Traffic monitoring system with reduced communications requirements

摘要: Monitoring of traffic on selected routes requires little communication time, through reporting only instances abnormal speed. During a calibration phase calibrant vehicles are operated along the with sufficient frequency and for enough days to provide meaningful data. Each vehicle carries differential GPS receiver measuring location accurately. Average speeds intervals of, example, 15 seconds, stored, time place observation. The data from all then analyzed determine patterns mean speed bandwidth. In monitoring probe deployed, each carrying similar GPS, computer in which radio automatically out bandwidth that place.