Southern Railway has announced that the following trains would be run with newly commissioned DEMU (Diesel Electric Multiple Unit) rakes replacing the existing conventional rakes. The Tiruchi – Vriddhachalam passenger (56808) would be run with DEMU rakes with effect from May 7. The Vriddhachalam- Salem (56835), Salem- Vriddhachalam (56838), Vriddhachalam–Salem (56837), Salem–Vriddhachalam (56836), Vriddhachalam–Cuddalore Port Junction (56834) and Cuddalore–Tiruchi (56805) passengers would be operated with DEMU rakes with effect from May 8, a release here said.