Phantom braking in Advanced Driver Assistance Systems. Driver experience and Car manufacturer warnings in Owner manuals
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The present report describes the work carried out with the main goal to map and identify the occurrence of phantom braking, to identify under which special conditions these episodes happen more often, and to reveal the level of trust, attitudes, and interest towards Advanced Driver Assistance Systems among Norwegian drivers. A prior ana lys is of the user manuals of 8 car mode Is from 2019 and onwards revealed that different names and descriptions of Automatic Emergency Braking (AEB) are interchangeably used in the manuals. The review shows that information about unexpected braking and AEB limitations is available in the manuals to the car drivers/owners. In addition, a web-survey was distributed to nearly 25 thousand drivers across Norway, yielding a final sample size of 3,415 respondents. The results of the web-survey indicated that over 70% of the respondents reported to have experienced phantom braking at least once in their lives, under different driving speeds and different conditions. Three conditions in particular were most associated with phantom braking: road/street geometry, oncoming traffic, and constructions next to and across the roads. Other conditions were provided by the respondents as possible triggers for phantom braking, including conflicts between outdated map data in the vehicles and the real traffic regulations. Finally, the results also revealed that despite having experienced phantom braking, the majority of respondents are still positive towards ADAS, and these continue to be activated in their vehicles.