CHENNAI, July 21: The second line passenger traffic between Thiru Mayilai and Chepauk on the Mass Rapid Transit System (MRTS) here, has got the apporval of the Commissioner of Railway Safety. After inspection of the track, the commissioner suggested some changes before operating the services. He also called for more amenities for passengers in the three stations of Tiruvallikeni, Light House and Thiru Mayilai.