It go whichever route bhai but as per END to END Avg speed=Distance/Time giving less than 55Km/hr so it was discussion about its SF status while compared to Amaravati Exp which have Avg Speed little more than this.you might saw my post about both trains Avg Speed i posted.If you say about KR route for Vasco-Patna SF than Amravati EXP Runs on Vishakpatnam-howrah route which is one of the Premeir Electrified Route for speedy trains.Route doesnt matters its something alag Chakkar hai for SF status and khair jane do usse kya matlab ab its all IR decisions they can do whatever they feel good.