The Minister of State for Railways Manoj Sinha has informed the Lok Sabha recently about the completion of feasibility study for High Speed Rail Corridor. A joint feasibility study for Mumbai-Ahmedabad High Speed Rail (Bullet Train) Corridor co-financed by India and Japan, which started in December 2013, has been completed in July, 2015. Government has initiated a feasibility study for Diamond Quadrilateral Network of High Speed Trains comprising of four sides i.e. (i) Delhi-Mumbai, (ii) Mumbai-Chennai, (iii) Chennai-Kolkata, (iv) Kolkata-Delhi; and both diagonals i.e. (v) Delhi-Chennai and (iv) Mumbai-Kolkata.