posted on 2019-10-11, 08:53authored byArun Ulahannan, Rebecca CainRebecca Cain, Simon Thompson, Lee Skrypchuk, Alex Mouzakitis, Paul Jennings, Stewart Birrell
Partially automated vehicles present interface design challenges in ensuring the driver remains alert should the
vehicle need to hand back control at short notice, but without exposing the driver to cognitive overload. To date,
little is known about driver expectations of partial driving automation and whether this affects the information
they require inside the vehicle. Twenty-five participants were presented with five partially automated driving
events in a driving simulator. After each event, a semi-structured interview was conducted. The interview data
was coded and analysed using grounded theory. From the results, two groupings of driver expectations were
identified: High Information Preference (HIP) and Low Information Preference (LIP) drivers; between these two
groups the information preferences differed. LIP drivers did not want detailed information about the vehicle
presented to them, but the definition of partial automation means that this kind of information is required for
safe use. Hence, the results suggest careful thought as to how information is presented to them is required in
order for LIP drivers to safely using partial driving automation. Conversely, HIP drivers wanted detailed information about the system’s status and driving and were found to be more willing to work with the partial
automation and its current limitations. It was evident that the drivers’ expectations of the partial automation
capability differed, and this affected their information preferences. Hence this study suggests that HMI designers
must account for these differing expectations and preferences to create a safe, usable system that works for
everyone.
This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/