I hope they have that signboard in hindi too.At least they are making an attempt to keep the metro clean.And if this doesnt work then there is always the policeman near the entrance.

The Scharfenberg coupler was developed some time just after World War II in Germany. The idea of it is that you can couple two units physically and electrically through one coupling (instead of a usual coupler and cables). Also, this can be done automatically and within seconds - one vehicle must simply slowly approach another until their couplers meet.

The technology used in this kind of Couplers is one of the best foolproof technology.

I zoomed up the high res image and the coupler reads "Schaku" which is most likely the name of the German manufacturer. All I know about a Scharfenberg coupler is that it helps in automatic coupling.

Yes, there are instruction and announcements both in Hindi and English - on the stations as well in the trains.

Hope there is also an English version of it.

Looks like a Scharfenberg coupler.

Yes. The catenary maks is similar. Can anyone tell us differences? Thanks!

Seems like the metor uses the same caternary arrangement as the Indian railways.