A systematic review on test performance of the driver takeover process in automated driving

Much research has been conducted on takeover behavior in automated driving, and integrating these studies into a knowledge system can help to gain a deeper understanding of the current research status and guide critical future research. The takeover focused in this study refers to the takeover related to human intervention (i.e. the transfer of control between the human driver and the auto drive system), rather than the context of overtaking another vehicle (e.g., lane changes and acceleration). The takeover behavior is a multi-stage process consisting of situation awareness, decision & reaction, and takeover performance stages. An in-depth review of takeover behavior characteristics from the three takeover stages is helpful to describe the takeover process and analyze takeover behavior characteristics systematically. Therefore, this paper aims to review driver's takeover performance from the three levels of driver, automated vehicle, and road environment based on the takeover behavior mode. First, we identified 1329 articles through a systematic literature search. 122 articles were included in this review. Second, we use the knowledge graph method for bibliometric analysis. Third, we systematically review the characteristics of takeover behavior in three stages (situation awareness, decision & reaction, takeover performance) from three dimensions: driver, vehicle, and road environment. At the same time, this study develops scoring rules that quantify each factor's contribution to takeover behavior. Fourth, based on the reviewed literature and scores, 18 suggestions were proposed to improve takeover behavior from three levels: drivers, vehicles, road environment. Finally, we have outlined the future fundamental research of takeover behavior. This review summarizes the research content of takeover behavior testing and forms a knowledge system, which provides researchers with a window to understand the research status and development context. This review can guide future research on takeover behavior.