IR has cleared the Rs 120 billion proposal to equip 6,000 electric locomotives with the European Train Control System (ETCS), Level II, in a bid to improve safety and prevent accidents. The Railway Board has further decided to install the ETCS, Level II on the entire 9,054 km Golden Quadrilateral route connecting the four metros, to make it an accident-free corridor. Currently, IR has a basic automatic train protection system based on the ETCS, Level I specification to provide a backup to loco pilots on limited stretches.