Waise 130 upgrade kaafi costly work hai..
52 kg rails ke jagah high density 60 kg rails lagane padte hai..sleepers ki quality alag hoti hai..
Aur unka maintenance Bhi bahut hard aur expensive hota hai..
Jab tak railway ko jarurat mehsus nahi hogi tab tak nahi upgrade hoga aur waise Bhi railway ghaate mein chal rahi hai..