Speed trial to Hansdiha - Bhagalpur ka mainly bahut baar hua hai. Hansdiha - Dumka ka shayad 1 baar speed trial aur ek baar electrification ka trial and CRS hua hai. Sectional speed badhaane ke liye trials hona hai.
Aapka matlab loop line hoga, pit line ka doubling/crossing se koi matlab nahi hai. Freight trains ke liye doubling jyada behtar hoga. Agar loop lines par dependency hogi to fir long loop lines banana padega nahi to passenger trains ko freighters ka wait karna padega loop par.