It reduces traffic jam problem on road. I prefer metro as compare to bus and auto specially in delhi because it reduces time and money both. Many of the employees and students also prefer metro because metro is very cheap as compare to other transportation. One important thing is that environment in metro is very healthy and safe. There is two ways for purchasing the metro ticket one is token system and another way is metrocard. There is benefit of metrocard is that you may recharge it one time from counter and enjoy your journey after that you don’t need to making queue for purchasing tickets. So you should also prefer metro during journey.