*Erstwhile it was Madurai/Trichy-Bangalore link express via Tiruppattur (PM at MDU and TPJ respectively)
*Then both got separated and Ran as Thanjavur Mysore express via Hosur (cleverly shifted PM to MYS) , Madurai Bangalore express via Tiruppattur (PM at MDU)
*Then Madurai express was extended to Tuticorin (PM at TN) and diverted via Hosur and island express diverted via Tirupattur
*Tuticorin...
more... Bangalore express extended to Mysore
*Tuticorin Bangalore express PM shifted to MYS and Kaveri shifted to MAS