Appendices: 1) Automotive speech interfaces: a state of the art survey / Annika Silvervarg and Arne Jönsson, pp. 17-37. 2) Concept Design for Voice Control in Trucks - What do drivers actually want? pp. 38-55. 3) Speech recognition technology in trucks: potential uses and implications for visual-manual distraction / Sofia Lindvall pp. 56-79. 4) Using tactile detection response task for evaluating in-vehicle systems in trucks / Sofia Lindvall, pp. 80-114. 5) Subjective usability measurement for speech dialogue systems in trucks: a methodology study / Jonatan Andersson, pp. 115-133. 6) Reduced dIstraction via Voice intERaction: RIVER deliverable D2 / Annika Silvervarg, Sofia Lindvall, Jonatan Andersson, Arne Jönsson, pp. 134-146. 7) Speech versus visual-manual interfaces in trucks: effects on driver distraction, user acceptance, and percieved efficiency / Sofia Lindvall, pp. 147-206

To allow drivers to interact with voice is seen as an important countermeasure to unsafe driving since voice technology aims to reduce the visual-manual load, allowing the driver to keep his/her eyes on the forward road scene. Studies have shown an increased risk when using visual-manual interaction compared to using voice control while interacting with nomadic devices. This would support the idea to increase the usage and integration of voice interaction in vehicles. However, at the same time voice interaction may still impose a high level of cognitive distraction. RIVER aims to further explore the relationship between visual and cognitive load and voice interaction. New and improved means for the driver to interact safely with the vehicle via voice will be developed and demonstrated in a demonstrator that will be evaluated in a real field setting with professional drivers. In addition to safety, the evaluation will also include acceptance and efficiency of the interaction.