针对当前中国普遍存在的城市快速扩展、新区建设以及越来越严重的城市交通问题，从系统论的角度，提出了中心城市与城市新区间交通协调发展的基本内涵；从技术协调、效益协调、体制协调和功能协调4个方面分析了协调发展的基本要求，并建立了相应的子系统内部和子系统之间协调发展的评价指标体系；与协调发展的基本内涵和评价指标相对应，通过构造协调发展指数模型，探讨了中心城市与城市新区交通协调发展的分析评价．以西安一高陵间交通为例验证了文中提出的理论和方法，结果表明该系统处于初级协调阶段，但其协调发展趋势为增长型

At present, most cities in China are in rapid expansion by constructing new urban districts. At the same time, the traffic problem becomes more and more serious. From the viewpoint of system theory, this paper proposes the basic concept of the coordinated development of the traffic between central cities and new urban districts, analy- zes the basic requirements of the coordinated development in the aspects of technical coordination, benefit coordina- tion, system coordination and function coordination, and builds up two evaluation index systems to respectively de- scribe the internal and the external coordinated transport sub-systems. Moreover, an evaluation model correspon- ding to the basic concept and the evaluation index systems is constructed to evaluate the coordinated development of traffic between a central city and its new urban districts. Finally, by using the traffic between Xi＇an and Gaoling, which is found primarily coordinated but trends to grow, as an example, the correctness of the proposed theory and methods is verified.