A method for providing information to information representation units, the method comprising: determining, in a network server, information to be provided to at least one information representation unit, wherein the information to be transmitted to the information representation unit comprises at least time table information about one or more public transportation vehicles travelling on a predetermined route passing in the vicinity of said at least one information representation unit; transmitting the information to at least one public transportation vehicle travelling on the predetermined route passing in the vicinity of said at least one information representation unit; in response to the public transportation vehicle approaching said at least one information representation unit, transmitting the information from a short-range low power transmitter of the public transportation vehicle to a short-range low power receiver of the information representation unit; transmitting, from said one or more public transportation vehicles, location information and identity of each vehicle periodically to at least one server; updating, by said at least one server, timetable information regarding public transportation vehicles approaching said information representation unit on the basis of the location information and identities of the public transportation vehicles; characterized by transmitting the updated timetable information at least to the public transportation vehicle arriving next in the vicinity of the information representation unit; and transmitting the updated timetable information from a short-range low power transmitter of said next public transportation vehicle to the short-range low power receiver of the information representation unit. determining, in a network server, information to be provided to at least one information representation unit, wherein the information to be transmitted to the information representation unit comprises at least time table information about one or more public transportation vehicles travelling on a predetermined route passing in the vicinity of said at least one information representation unit; transmitting the information to at least one public transportation vehicle travelling on the predetermined route passing in the vicinity of said at least one information representation unit; in response to the public transportation vehicle approaching said at least one information representation unit, transmitting the information from a short-range low power transmitter of the public transportation vehicle to a short-range low power receiver of the information representation unit; transmitting, from said one or more public transportation vehicles, location information and identity of each vehicle periodically to at least one server; updating, by said at least one server, timetable information regarding public transportation vehicles approaching said information representation unit on the basis of the location information and identities of the public transportation vehicles; characterized by transmitting the updated timetable information at least to the public transportation vehicle arriving next in the vicinity of the information representation unit; and transmitting the updated timetable information from a short-range low power transmitter of said next public transportation vehicle to the short-range low power receiver of the information representation unit.