how many time next step change the automatic doors function rajdhani shatabdi hamsafar duronto smpark kranti .indian railway after sucess in speed limt 130kmh to 180 kmh changing and challenged . track both side no railway wall public living area for save accidents pepoles and animals. plastic items chips plastic cold drinks not allowed in indian railway menu . used only sand tools and eco green revolution kulad (sand product) tea is great in india railways .and banana plates for served foods