2020
Letter No.	Date	Subject
2013/Sig/G/2/RDSO	09.03.2020	Provision of Signals on Gantry
2019/Sig/26-A/SCR/04	01.05.2020	Starter Indicators at Platforms
2019
2018/Sig/31/11-RE- Matters.	05.02.2019	Special requirement of Signaling in 25 KV AC RE Area- Maximum permissible length of Direct Feeding of Signals in case of LED Lamps.
2017/Sig/SEM-II/Misc	12.09.2019	Condonation of Signal Locations having less spacing between OHE structure and Signal Post
2017
2017/Sig/2/Double Distant Aspect.	05.05.2017	Display of Top Yellow in case of blanking of Bottom Yellow (Caution Aspect) for Inner distant signal in double distant signal.
2015
2015/Sig/84th SSC Meeting	05.11.2015	84th Signal Standards Committee Meeting.
2008
2001/SIG/SGF/12(LED)	07.10.2008	LED Signal