PURPOSE:To obtain the road traffic information in a service area in which an automobile telephone subscriber exists in an optional time by providing an automobile telephone exchange receiving a special number from an automobile telephone subscriber and connecting the automobile telephone subscriber to the traffic information center. CONSTITUTION:When an automobile telephone subscriber 5 existing in a service area A dials with a predetermined special telephone number, an automobile telephone exchange 2 receives and processes it. That is, the subscriber is connected to an information transmitter 6 corresponding to the service area A of the radio base station 3 originated from the outgoing subscriber in the traffic information center 1. Thus, an information recording and reproducing device 4 is started and the traffic information (a) corresponding to the service area A is offered to the automobile telephone subscriber 5 through the trunk 7 of the exchange 2 and the network 8 from the device 4.
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