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为了探索山区单线线路区段安全、扩能的新途径,1990年铁道部决定由成都铁路局和中国铁路通信信号总公司共同合作,对单线定点计轴自动闭塞进行系统研究,安排了宝成线广元至马角坝101km正线、13个车站、12个区间的定点计轴自动闭塞试点工程。1991年3月该工程按期完成并投入使用(照片),缓解了该区段运输能力紧张的状况,为我国单线线路自动闭塞的发展,创造出一条新的途径。
In order to explore a new approach to the safety and capacity expansion of single-lane line in mountainous areas, the Ministry of Railways decided in 1990 to jointly research on the automatic blockade of single-line fixed-point axis by cooperating with Chengdu Railway Administration and China Railway Communications Corporation to arrange Baocheng Line Guangyuan to Ma Kok Dam 101km line, 13 stations, 12 sections of the fixed-point axis automatic blocking pilot project. The project was completed and put into use on schedule (photos) in March 1991, easing up the tense transport capacity of the sector and creating a new avenue for the development of the automatic blockage of single-lane lines in our country.