[1][2] It the major junction of the Chettinad region and the surrounding areas of Sivaganga district.

[12] It houses offices of ADEN, JE(P.way) and SSE TRD at Karaikkudi for regular train operations.

Madurai–Melur–Tirupattur–Karaikudi new BG line: Reconnaissance Engineering cum Traffic Survey for a new BG line between Karaikkudi and Madurai via Melur and Thirupattur (85.70 km) was conducted and Survey Report was sent to Railway Board on 27.11.2014.

Karaikudi-Natham-Dindigul new BG line: Reconnaissance Engineering cum Traffic Survey for a new BG line between Karaikkudi and Dindigul via Thirupattur and Natham (105.60 km) was conducted and Survey Report was sent to Railway Board on 06.07.2015.

Karaikudi-Devakottai-Ramanathapuram-Tuticorin new BG line: Reconnaissance Engineering cum Traffic Survey for a new BG line between Karaikkudi and Tuticorin via Devakkottai and Ramanathapuram (214.81 km) was conducted and Survey Report was sent to Railway Board on 30.08.2011.