Analysis of the driving behavior when the system safety level during automated driving is presented to drivers

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<p>In this study, it was analyzed how presenting information on the system safety level of automated driving system affects the driving behavior of driver, with the experiment using the driving simulator. During automated driving categorized to the level 2, we analyzed the driving preparation level of the drivers when presenting the system safety level on a display fixed on instrument panel. This driving preparation level of drivers was quantified, based on the gaze action and brake/gas pedal operation behavior of drivers, in a driving simulator investigation with 26 subjects' participation. As one of the experimental results, when system safety level was presented to drivers, the operation preparation level of the drivers increased instantly with the fall of the system safety level. We also quantified the effects by presenting system safety level in this driving simulator study. It was verified that the risk of the traffic accidents as Human-Machine system based on the state transition probabilistic model proposed by authors can be minimized when the system safety level was presented to the drivers. For instance, it was confirmed that the collision probability tended to reduce relatively by 37.9% with the indication of the system safety level.</p>

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