According to SWR or in general IR. Freight trains move very slowing in ghats at snail pace, sometime they move back and forth to take pick up. Couple of years back, i saw one one scenario near dudhsagar, they were putting sand on track, i asked the driver who was taking some bio-fertilizer train from goa to ballari, why are you doing this. He replied to provide extra grip on wheels, for freight trains to pull loads and move forward instead of skidding back, while going up the hill from Kulem at Elevation: 77 m to Castle rock at Elevation: 585 m above sea level. Freights take almost takes 3-4 times more time than normal passenger train in ghats. So if we calculate one freight train can restrict 3 pax trains in ghat for around 5-6 hours. Hope after doubling this improves and we can see few more pax trains.