Through systematically analyzing Xi＇ an South 3rd ring-Chang＇ an road joint including status analysis, planning analysis, traffic analysis and prediction, the paper puts forward two overpass design schemes at joints. Through analyzing and comparing schemes, it finally deter- mines optimal scheme, with a view to effectively improve overall operation ability of the road network and to release local traffic pressure.%通过对西安市南三环一长安路节点处的系统研究，包括现状分析、规划分析、交通分析与预测，提出两种节点处立交设计方案，经对方案分析比较最终确定出最优方案，以期有效提高路网整体通行能力，缓解当地交通压力。
展开▼
