Based on an analysis on the present situation and development of three kinds of signal systems ( the point system based on interrogator responsor , the quasi - moving block system based on digital track circuit and the moving block system based on wireless data transmission ) in urban rail transit , some suggestions on the localization of signal system of urban rail transit are put forward 摘要在分析三种城市轨道交通信号系统制式（基于查询应答器的点式系统、基于数字轨道电路的?移动闭塞和基于无线数据传输的移动闭塞）的现状和发展基础上，对实现我国城市轨道交通信号系统国产化提出建议。
