Guwahati, Nov 19 (PTI) The services of the country’s longest train, Vivek Express, that connects Assam with the southernmost tip of Tamil Nadu will be available twice a week beginning November 22, a Northeast Frontier Railway (NFR) said on Saturday.The Dibrugarh- Kanyakumari Vivek Express, which was flagged off on November 19, 2011, covers a distance of 4,189 km and traverses through nine states in over 80 hours.Train no. 15906 (Dibrugarh – Kanyakumari) Vivek Express which previously used to run on Saturdays, will now operate additionally every Tuesday from November 22, a press release issued by NFR said.Train no. 15905 (Kanyakumari – Dibrugarh) Vivek Express which currently runs only on Thursdays, will now be available even on Sundays from November 27, the release said. PTI SSG MM MM