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自動駕駛車輛換道意圖識別研究現狀

Current status of lane change intention recognition for autonomous vehicles

  • 摘要: 近年來基于數據驅動的自動駕駛車輛換道意圖識別研究取得了顯著進展,學者們發布了大量的研究成果. 針對該領域面臨的一些共性的技術挑戰,如換道過程的認定、換道標簽的缺失以及數據類別不均衡等問題,從不同的數據驅動方法進行分類,主要包括基于傳統機器學習、基于深度學習和基于集成學習的換道意圖識別方法,對近年來這些方法的研究成果進行了回顧和總結. 關于換道行為的認定,存在兩種主流方案,即車輛穿越車道線和未穿越車道線. 對于未穿越車道線的車輛,主要應用于駕駛者換道意圖的早期識別方法;而當車輛穿越過車道線時,則通常被用于完整的換道過程的識別. 在換道意圖標注的研究中,研究者們針對固定時間窗口和航向角閾值對標注精度的影響進行了深入探討. 為了找到最優參數,如最佳的固定時間窗口和航向角閾值,研究者們采用了網格搜索進行尋優. 雖然這種方法在固定的駕駛場景中表現良好,但在不同的駕駛場景中,如何實現參數的自適應調節仍然是一個挑戰. 針對換道數據類別不均衡的問題,研究者采用兩種策略:一是調整數據采樣方法,利用欠采樣和過采樣技術平衡各類別樣本數量;二是采用對不均衡數據適應性強的分類模型,如集成學習算法或代價敏感學習,以維持較好的分類性能.

     

    Abstract: In recent years, with the rapid development of big data and artificial intelligence technology, data-driven automatic driving vehicle lane change intention recognition has become an active research area in the transportation field. Numerous studies have reported innovative and practical research results. However, this field still presents common technical challenges, such as accurately identifying the lane change process, handling missing lane change labels, and addressing imbalanced data categories. These issues remain the focal points of current research. This paper aims to classify and organize various data-driven methods, mainly focusing on lane change intention recognition methods based on traditional machine learning, deep learning, and ensemble learning. In the academic community, two primary approaches exist for identifying lane change behavior. The first approach mainly focuses on the vehicle not crossing the lane line, which is suitable for early recognition of the driver’s intention to change lanes. The second approach focuses on the actual crossing of lane markings by vehicles, which is often considered the complete lane change process. In academic research on lane change intention annotation, the selection of fixed time windows and heading angle thresholds plays a crucial role in the accuracy of annotation. These parameters affect the accurate recognition of lane change behavior and are directly related to the stability and reliability of autonomous driving and intelligent transportation system performance. Therefore, researchers have conducted in-depth investigations on the impact of these two parameters on annotation accuracy. To identify the optimal fixed time window and heading angle threshold, researchers have used the grid search optimization algorithm. This method performs well in fixed driving scenarios by traversing all possible parameter combinations and selecting the optimal parameters according to preset evaluation criteria. However, in practical applications, driving scenarios often exhibit diversity and complexity. Different driving environments, road conditions, and driving styles can impact the recognition of lane change intentions. Therefore, achieving adaptive parameter adjustment so that the annotation algorithm maintains high accuracy across various driving scenarios remains a challenging problem. To address the issue of imbalanced data categories in lane changing, researchers adopt two strategies. The first strategy involves adjusting the data sampling method, and under-sampling and oversampling techniques are used to balance the number of samples in each category. The second strategy involves the use of classification models with strong adaptability to imbalanced data, such as ensemble learning algorithms or cost-sensitive learning models, to maintain good classification performance.

     

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