Abstract
In urban road traffic system, a variety of travel modes coexist and interact with each other. Micro modeling and analysis methods are difficult to capture the macro evolution characteristics and interaction of traffic flow. Based on the actual road network and vehicle trajectory data of Beijing, this paper calculates the total number of vehicles on the road section through the taxi trajectory data and the safe distance model to obtain the social vehicle data, and uses the bus moving trajectory data to obtain the bus vehicle data. Based on the three-dimensional macroscopic fundamental diagram (MFD) method, a three- dimensional MFD of social vehicle-bus vehicle is established, and the model parameters are solved by the least square method. The traffic flow data obtained by processing is used to verify its existence. According to the results of regional division, the influence of the number of buses in the two regions on the traffic capacity in the region is compared. The three-dimensional MFD model constructed in this paper can reflect the evolution characteristics of actual traffic flow, which is of great significance for traffic control of different trips.
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