随着资本主义国家经济的畸形发展,汽车保有量逐年大量增加,致使城市交通阻塞。污染、噪音的公害及燃料短缺的严重威胁,改革城市运输体系的问题已迫在眉睫。六十年代来,公共汽车运输又逐渐得到重视,其性能、结构、外观等方面都有所改进。不少国家还研究发展了新一代的公共汽车。 With the abnormal development of the capitalist countries’ economies, the number of car ownership has increased substantially year by year, causing traffic congestion in the cities. Pollution, noise pollution and a serious threat of fuel shortage, the reform of urban transport system is imminent. Since the 1960s, the transportation of buses has been gradually paid attention to, and its performance, structure and appearance have been improved. Many countries also study and develop a new generation of buses.