Variable speed limit (VSL) control dynamically adjusts the displayed speed limit to harmonize traffic speed, prevent congestions, and reduce crash risks based on prevailing traffic stream and weather conditions. Previous research studies examine the impacts of VSL control on reducing corridor-level crash risks and improving bottleneck throughput. However, less attention focuses on utilizing real-world data to see how compliant the drivers are under different VSL values and how the aggregated driving behavior changes. This study aims to fill the gap. With the high-resolution lane-by-lane traffic big data collected from a European motorway, this study performs statistical analysis to measure the difference in driving behavior under different VSL values and analyze the safety impacts of VSL controls on aggregate driving behaviors (mean speed, average speed difference, and the percentage of small space headway). The data analytics show that VSL control can effectively decrease the mean speed, the speed difference, and the percentage of small space headways. The safety impacts of VSL control on aggregated driving behavior are also discussed. The aggregated driving behavior variables follow a trend of first decreasing and then increasing with the continuous decrease in VSL values, indicating that potential traffic safety benefits can be achieved by adopting suitable VSL values that match with prevailing traffic conditions.

中文翻译：

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基于交通大数据的变速限制控制对综合驾驶行为的安全影响分析

可变速度限制（VSL）控件可动态调整显示的速度限制，以协调交通速度，防止交通拥堵并根据主要交通流和天气情况降低撞车风险。先前的研究研究了VSL控制对降低走廊级碰撞风险和提高瓶颈吞吐量的影响。但是，较少的注意力集中在利用实际数据来查看驾驶员在不同的VSL值下的顺应性以及汇总的驾驶行为如何变化。这项研究旨在填补空白。利用从欧洲高速公路收集的高分辨率逐行道大数据，本研究进行了统计分析，以测量不同VSL值下驾驶行为的差异，并分析VSL控件对总体驾驶行为（平均速度）的安全影响，平均速度差异，以及小空间前进的百分比）。数据分析表明，VSL控制可有效降低平均速度，速度差和小空间行进的百分比。还讨论了VSL控制对综合驾驶行为的安全影响。汇总的驾驶行为变量遵循以下趋势：随着VSL值的持续减小，该值先减小然后增大，这表明通过采用与主要交通状况相匹配的合适的VSL值可以实现潜在的交通安全效益。还讨论了VSL控制对综合驾驶行为的安全影响。汇总的驾驶行为变量遵循以下趋势：随着VSL值的持续减小，该值先减小然后增大，这表明通过采用与主要交通状况相匹配的合适的VSL值可以实现潜在的交通安全效益。还讨论了VSL控制对综合驾驶行为的安全影响。汇总的驾驶行为变量遵循以下趋势：随着VSL值的持续减小，该值先减小然后增大，这表明通过采用与主要交通状况相匹配的合适的VSL值可以实现潜在的交通安全效益。