Train colors lets hav different colours for different engines &wife possible for rakes too say rajdhanis all hav red durontos all have white I mean powder coated not painted so that the beauty shows and it makes a touching point with its respective passengers the choice of insignia and it's colour coding should be carried across India with the choice maintained across all durontos or shatabdi express etc so that people can identify if it's premium or fast to super or express think about it