The lightweighting of passenger coaches causes fuel saving, lesser wear and tear of moving parts, enhanced life of the assets like track and rolling stock, reduced CO2  emission due to lesser fuel consumption, and increased speed. Hence it is high on Indian Railways’ priorities. GFRP (Glass Fibre Reinforced Polymer) composite, the most cost-effective option in FRP composite family is being used for interior of all AC coaches of Indian Railways. GFRP covers interior side panels, floors, roof sheets, windows, seats and berths, AC troughs, lavatories etc.