b116d9ce_ltimodal_Interaction_Use_Cases__Event_Handler
[User Action/External Input] GPS Input at regular intervals (indicating driver is off course) [Action on Device] N/A [Event Description] GPS_Data_In Event [Resulting Action] Map on graphical display is updated and textual message is displayed indicating that route is not correct. Prompt is played from the device indicating that route is being recalculated [Event Handler] 
Device processes location data and determines that user is off course
Multimodal Interaction Use Cases