Patent ID: 8279084

Claim:
A method for providing an expected arrival time of bus stops for a traffic information system, wherein the traffic information system includes an on-board device, a plurality of roadside base stations and a bus information server, the method comprising the steps of: a) at one of the roadside base stations which are installed at side of roadway between the bus stops, receiving an on-board device ID from the on-board device in a bus, when the bus equipping the on-board device passes the roadside base station without stopping; b) at the roadside base station, transmitting traffic information including the on-board device ID, a roadside base station ID and a pass time to the bus information server; c) at the bus information server, computing a traffic speed of each section between the roadside base stations using the traffic information; d) at the bus information server, computing an average traffic speed of each section between the roadside base stations using the computed traffic speed of each section; e) at the bus information server, computing time required for arriving at next bus stops from the roadside base station based on the computed average traffic speed of each section; f) at the bus information server, transmitting the computed time required for arriving at each of the next bus stops from the corresponding roadside base station g) at the roadside base station, transmitting the computed time required for arriving at each of the next bus stops to the on-board device when the roadside base station receives the on-board device ID; and h) at the on-board device, announcing the expected arrival time of each of the next bus stops based on the computed time required for arriving through an output device.