Data underlying the publication: Speed behaviour upon approaching freeway curves

High Frequency Floating Car Data was collected to analyse circa 1 million individual speed profiles on 153 Dutch freeway curves. By defining the positions where the acceleration approaches 0 m/s2 before and after a curve starts, the positions when the driver started and stopped decelerating upon curve entry were defined. These positions and speeds are put in a database, combined with detailed reconstruction of the curves and their surroundings, as well as three dimensional sight distance analysis. This aggregated database is shared here, along a file explaining the different variables in the database.<br>More backgrounds can be read in:<br>Vos, J., Farah, H., &amp; Hagenzieker, M. (2021). Speed behaviour upon approaching freeway curves. Accident Analysis &amp; Prevention, 159, 106276. doi: https://doi.org/10.1016/j.aap.2021.106276

本研究采集了高频浮动车数据（High Frequency Floating Car Data），用于分析荷兰153条高速公路曲线上的约100万条独立行驶速度剖面。通过定义曲线前后加速度趋近于0 m/s²的位置，确定了驾驶员驶入曲线时开始减速与停止减速的位置。将上述位置、对应车速，与曲线及其周边环境的详细重构数据、三维视距分析结果一同整合存入数据库。本聚合数据库已在此公开，并附带一份说明数据库各变量含义的文档。

更多背景信息可参阅：
Vos, J., Farah, H., & Hagenzieker, M. (2021). 高速公路曲线路段的驾驶速度行为. 事故分析与预防（Accident Analysis & Prevention）, 159, 106276. doi: https://doi.org/10.1016/j.aap.2021.106276