Smart card
The Smart Card looks similar to a debit card, issued by CMRL at ticket counters for Rs. 100 currently. This Rs. 100 includes Rs. 50 refundable deposit, and Rs. 50 travel value. The travel value can be used to purchase platform and travel tickets for the Chennai metro trains. The smart card is valid for 6 months from the date of purchase and the extra amounts of travel value can be recharged whenever needed. It is found that very few people are using this smart card and many ticket vending machines which work on Smart cards do not function properly.