The Delhi Metro Rail Corporation and Bharat Electronics Limited (BEL) on Wednesday joined hands to develop an indigenous communication-based train control (i-CBTC) system, officials said. The team has commenced work at the i-CBTC lab of the Delhi Metro Rail Corporation (DMRC) and will soon develop and deploy a prototype i-CBTC product on a “designated test track” within the DMRC network, they said.