IR WDP-4D 40172Kochuveli Kerala Kochuveli

Very nice! What will happen to all the diesels (particularly the more recently built units)?

@Maersk.146 the older ALCos will be grounded.. Even many WDM-3Ds and a few WDG-4s have been grounded.. As of now, there are a few routes to get electrified. The WDP-4Ds will be utilised for those routes and replace the WDG-3As. The WDG-3As will also serve a few routes, and will power some freight trains..
A thing to be noted is that, even if the routes are being electrified, due to shortage of passenger electric locos,some trains still get Diesel locos. This will continue till the shortage is resolved.

@doctortrainspotter - Thank you, that makes sense. It's an enormous project.