ABSTRACT
To explore how human-human communication (HHC) strategies in handover interaction can be applied to the operation of level 3 and 4 automated vehicles (AVs), this chapter presents a novel simulation study featuring two human drivers tasked with handing over control to one another while remaining in control of the vehicle. Drivers were tasked with communicating vocally in a variety of ways inspired by human-human shift-handover communication. This chapter explores how vocal communication could take place in AV interfaces and presents findings on the use of language, information transmitted, method of transmission, workload, usability, acceptance, and the level of lateral and longitudinal control following handover which are presented to inform which communication strategies are more effective for informing future vocal interfaces in level 3 and 4 AVs.
