NEW DELHI: Travelling time between Delhi and Kolkata will be cut down to as less as  five hours by operating a bullet train on the route, a firm commissioned by the  Railways has suggested. The Bullet train is expected to run about 300 km per hour on the dedicated track. The feasibility study is being undertaken for the 1513 km long Delhi-Kolkata high  speed corridor along with two other routes of the Diamond Quadrilateral project, said a senior...