2016 Volume 47 Issue 2 Pages 537-542
We conducted a driving simulator experiment to observe the behavior of the driver during normal operation of the highly automated driving system and to investigate the driver’s behavior when accepting the system’s request for manual driving. During about 25 min of automated driving, driver usually felt drowsiness, unlike during manual driving. Furthermore, non-driving-related tasks such as the driver using a mobile phone were observed. At the end of the run, there was a construction site where lane change was required because the automatic driving systems reached the limit of functions. The timing of starting lane change was significantly later in the 2-sec condition than in the manual conditions. No significant difference was observed in the 5-sec and 10-sec conditions, however few high-risk lane changes were observed. We suggest that the method for generating the request to shift from automated driving to manual driving should be considered.
