Sealdah local at Dum Dum Stn. Dum Dum is definitely *the* place to disembark if you have a train terminating at KOAA (Kolkata Jn (formerly Chitpur). KOAA is in a bad location and has terrible public transport. If you can get off at Dum Dum, you can take a Metro rail from adjacent platform (thru underpass) or local EMUs to Sealdah / Barrackpore or taxi / bus. Most trains have an unofficial halt for 1 minute at Dum Dum especially to wait for green signal to KOAA. Many others go very slow. My train (13168 from AGC to KOAA) went slowly and I was able to get off safely.