| Start | End | |
| Sub-Ring 1 | Salem (400) | Unjanai |
| Unjanai | Pudunchandai | |
| Pudunchandai | Deviakurichi | |
| Deviakurichi | Salem(230) | |
| Salem(230) | Sail | |
| Sail | Salem (400) | |
| Sub-Ring 2 | Thiruvarur | Thanjavur |
| Thanjavur | Trichy | |
| Trichy | Samayapuram | |
| Samayapuram | Pugalur(230) | |
| Pugalur(230) | R.N.Puram | |
| R.N.Puram | Trichy (Alundur) | |
| Trichy (Alundur) | Pudukkottai | |
| Pudukkottai | Thiruvarur | |
| Sub-Ring 3 | Kayathar | Udayathur |
| Udayathur | Sankaneri | |
| Sankaneri | S.R.Pudur | |
| S.R.Pudur | Tirunelveli | |
| Tirunelveli | Kayathar | |
| Sub-Ring 4 | Udumalpet(400) | Kadamparai |
| Kadmparai | Udumalpet(230) | |
| Udumalpet(230) | Udumalpet(400) | |
| Sub-Ring 5 | O.K.Mandapam | Anikadavu |
| Anikadavu | Ponnapuram | |
| Ponnapuram | Sadayapalayam | |
| Sadayapalayam | Palladam | |
| Palladam | O.K.Mandapam | |
| Sub-Ring 6 | Ingur | Gobi |
| Gobi | Pushep | |
| Pushep | Arasur | |
| Arasur | Ingur | |
| Sub-Ring 7 | Mettur Thermal P.H. | Mettur Tunnel P.H. |
| Mettur Tunnel P.H. | Mettur | |
| Mettur | Mettur Thermal P.H. | |
| Sub-Ring 8 | Villupuram | T.V.Malai |
| T.V.Malai | S.T.C.M.S. | |
| S.T.C.M.S. | Eachenkadu | |
| Eachenkadu | Merambalur | |
| Merambalur | Neyveli T.S.I | |
| Neyveli T.S.I | Villupuram | |
| Sub-Ring 9 | Sri Perumbudur | Nokia |
| Nokia | Sipcot | |
| Sipcot | S.V.Chatram | |
| S.V.Chatram | Oragaddam | |
| Oragaddam | Sri Perumbudur | |
| Sub-Ring 10 | S.P.Koil | Siruseri |
| Siruseri | Veerapuram | |
| Veerapuram | Kalivanthapattu | |
| Kalivanthapattu | Kits | |
| Kits | Tharamani | |
| Tharamani | S.P.Koil | |
| Sub-Ring 11 | Sri Perumbudur | Kadaperi |
| Kadaperi | Koyambedu | |
| Koyambedu | Mylapore | |
| Mylapore | Tondiarpet | |
| Tondiarpet | Manali | |
| Manali | K.W.W | |
| K.W.W | Korattur | |
| Korattur | Sri Perumbudur | |