Railway Minister Suresh Prabhu today announced, an overnight double-decker train would be launched between Coimbatore in Tamil Nadu and Bangalore city by September end. Mr Prabhu was talking after launching several amenities in the outskirts of Coimbatore in Tamil Nadu. <br/><br/>The Railway Minister said, his ministry is also in the process of developing a Southern Freight Corridor, which would be connected to one of the three other corridors.