BSP BGKT BKN Ko LHB isliye diya gaya taki BSP me LHB Maintenance ka base ban sake aur BSP RAJ Ko LHBFICATION kara jaa sake LHB karna RB ki priority hai taki trains ki atleast Avg speed badhai jaa sake jis se delay kam se kam ho sake sabhi trains me LHB ICF se lighter hai so usko accelerate karne me M4 aur P4 bhi jyada samay nahi lagate, har train ko HIGH SPEED 160 nahi dena hai kuch trains ko avg speed, kuch ko premium category, aur kuch ko safety aur comfortable ke liye LHB diya jata hai. agar aapko LHB sirf HIGH SPEED ke liye chahiye to fir to NR ke alawa kisi bhi zone ko LHB nahi dena chahiye na hi duranto ko na hi Rajdhani ko kyonki jahan tak mujhe pata hai MUMBAI HOWRAH DURANTO BSP RAJ MAO RAJ jaisi trains bhi High speed run nahi deti.