The use of mobile phone for real-time traffic data

Location-based measurement equipments are widely used in practice. However, the traffic data they collected are restricted in small spatial scale. Recently, more and more trajectory-based equipments are introduced in field. Floating cars and cell phones are two promising products. Since large market penetration of cell phones, they have attracted more and more attention. The use of cell phone signals to extract real-time traffic data has become a hot topic. In this paper, we have conducted a comparison between two products based on cell phone. A detailed analysis of the performance of the two products will be elaborated in the following sections.