Most road speed information is collected from road-side vehicle detectors. However, the fixed detectors can only cover specific road sections on the road network. With the availability of convenient positioning technology and the applications of related fleet management system, the vehicle tracking data, becomes an important role for estimating traffic status and timely traffic information in urban cities as known as floating vehicle data. It can be complementary to vehicle detectors and provides higher road traffic information coverage rate of overall road network in Taiwan. This paper proposes an advanced traffic information system using the real-time GPS data collected through commercial fleet systems. The essential components of our system are a floating vehicle data-collecting module, quick map-matching approach, road speed estimation module based on GPS points, and finally an ITS information website that can announce real-time road speed information on the electronic map. Our experiments show that traffic information system based on GPS floating vehicle data can provide about 12.5% road speed information coverage rates of road network in Taipei city and a mean average error (MAE) of 7.16% compared to the information collected from vehicle detector.
GVP (GPS Vehicle Probe) ITS (Intelligent Transport Systems) FVD (Floating Vehicle Data)