Demonstrating the effectiveness of olfactory stimuli on drivers’ attention

More than one million people die per year on world’s road. Researches have identified drivers’ cognitive aspects as the major cause of human errors in 80% of crash events. Driver-Assistance Systems (DAS) have been developed to detect data about vehicle, environment and driver, and to communicate information usually through the senses of vision and hearing. But, the growth of in-vehicle devices increases the visual and auditory demand of the driver. This research aims at investigating whether olfactory stimuli can be used to elicit drivers’ cognitive aspects. An experimental framework has been set up, and testing sessions have been organised. The analysis of the data collected from tests shows that olfactory stimuli are more effective in increasing some subjects’ physiological parameters than the auditory ones. Therefore, smells may be used as a DAS, for increasing drivers’ attention.