but for a passenger it is a big deal lol. Sir i talked to a locopilot once that how you operate locomotive he told evrything then i also asked that why kgm shtabdi kgm ddn express and all the express from kgm are hauled by wdm 3A he told the tracks are rated for speed less than 100 thats why we use wdm 3A for express and wdm 2 for passngr trains