the capability to act quickly when necessary. Giesemann & Naumann (2015) describe the attention processes and the interrelations of causes regarding attention deficits in the context of the train drivers’ workplace in a system related onset model of attention deficits. Based on this model, in the present study, the German intermittent train protection system PZB was compared to a drive without train protection system, regarding visual attention. 20 experienced train drivers took part in this simulator experiment, driving both conditions in a balanced within-subject design. Task was to drive a 30min track according to a given timetable. Gaze direction and driving performance were recorded. As assumed, the train protection systems leads to complacency effects as well as a shift in visual attention from monitoring the rail track to the display when driving with train protection. Also, there is less cross-checking between the two information sources track and in cab display.