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| Extraction of Catastrophe Boundary and Evolution of Expressway Traffic Flow State |
| LIU Haomin, QU Dayi, SONG Hui, MENG Yiming
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| School Of Mechanical & Automotive Engineering,Qingdao University of Technology, Qingdao 266525, China |
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Abstract In order to solve the increasingly serious congestion of expressways, the traffic operation state and its evolution law are discussed, and the traffic state discrimination standard is determined. The traffic simulation platform VISSIM software is used for simulation analysis, and the spectral clustering analysis algorithm is used to accurately extract the abrupt boundary of traffic state. Combined with the cusp catastrophe theory, the traffic flow state at different times and locations is studied and analyzed. The results show that there is an obvious catastrophe phenomenon when the traffic flow transforms between the two states of free flow and congestion flow.
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Received: 05 January 2022
Published: 08 October 2023
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