Here are A/c Bus timings from Chennai to Madurai by TNRTC
| Trip Code | Class of Service | Via Route | Route No | Dept. Time HH:MM |
| 0900CHEMADAC | AIR CONDITIONED | TRICHY | 137AC | 09:00 |
| 2100CHEMADAC | AIR CONDITIONED | TRICHY | 137AC | 21:00 |
| 2130CHEMADAC | AIR CONDITIONED | TRICHY | 137AC | 21:30 |