Capacity Analysis and Improvement of Roundabout in ZiLinAn Intersection of Guiyang City

This paper considers the transportation situation in Zilinan intersection of Guiyang City.Base on a lot of investigation data of traffic volume and other related data,we analysis and compute the capacities on signal roundabout and signal intersection,respectively.Compared two cases,the latter's capacity and the ability that it eases traffic jams and so on is better than the former.Therefore,the idea that the signal roundabout will be changed into the signal intersection is reasonable and feasible.