自動運転時の車両挙動を用いたシステム作動状態理解支援

抄録

If drivers take their hands off the steering wheel during automated driving, drivers may easily lose situation awareness. In order to establish really useful level 2 driving automation, the automated driving system should be designed to assure that drivers can maintain their awareness of the system’s operating condition. Thus, we propose a method to support drivers’ situation awareness during the automatic mode by providing the system’s intention and situation understanding through vehicle behavior. Drivers may easily recognize something is wrong when an expected vehicle behavior is not observed due to system’s functional limitation, and the drivers may be able to intervene into control smoothly even when their hands are off the steering wheel. An experiment using a driving simulator was conducted in order to evaluate the effectiveness of the proposed method. The results from 20 drivers showed that the proposed method was effective in supporting drivers who did not hold the steering wheel to understand the system’s operating condition just like the drivers who held the steering wheel.