Patent ID: 6334086
Filing Date: 2001-12-25
Classification: G08G

Abstract:
A method for collecting traffic information comprising the steps of:a position information transmitting step of installing a position transmitting device at a starting point and an ending point of a link of entire road and transmitting position information of the link to probe vehicles;an information receiving/classifying/searching step of receiving a transmission signal of a corresponding position while traveling on a road, and continuously classifying and searching the intensity of the signal and the position information of the link;receiving the signal through an antenna from the position transmitting device, and classifying the position information and the intensity of the received signal and outputting the same;digitizing the intensity of the signal as classified by a receiving module;measuring a travel distance of the probe vehicle according to a proportional expression of the number of the pulse inputted from the travel distance detector and a circumference of a wheel of the probe vehicle;measuring time required for the probe vehicle to travel in the link;computing a travel time, a travel distance and a travel speed of the link on the basis of the position information classified by the receiving module, the digital value according to the intensity of the signal and the measured distance and time;modulating the information related to the travel time, the travel distance and the travel speed of the link obtained by a second microprocessor and transmitting the same through the antenna to a communication relay unit;a travel information transmitting step of detecting the position of the probe vehicles and the starting point and the ending point of the link according to the result of searching, computing the time, the distance and the speed required for traveling the link on the basis of the detected information, and transmitting the same; anda traffic information managing step of receiving and systematically storing the travel information on the probe vehicles, computing a representative value for the travel information of each link, and recognizing and managing the traffic flow information on the entire road.