Doubling itself will take 4-5yrs depending on funds allocation. This line is not in list of 130kmph upgradation for the next 3-5 yrs target and we can expect the GQ lines EW NS lines to be 130kmph. So expecting 3hrs near future is far sighted just think of doubling and all trains maintaing 4-4.5hrs running time as traffic increase in coming years.