Bahi vo single line ka jyada issue nahi hai...trains hi kitni hai us line pe.. abhi bhi assam me katihar k aage tak ka to single line hi tha .. kai jagah india me tha aur even hai bhi fir bhi bahut trains chalti.. uska koi khas issue nahi hai.. TT bhi 1.5 hrs ka mil skta h which is still not so bad