Disclosed herein is a method and apparatus for providing traffic information of public transportation means, such as a bus, and utilizing the provided information. A method of encoding public traffic information according to the present invention creates an identifier of bus information system, an ID of bus route, and location information of each in-service bus pertaining to the bus route. The location information is expressed in a stop ID that is uniquely allocated to all of bus stops within coverage of BSI (Bus Service Information) service. The created information is organized to status information that is in turn incorporated into a transfer message. A sequence of transfer messages, each being constructed as described above, is wirelessly transmitted.