will be useful to people who board trains from halts or small stations which have platforms literally at ground level and it becomes a nightmarish task especially for women & elders to board the train from that low level platform. Now for this hydraulic step two things would be needed, first loco having very power compressor to maintain hydraulic pressure in the stair case as well as in the break pipe of coaches. Currently only freight locos have that much power compressor. Second, modification in high level platforms otherwise the stair will collide with it.