从驾驶安全性和驾驶员短期记忆特性两个方面综合考虑高速公路限速标志的设置间距。采用室内实验的方法,对驾驶员的短期记忆衰减规律进行研究,建立驾驶员短期记忆衰减规律指数模型,并将此结果应用于高速公路限速标志的设置过程中。根据高速公路的不同限速值,定量给出高速公路限速标志的合理设置间距。 From the driving safety and short-term memory characteristics of drivers comprehensive consideration of highway speed limit set the spacing. The method of indoor experiment is used to study the driver’s short-term memory decay law, and the driver’s short-term memory decay law index model is established. The result is applied to the setting of speed limit sign of expressway. According to the different speed limit of the expressway, the rationally setting distance of the speed limit sign of the expressway is given quantitatively.