单线双方向运行自动闭塞存在的问题及改进方案

The Problem and Improvement of Single Track Automatic Block With Double Direction Running

对单线双方向运行自动闭塞的电路改造中，遇到的问题及解决方法进行了阐述。

Some questions,met in the improvement on the circuit of single track either direction antomatic block,and the relevant solutions are put forward in this paper.