The Kolkata Metro inaugurated in 1984 marked the beginning of India's metro journey.
The Delhi Metro Rail Corporation announced that the month-long online survey.
The Delhi Metro will introduce an additional 40 train trips on weekdays, commencing this Wednesday.
The Tourist Smart Cards come in two variants: One-day validity and three-day validity options.
To access the service, Delhiites need to add the official WhatsApp number of DMRC (9650855800) to their contact list.