Indian Railways has sanctioned final location surveys for six lines in Tamil Nadu. They are
- Chennai-Arakkonam 5th and 6th line
- Arakkonam Renigunta-5th and 6th line
- Chennai-Gudur 5th and 6th line
- Villupuram-Tiruchirapalli-Nagercoil 3rd and 4th line
- Palakkad-Pollachi-Podanur doubling
- Tiruchirapalli-Karaikkudi-Manamadurai-Madurai doubling
This was conveyed by Union Railway Minister Ashwini Vaishnaw in a letter to Dr L Murugan, Union Minister of State for Information & Broadcasting and Parliamentary Affairs.
