Indian railways needs to improve a lot before doing all these fancy things... we need to concentrate on 1.On time performance 2. Safety 3. Cleaniness 4. Speed ( trains should run atleast 100 km per hour, if not 300 like china or europe).5 Modernisation of railway stations, coaches, engines, tracks etc.
Double decker trains are really a needed for India population... but the concern is Safety, does our railway tracks are really capable enough to handle the weight of these coaches ?