Trams in India were started in 19th sanctuary and Chennai was first city to have trams. Over time Kolkata, Mumbai, Kanpur and Delhi got trams. And now Kolkata is only city in India where Trams are still operational. They look awesome on the streets, but hardly in use. They move slow, hence people prefer buses or taxis over tram. This post shares more about trams in Kolkata.
Most of the trams on track seemed empty. They move slowly. It seems that 125 trams are running in Kolkata and many have been discarded over years. Having a ride in these trams on Kolkata streets is an awesome and very different experience. So if you are in city, don't miss a ride in Tram.
Check out https://en.wikipedia.org/wiki/Trams_in_Kolkata for more about trams in Kolkata, different routes, distances etc.