自从1881年世界上第一辆有轨电车诞生以后,为城市公共交通开创了一个新的时代,20世纪初期已经成为城市交通的主要方式。法国首都巴黎曾经拥有世界上最大的有轨电车系统之一。1928年,线网长度为725km,有轨电车和拖车的总数超过3000辆,年客运量为7.27亿人次。但是后来受到汽车工 Since the birth of the world’s first tram in 1881, a new era has emerged for urban public transport, which became the dominant mode of urban transport in the early 1900s. Paris, the French capital, once owned one of the world’s largest tram systems. In 1928, the length of the cable network was 725 km, the total number of trams and trailers exceeded 3000, and the annual passenger traffic was 727 million. But later by the auto workers