Aapka wrong thinking Hai ki LHB speed ke liye Diya ja Raha Hai... LHB is given for safety purpose.
ICF coaches are deadly in accidents.
LHB coach and loco allocation ka koi relation nahi Hai. Loco allocation is done by different department.
And secondly speed upgradation depends on various factors. Rajdhani get highest priority always . So even if there is...
more... an LHB train then also Rajdhani would overtake it because it is Rajdhani.