New Delhi, Feb. 13 -- The Union Government has sanctioned 29 rail surveys covering a total of 2,501 km in Tamil Nadu over the last four years, including six new lines and 23 doubling projects, but their execution hinges on the support of the State Government, according to the Ministry of Railways on Thursday.

Speaking in the Rajya Sabha, Vaishnaw highlighted the progress of recently completed projects in Tamil Nadu.

"Some of the recently completed projects falling fully or partly in Tamil Nadu include the Dindigul-Palani-Pollachi gauge conversion (121 km) at a cost of Rs 610 crore, Pollachi-Palghat (56 km) at Rs 350 crore, and Quilon-Tirunelveli-Tiruchendur (357 km) at Rs 1,122 crore. Other projects include Mayiladuturai-Thiruvarur-Kara...