What are the subways like in your country?

わたしのとしでちかてつがあまりいいではありません。わるいです。

We dont have many subways in my city though it is capital city of a population of 10 Crores people. The subways are not clean and neat. They stink . I do not take sub-ways usually.

I have seen overcrowded trains in India on TV...must be a lot of subway commuters!

You may have seen in other cities like Mumbai or Delhi, my city is Hyderabad and we do not have any subways here.

日本はインドよりDevelopedところとおもいます。

In my city, the subway is too crowded some time. too many people in few trains. They are dirty, because some people bring food to inside. It must be prohibted.

Subways in Germany seem to be very similar to the ones in Japan, judging from the video. You'd probably feel quite at home.

Every major city has subways, or rather a combined network of subways (U-Bahn) and "city-trains" (S-Bahn). Regardless of the name, both use underground tracks in the very city center, but tracks above ground outside of the city center. The reach seems to be comparable to the Tokyo subway network, but as the German cities are not quite that big, they connect to other towns in the region around the city where people live and commute to work in the city. Here's a "Netzplan" of the Rhein-Main region around Frankfurt:
http://www.rmv.de/linkableblob/de/31950-59820/original/RMV-Schnellbahnplan.jpg

Trains are usually punctual, though because of accidents or construction work sometimes they can run late. They are not as crowded as in Tokyo. Also, there's no fence that aligns to the train door as seen in the video, and train cars don't have that many doors. The stations and cars are reasonably clean, though you can occasionally see grafitti and other vandalism. But I wouldn't describe them as "pretty", more like "utilitarian".

The subways are safe. There's no groping at all. Single incidents can happen, like groups of young men ganging up and attacking a single person, but that can also happen outside of the subway. It's just because of the security camera footage that media coverage is a lot greater. There's no ticket barrier, so you can see homeless people from time to time, but I can understand that they would rather be nice and warm instead of out in the rain. I've never been afraid when using the public transport system.

Bigger stations do have shopping arcades, though not as pretty as the ones in the video. Small shops that sell food are also common, even sometimes on the platforms themselves. A few of the bigger department stores are also directly connected to the subway station, as mentioned in the video.

Here's an amateur video (shaky camera): http://www.youtube.com/watch?v=mVuzB3lvTaU

If you search Youtube, there are probably more and better videos.

I had no idea how the Brazilian subways were. Thanks for the info!

Thank you Dirk for the in-depth info about the subway system in your country. The trains looked very clean and neat and also quite organized.

You mentioned there were not ticket gates. Does that mean conductors come to check tickets? 

Yes, there are conductors, but not in every train. If you don't have a ticket, you have to pay a steep fine. There are also conductors without uniform.

I guess people who don't want to pay would just climb across ticket barriers, so it's probably more effective this way.