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Publications
Xu, XQ., Yan, X., Wu, B., Teixeira, A.P. and Guedes Soares, C. (2024), Maritime traffic complexity evaluation in the Yangtze River using AIS Data, Advances in Maritime Technology and Engineering, Guedes Soares, C. & Santos T.A. (Eds.), Taylor and Francis, London, UK, pp. 159-164.
Traffic complexity evaluation is an element of marine situation awareness that plays a critical role in ensuring navigation safety. This paper proposes a method for evaluating marine traffic flow complexity using AIS data that can be used by marine supervisors in vessel traffic service (VTS) centers to enhance the understanding of the marine traffic condition. The traffic flow complexity is evaluated in three steps, including data preprocessing, weight determination and traffic complexity modelling. First, abnormal AIS data are deleted and then the remaining data are synchronized. Second, the distance between all ship pairs is calculated using AIS data and an exponential function of the distances is adopted as weight to express the relationship among the ships. Third, the graph theory is introduced to describe marine traffic conditions, and the indicators edge density and strength are used to evaluate the complexity. The experimental results in a selected section of the Yangtze River show that the proposed method can quantitatively evaluate the marine traffic complexity and effectively strengthen the marine traffic condition situation assessment by the VTS operators.
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