As the development of mixed reality (MR) technology continues to progress, the range of applications and purposes within vehicles and for road users is expanding. MR holds the potential to enhance road safety, enable drivers to engage in non-driving related tasks (NDRTs), and improve passenger experiences. Moreover, the utilization of head/helmet-mounted displays (HMDs) with MR technology for cyclists can augment their vision and contribute to the safety of both cyclists and pedestrians. Furthermore, MR can play a crucial role in facilitating the transition towards automated driving. Nevertheless, there remain several challenges associated with the application of MR in vehicles, as well as human factors issues that require resolution. Additionally, virtual reality (VR) has the capability to immerse passengers in virtual worlds, offering opportunities for enjoyable passenger experiences. Presently, most MR research primarily focuses on individual users at a particular point along the reality-virtuality continuum. In this workshop, we will examine the potential, limitations, impact, role, and suitability of MR in driving applications and simulations. This will encompass topics such as holistic MR experiments, transitional interfaces, and HMDs specifically designed for cyclists. The primary objective of this workshop is to establish a research agenda for the application of MR utilized by road users over the next 3 to 5 years and beyond.