The planned European train control system (ETCS) for Bengaluru Suburban Transport Project (BSTP) will cost more than Rs 1,000 crore just for Corridors 2 and 4. Bengaluru suburban rail project is likely to adopt European Train Control System (ETCS), replacing Communication-Based Train Control (CBTC) signalling system originally proposed in the. Bengaluru: Bengaluru Suburban Transport Project (BSTP) has achieved just 19.