Empirical Analysis of Arterial Fundamental Diagram and Optimization by Floating Car Data

The fundamental diagram (FD) reflects the operational status of road network traffic and it is a model describing the relationship between traffic density (traffic volume and occupancy rate) at steady state. In this paper, an empirical study is carried out on the model of Nanhuan Road in Changping District. The basic data of flow rate, occupancy rate and driving speed are obtained from the data of geomagnetic detector and floating car, and then the current road status are analyzed. According to the existing data, the traffic flow of the arterial is simulated. Based on the geographical features of the arterial and the traffic flow data, the green wave band control scheme is calculated and the data after the coordinated control is extracted. In the study of arterial coordination control, the influence of the coordination control parameters on FD shape and its influence on the capacity are analyzed.