This paper reports the details of the collection of the multimedia data such as audio, video and auxiliary information of the vehicle during a spoken dialogue in a moving car. The system specially built in a Data CollectionVehicle (DCV) supports synchronous recording of multi-channel audio data from 16 microphones, 3-channel video data and the vehicle related data. Multimedia data has been collected for three sessions of spoken dialogue in about a 60-minute drive by each of 200 subjects. Data has been collected for two dialogue modes:(1) prompted dialogue between the driver and an accompanying operator and (2) natural dialogue between the driver and a telephone operator for information access over a cellular phone while driving a car. The corpus can be used for analysis of multimedia data in a moving car environment and also for modeling spoken dialogue in scenarios such as information access while driving a car.