Traffic broadcasting system

A method of transmitting information from a central ground station to a plurality of mobile auxiliary ground stations via at least one base station, each of said auxiliary ground stations being located within the transmitting range of at least one of said base stations and being provided with a receiving device having a control unit and a memory, said method comprising the steps of:

• transmitting from said central ground station a block of messages cyclically repeated within a time frame, each message including an address code corresponding to the area code of the region adjacent a corresponding base station, said block of messages being transmitted on a single frequency;
• receiving said block of messages at each of said base stations;
• transmitting from each of said base stations said received block of messages, said block of messages being transmitted on a single frequency;
• receiving said block of messages at the receiving device of said auxiliary ground stations;
• recording in said memory those received messages having a selected area code and controlling said memory with said control unit to effect said recording;
• converting said recorded messages to an information signal;
• recording changed messages having said selected area code and a changed signal associated therewith;
• and
• converting said recorded changed messages to an information signal and controlling said memory with said control unit to effect said converting of said recorded changed messages to said information signal.