This study proposes a new kind of lateral control driving assistance, which acts at a sensorimotor level, in contrast with traditional warning devices. The first objective was to determine whether motor priming assistance (consisting of directional steering wheel vibrations) can be of some benefit compared with more traditional auditory (lateralized sound) or vibratory (symmetric steering wheel oscillation) warning devices. The authors hypothesize that warning devices favor driving situation diagnosis, whereas motor priming can improve the initiation of action even further. The second objective is to assess the possible benefits of using multimodal information by combining auditory warning with simple steering wheel vibration or motor priming. An analysis of the steering behavior of 20 participants following episodes of visual occlusion was carried out. Five warning and motor priming devices were compared. Results showed that all tested devices improved the drivers' steering performance, although their effects were modulated by the drivers' risk assessment. However, performance improvements were found to be greater with a motor priming device. No additional performance enhancement was observed when auditory warning was added to steering wheel vibration or motor priming devices. These findings confirm the hypothesis that the direct intervention of motor priming at the action level is more effective than a simple warning, which intervenes upstream in situation diagnosis.
Abstract