avg speed 52 km/hr can be increased to 68km/hr. May be possible. This train has to follow any highspeed train. Let example.. Any superfast starts from MAS and runs towards NDLS with out stops with avg speed of 65Km/hr then immediately this andaman follows the above train with out any signal gap. Means First train runs with out stops the same cleared signaling guides the andaman with high speed. Hope that logic will work for some series of trains on long streatch.