The Chennai Egmore–Thanjavur main line (via Kumbakonam ) connects Chennai Egmore and Thanjavur Junction both in the Indian state of Tamil Nadu. The Chennai Egmore–Thanjavur main line is part of Chennai–Viluppuram–Chidambaram-Mayiladuthurai–Kumbakonam–Thanjavur–Tiruchirappalli line. There are several branch lines (included here): Chengalpattu–Arakkonam links to Chennai Central–Bengaluru City line, Guntakal–Chennai Egmore section, Viluppuram–Puducherry, Cuddalore–Virudhachalam, Mayiladuthurai–Thiruvarur, and Peralam–Nagapattinam sectors. The line connects the Kaveri delta to Chennai.