Design of Middleware for Using RFID Reader and Tag to Collect Traffic Information Implemented and Tested on Urban-bus for ITS Application
Shing Tenqchen, Yuhan Tu, C H Wang, C H Lee, Shen-Lung Tung, Pramod T.C., Philip Lu, Y C Lee, Yuejin Huang, Haojun Huang, Foun-Shea Chang, K Y Chen · PROCEEDINGS OF THE 14TH WORLD CONGRESS ON INTELLIGENT TRANSPORT SYSTEMS (ITS), HELD BEIJING, OCTOBER 2007 · 2007
A website is proposed to exhibit the traffic information for every 5 minutes at certain places of street measured by three radio frequency identification (RFID) readers for 216 tags installed on two different urban-bus companies and transmit those information via GPRS modem from testing point to control center. Each data can be used to indicate the exact point of traffic condition in a big city. Because the design hardware of reader is not suitable for the purpose of collecting traffic information, one can not adjust its resolution as required. Thus, the analysis of turning point on the major errors of distance and timing errors is very important to let the system designer adopt correct strategies to compensate for all of possible errors. The following rules were devised: (1) when speed is fast, timing error becomes dominant; (2) when speed is low, distance error becomes dominant. The result is very valuable for the local government to make a decision on the adjustment of urban-buses. The result shows that the application of RFID tag and reader is an alternative way to extract the traffic information instead of traditional loop detector. It is suggested that the vehicle speed estimated by 2 tags 1 reader is more accurate than that of by 1 tag 1 reader using historical data. For the covering abstract see ITRD E140665.