[6] Later, Indian railways introduced a Duronto Express between Chennai and Coimbatore in 2011.

[7][8][9][10] The 12243/44 MGR Chennai Central–Coimbatore Junction Shatabdi Express presently has 1 Executive class, 7 AC chair car and 2 end-on generator coaches.

By comparing with distance written on Chennai Division Map on Southern Railway website and distance written in timetable of a train having stoppages at AVADI and HINDU COLLEGE(H) on official website (If there is no reserved train having stoppages at both places, please view where schedule of unreserved trains is available on official website to verify because you don't find anything if you view the place on official website where only reserved train schedule is available.

), the chargeable distance is increased by 6-7 km between AVADI and HINDU COLLEGE(H) and by comparing with distance written on Chennai Division Map and Salem Division Map both on Southern Railway website taking together, and on the other hand, distance written in timetable of a train on official website having stoppages at JOLARPETTAI and TIRUPATTUR JN (If there is no reserved train having stoppages at both places, please view where schedule of unreserved trains is available on official website to verify because you don't find anything if you view the place on official website where only reserved train schedule is available.

Maybe the reason behind increasing is higher cost for special railway infrastructure of these regions (not sure).