�й���ͨ��չ���ݽ����̼������˼��

本文系统回顾了中国交通系统形成的历史过程及相关研究成果，分析了不同时期交通运输系统的需求特点及其内在原因，研究了中国综合交通系统的布局及运行特点，论文结合作者近年根据中国综合交通发展需要策划组织的几个重大研究项目，分析了它们对于当前中国交通运输研究的意义，评述了部分重要结论的现实意义；论文根据对各时期交通运输系统存在问题的分析与总结，提出了改善综合交通体系规划、建设与运行的政策建议。

Progress and Discussions on Transportation Development of China

This paper reviews the historical shaping process and the research results of the transportation systems of China and analyzes the special demands of the transportation systems in different periods and their intrinsic causations.It studies the overall layout and operation of the comprehensive transportation system of China.The paper then discusses the significance of the research based on some of the recent key programs the author laid and organized to meet the demand of the country's transportation development,and demonstrates the practical application of some major findings.It further analyzes the problems of the transportation systems of all periods and brings forth the policies and suggestions on the improvement of designing,constructing and operating the overall transportation system.