Journal of South China University of Technology(Natural Science Edition) ›› 2024, Vol. 52 ›› Issue (8): 34-44.doi: 10.12141/j.issn.1000-565X.230386

• Traffic & Transportation Engineering • Previous Articles     Next Articles

Speed Prediction for Road Around Large Scale Activities Venues Considering Multiple Factors Synergism

WENG Jiancheng1(), WU Mingzhu1, WEI Ruicong2, WANG Jingjing3,4(), MAO Lizeng3,4   

  1. 1.Beijing Key Laboratory of Traffic Engineering,Beijing University of Technology,Beijing 100124,China
    2.Fujian Expressway Group Co. ,Ltd. Fuzhou 350001,Fujian,China
    3.Beijing Municipal Transportation Operations Coordination Center,Beijing 100161,China
    4.Beijing Key Laboratory of Integrated Traffic Operation Monitoring and Service,Beijing 100161,China
  • Received:2023-06-05 Online:2024-08-25 Published:2024-01-26
  • Contact: 王晶晶(1983—),女,教授级高级工程师,主要从事交通信息管理与应用、智能交通等研究。 E-mail:wangjingjing@jtw.beijing.gov.cn
  • About author:翁剑成(1981—),男,博士,教授,主要从事智能交通与大数据建模、交通出行行为等研究。E-mail: youthweng@bjut.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(52072011)

Abstract:

Large scale activities can cause a sudden increase and dissipation of traffic flow in the area around the venue, resulting in occasional and uncertain fluctuations of the road network operation in the surrounding area. The existing methods are insufficient to capture the evolution mechanism of traffic flow under the influence of multi-dimensional factors in special events at the prediction scale. In order to fully exploit the information of time series and influencing factor features of road section speed and effectively deal with the coupling mechanism between different influencing features in speed prediction, this paper proposed a speed prediction model (MC-LSTM) combining Interpretable Machine Learning and Long Short-Term Memory network. Firstly, the study combined the characteristics of large scale activities to construct the set of influencing factors. Then it used the XGBoost algorithm to evaluate the relative importance of the impact of activity scale, nature and other factors characteristics on the speed of road sections around the venue. It quantified the synergistic utility of multiple factors on the operation state of the road network around the venue, fused LSTM networks, considered the time-dependent relationship of traffic state, captureed the temporal correlation of different historical periods, and accurately predicted the speed of road sections around the venue during the activity. MC-LSTM was validated by taking the road network around large scale activities venues in Beijing for six consecutive months. The results indicate that the prediction accuracy of the MC-LSTM model can reach more than 94.5%, which is better than that of XGBoost model considering multiple factors synergism, LSTM model considering only single factor features and the LSTM model not considering external features. It proved that the model proposed in this paper has better validity and stability. This study can provide a decision basis for optimizing the traffic organization of the road network around the large scale activities venues and formulating traffic control and security measures.

Key words: urban transportation, large scale activity, speed prediction, Long Short-Term Memory, XGBoost model, multiple factors synergism

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