Yes so that might be the reason they using 60kg rails in this stretch but han these are not for speed upgradation these are just for heavy freights running on this section. But i hope speed is also going to change for all express trains as once entire route gets doubled. As of now lot of express trains are struck with crossings and lags in speed over this section.Lonf before i heard daily this NTPC kudgi palnt itself need 10 -13 rakes of coal so it shows daily frieght transport for this plant in this section will be 13 loaded+13 empty=26 rakes between Hotgi-Gadag-Guntakal