Mobile phone signaling data is expected to be comprehensive, dynamic, wide-area information to track individual travel chain information in traffic big data. However, these analyses still lack sufficient empirical research on reliability, which results in deviation from the real situation, and even decision-making errors. Therefore, related technologies also have not formed a consensus in the industry for a long time, and cannot be widely adopted by the government as a credible basis. In the long run, it will be difficult to deeply support the research of traffic model theories and traffic governance decisions.