The numerous advantages of driving simulators make them a useful research tool. However, validation studies need to be conducted before extrapolating driving simulator results from the laboratory to a real-world driving environment. In this study, validation of mean speeds on curves obtained in a driving simulator was performed by monitoring speed on corresponding real-world curves. A mountainous two-lane rural road in Iran was simulated and the driving speeds of 30 participants were collected at the beginning, middle and end of five curves in the simulator. The driving speeds of 40 different participants were also measured at specified points of five curves in the real road using a radar gun. The curves studied included a horizontal curve on a positive grade, three combined crest curves and one combined sag curve. The results of bilateral z-tests indicated that both experiments belonged to the same population and independent t-tests indicated equality of variances for all curves. In most curves, except the combined crest curve with a radius of 300 m, the mean speeds in the driving simulator were higher than the real-road condition. The trends in speed variation from the beginning to the end of the curve were similar in both experiments.

中文翻译：

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双车道乡村道路弯道速度研究的驾驶模拟器验证

驾驶模拟器的众多优势使其成为有用的研究工具。但是，在将实验室的驾驶模拟器结果外推到现实世界的驾驶环境之前，需要进行验证研究。在这项研究中，通过监测相应真实世界曲线的速度来验证驾驶模拟器中获得的曲线的平均速度。模拟了伊朗的一条山区双车道乡村公路，在模拟器中收集了30名参与者在5个弯道的起点、中途和终点的行驶速度。还使用雷达枪在真实道路上的五个弯道的指定点测量了 40 名不同参与者的行驶速度。研究的曲线包括正坡度上的一条水平曲线、三个组合的波峰曲线和一个组合的凹陷曲线。双边的结果z检验表明两个实验属于同一总体，独立的t检验表明所有曲线的方差相等。在大多数弯道中，除了半径为 300 m 的组合峰顶弯道外，驾驶模拟器中的平均速度均高于实际路况。在两个实验中，从曲线开始到结束的速度变化趋势相似。