Drivers often use infotainment systems in motor vehicles, such as systems for navigation, music, and phones. However, operating\nvisual-manual interfaces for these systems can distract drivers. Speech interfaces may be less distracting. To help designing easyto-\nuse speech interfaces, this paper identifies key speech interfaces (e.g., CHAT, Linguatronic, SYNC, Siri, and Google Voice), their\nfeatures, and what was learned from evaluating them and other systems. Also included is information on key technical standards\n(e.g., ISO 9921, ITU P.800) and relevant design guidelines. This paper also describes relevant design and evaluation methods (e.g.,\nWizard of Oz) and howto make driving studies replicable (e.g., by referencing SAE J2944).Throughout the paper, there is discussion\nof linguistic terms (e.g., turn-taking) and principles (e.g., Grice�s Conversational Maxims) that provide a basis for describing userdevice\ninteractions and errors in evaluations.
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