一、引言城市是生产力发展、社会劳动分工深化和生产关系变革的产物,是人类文明进步的象征.作为经济、政治、文化的中心,城市又是社会前进的主要动力.城市公共交通则是现代城市的动脉,是城市活动中不可须臾离的重要手段.作为一种生产力,公共交通与发展国民 I. INTRODUCTION Cities are the product of the development of productive forces, the deepening of social labor division and the transformation of production relations and are symbols of the progress of human civilization. As the center of economy, politics and culture, cities are also the main driving force for social progress. Urban public transport is a modern Urban arteries, an important means of urban activities can not be separated as a productivity, public transport and development of nationals