公路之间的平面交叉是阻碍交通的主要因素之一。解决的办法,最好是修建互通式的主体交叉。但根据我国具体情况,近期只能少量试建,远期也只能在高速公路及两条交通量均较大的公路交叉处修建。公路之间的交叉型式大量的还是平面交叉。所以,如何提高车辆在平面交叉口的通过能力,对促进 Crossing between roads is one of the main obstacles to traffic. The solution, it is best to build interoperability of the main cross. However, according to the specific circumstances of our country, only a small amount of pilot projects will be conducted in the near future, and the long-term construction will only be possible on expressways and two road intersections with large traffic volume. A large number of cross-type between the road or plane crossing. So, how to improve the passing ability of vehicles at the plane intersection, on the promotion