Advancing ISO 2631-1 by considering pre-emesis symptoms in carsickness
conference paper
Passengers of highly automated vehicles are anticipated to experience increased levels of carsickness. In turn, this may adversely impact public acceptance and commercial success rendering mitigation methods of strategic importance. The current ISO 2631-1:1997 standard provides estimates of the likelihood of passengers reaching emesis due to motion, whilst pre-emesis symptoms are of greater interest regarding carsickness but may show a different frequency dependency. Further, it was derived for vertical motion only, whilst horizontal motion is also of greater interest to carsickness. In response, a series of motion simulator studies (n=96) were conducted exploring the impact of frequency (0.06-3.2 Hz) and motion direction (x-, y-, and z-axes) on pre-emesis symptoms assessed via the Motion Illness Symptoms Classification scale (MISC). Whilst no differences in frequency dependency were found across the three axes, the observed normalized frequency weighting function peaked at 0.23 Hz, slightly higher than the value of 0.17 Hz, and predicted more sickness than assumed by the ISO standard, in particular at higher frequencies. It is concluded that the frequency weighting for pre-emesis symptoms differs from the ISO weighting, the latter leading to a gross underestimation of the problem which calls for a revision of the current standard.
TNO Identifier
1024319
Source title
Proceedings of the Driving Simulation Conference, DSC 2024 Europe VR, Driving Simulation Association, 18-20 September, Strasbourg, France
Pages
91-95