Fundamental Diagrams of Commercial Adaptive Cruise Control: Worldwide Experimental Evidence
Fundamental Diagrams of Commercial Adaptive Cruise Control: Worldwide Experimental Evidence
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DOI：
10.1016/j.trc.2021.103458
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发表时间：
2021-05
期刊：
影响因子：
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通讯作者：
Tienan Li;Danjue Chen;Hao Zhou;Jorge A. Laval;Yuanchang Xie
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文献类型：
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作者：
Tienan Li;Danjue Chen;Hao Zhou;Jorge A. Laval;Yuanchang Xie
世界各地对商用自适应巡航控制 (ACC) 车辆的实验测量越来越多，为研究该技术产生的交通流特征提供了前所未有的机会。本文向该知识库添加了新的实验证据，并通过所得的基本图对 ACC 平衡行为进行了全面的实证研究。我们发现，与人类驾驶的车辆一样，ACC 系统显示出线性平衡的间距-速度关系（在可用数据范围内），但这些关系的关键参数可能与人类驾驶的交通存在显着差异，具体取决于输入设置。在最小 ACC 车头时距设置下，可观察到每小时超过 3500 辆车的平衡容量，以及每小时 100 公里的极快平衡波速。这些快速波浪对于人类驾驶员来说是不熟悉的，并且可能会带来安全风险。结果还表明，ACC 拥堵间隔可能比人流量大得多，这会降低网络存储容量。
Experimental measurements on commercial adaptive cruise control (ACC) vehicles are becoming increasingly available from around the world, providing an unprecedented opportunity to study the traffic flow characteristics that arise from this technology. This paper adds new experimental evidence to this knowledge base and presents a comprehensive empirical study on the ACC equilibrium behaviors via the resulting fundamental diagrams. We find that, like human-driven vehicles, ACC systems display a linear equilibrium spacing-speed relationship (within the range of available data) but the key parameters of these relationships can differ significantly from human-driven traffic depending on input settings. At the minimum ACC headway setting, equilibrium capacities in excess of 3500 vehicles per hour are observed, together with an extremely fast equilibrium wave speed of 100 kilometers per hour. These fast waves are unfamiliar to human drivers, and may pose a safety risk. The results also suggest that ACC jam spacing can be much larger than in human traffic, which reduces the network storage capacity.