The document discusses the development of an Anti-Collision Device (ACD) by Konkan Railways to prevent train collisions in India. The ACD uses a microprocessor and GPS technology to track train locations and automatically apply brakes if trains get too close. It consists of onboard units installed on locomotives and guard vans, as well as trackside units at stations and level crossings. The ACD communicates via digital radio and its microprocessor uses an Intel chipset to execute the collision prevention system. It was created to address several deadly train collisions between 1999-2003.