Safety lateral clearance of expressway median

In order to research the median safety lateral clearance of expressway, the speed data of overtaking lane and respective inside clearances data of vehicles were collected on some typical sections expressways. This paper studied the relationship between the inside clearance and the speed of different vehicle types by using mathematical statistics, analyzed the effect of curb on the inside clearance, put forward the median safety lateral clearance of expressway from safety angle. The results show that the relationship between vehicles£§ inside clearance and speed is linearity, and the vertical curb situated outboard of corrugated beam barrier has an effect on vehicles£§ safety lateral clearance, and the current specification for safety lateral clearance between median and corrugated beam barrier in China is insufficient. 3 tabs, 5 figs, 12 refs.