cannot be correctly produced by the text to speech system. To alleviate some of these problems, we modified Direction Assistance to make both attentional and intentional information about the route description available for the assignment of intonational features. With this information, we generate spoken directions using the Bell Labo~ ratories Text-to-Speech System[21] in which pitch range, accent placement, phrasing, and tune can be varied to communicate attentional and intentional structure. .
