운전 외 작업 중 발생하는 자가개입에 따른 운전자 제어권 전환 퍼포먼스 연구

Abstract

Objective: The aim of this study is to investigate the effect of self-interruption during NDRT on takeover performance. Background: As autonomous driving technology developing, the role of human driver becomes a passive passenger in an automated vehicle. Drivers would perform non-driving related tasks instead of driving, especially multitasking. During performing NDRTs, driver might switch between various tasks by self-interruption. However, most of studies did not considered multitasking as NDRTs. In this study, experiment considering self-interruption is conducted and investigate effects of self-interruption on takeover performance. Method: To investigate effects of self-interruption to takeover performance, experiment using driving simulator was conducted. The experiment consists of three trials depending on types of NDRT. Watching a short video was selected as a NDRT. There were three conditions of NDRT according to self-interruption. One had no selfinterruption and others had. Self-interruption was caused by an advertisement for three seconds in the middle of a video. Drivers performed monitoring or smartphone in each conditions with self-interruption. Results: Takeover performance was measured by road-fixation time and takeover time. There was no statistically significant difference for road-fixation time depending on self-interruption. However, self-interruption has a significant effect on takeover time. Takeover time was shorter if there was a self-interruption during NDRT. Also, it was more effective to use a smartphone during self-interruption. Conclusion: Self-interruption during NDRT makes takeover performance better. Takeover time was better in the condition with self-interruption, especially performing smartphone. Application: Generating self-interruption during autonomous driving has a positive impact on takeover performance. This results could be utilized in designing in-vehicle devices and make interaction between drivers and vehicles more active.