Railway police DGP C Sylendra Babu, who was heading the TN Prisons in 2017, said that the revenue generation model has been working well in the jails across the State. “At that time, we had initiated a petrol bunk project and some of the fuel stations are still functional. These kind of projects help generate revenue,” he added. Apart from revenue generation, jails in the State also help inmates with vocational training. Those who complete it get a diploma, which, from a TN jail, is one of the most prestigious and respected here, the official added.