Trajectory Reconstruction and Inter-City Traffic Flow Analysis Based on Mobile Phone Data

As the main mode of transportation between cities, the analysis of expressway traffic is of great importance for the movement of people during epidemic prevention and control, economic exchanges between cities, economic characteristics of cities, etc. To efficiently analyze the trajectories of crowd movement on inter-city and round-city expressways, this paper proposes an efficient algorithm for constructing expressway network graphs based on expressway location points. Data cleaning is performed on mobile phone location data to reconstruct the crowd transfer OD matrices on expressways; and location data between origins and destinations and the shortest path algorithm are used to obtain information about the route in the crowd transfer process. A region in China is selected as a case study; crowd transfer information is gathered on the expressway network and the cross-sectional flow of each expressway entrance and exit. The closeness of transportation between its urban area and affiliated counties is analyzed.