摘要
系统介绍了世界地铁与轻轨发展历史、现状及趋势，分析了城市轨道交通发展的深层次原因，指出我国城市轨道交通发展的必然趋势。
The author introduces the history and trends of the development of urban rapid rail transit all of the world, and analyzes the propelling power and causes for the development of urban rapid rail transit.
关键词
地铁
轻轨
发展趋势
发展动因
城市轨道交通
metro, light rail transit, trend of development, cause of development
