Section 37(1) in The Bangalore Metro Railway (General) Rules, 2011
(1)Door open indicator -(a)when platform screen door or platform edge door is under opening and closing process, the door opening indicator flashes and chime is activated,(b)when platform screen door or platform edge door is under fully opened position, the door opening indicator is illuminated and chime is deactivated;(c)when platform screen door or platform edge door is under closed and locked position, the door opening indicator is extinguished and chime is deactivated.
