The invention discloses a macroscopic fundamental diagram-based method for determining the bearing capacity of a network, which includes the following steps of 1) selecting the research scope of a road network, and acquiring the geometric information, the node green-light strategy and the traffic organization of the road network; 2) drawing the macroscopic fundamental diagram (MFD) of the research scope, setting a detector based on the real environment, acquiring the traffic data of the road network to draw a scatter diagram, and judging whether the MFD meets relevant requirements or not; on the condition that the MFD meets the requirements, directly transiting to the step 3); on the condition that the scatter diagram is not completely drawn, complementally drawing the scatter diagram in the microscopic simulation manner and then conducting the step 3) after completely drawing the scatter diagram; 3) dividing the scatter diagram into three intervals, fitting the line segment of each interval by means of the least square method, extending the three line segments to form a trapezoid together with an abscissa axis, and drawing to complete the final MFD; 4) determining the bearing capacity of the regional road network according to the MFD drawn in the step 3). According to the technical scheme of the invention, the defect that the estimation of the traffic state, which heavily relays on the mass data-based computing method in the prior art, is relatively low in accuracy can be overcome.
Macroscopic fundamental diagram-based method for determining bearing capacity of network
2015-09-23
Patent
Elektronische Ressource
Englisch
IPC: | G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS |
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