The Northern Railway has introduced Automatic ticket vending machines (ATVM) for buying platform and second class journey tickets with smart card. The ATVMs will be unmanned and operated by the passengers themselves.Informing this in New Delhi today, Railway spokesperson AS Nagi said they had been installed at 30 railway stations in the national capital region. These stations include New Delhi, Hazrat Nizamuddin, Delhi Junction, Anand Vihar, Faridabad, Sahibabad, Delhi Shahdara, Narela, Ghaziabad, Tughlakabad, Delhi Cantt, Meerut City, Sonipat and Gurgaon.Mr. Negi said passengers could buy smart cards from the special counter after paying a security deposit of Rs 50 and it could be recharged with the minimum amount of Rs 20 and maximum of Rs 1,000 at a time. He said this new initiative would not only help passengers in saving time but the Railway would also overcome the problem of currency change at the ticket counters.