Driver distraction is caused by any task that takes drivers’ attention away from driving-related activities (Regan et al., 2008; NHTSA, 2023). This distraction may be imposed by tasks that place demand on our auditory, visual, manual, or cognitive resources (or indeed a combination of these). Currently, there is good agreement amongst policy makers and researchers about the dangers associated with tasks that take our eyes and hands away from driving. This visual/manual distraction is also typically identified and mitigated by a range of in-vehicle sensors and driver monitoring technologies. The term “cognitive distraction”, however, is not as well defined, nor as easily or reliably detected by in-vehicle technologies. There is also a longstanding debate amongst researchers about the effects of this type of distraction on driving performance and road safety. This topic has gained recent interest in the UK, in a bid to reduce crashes associated with handsfree mobile phone conversations, which I consider to be one form of cognitive distraction. To mitigate this type of distraction, Euro NCAP recently has included assessment of technologies that monitor drivers’ cognitive distraction in its Vision 2030 roadmap. While I will not pretend there’s an easy and clear path for identifying this driver state, during this talk, I will provide an overview of the methods used to impose cognitive distraction in the lab, also considering why this state is not as easy to identify in the wild. I will highlight how cognitive distraction affects drivers’ response during manual and automated driving, with an aim to providing some food for thought regarding future research in this area.