Dear brother, Satragachi is very near to Rabidrasadan Metro. It is 10 minutes in car via 2nd Hooghly bridge where Howrah is 30 miutes in car if no traffic jam arises. Shalimar is opposite to Khiddirpur or Gardenreach. I think SRC or Shalimar is convenient to South Kolkata. Probably North suburban is far. North suburban can go to SRC via NH6 Bombay Road Rajchandrapur, Kona, Salap by car minimum 45 minutes. Sealdah is the best convenient to all but it is congested, Howrah is far from East Kolkata. So Chitpur or SRC is the only terminal from where passengers can avail easily