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  2. Anti-collision device - Wikipedia

    en.wikipedia.org/wiki/Anti-collision_device

    Overview. The ACD Network is a train-collision prevention system invented by Rajaram Bojji and patented by Konkan Railway Corporation, a public-sector undertaking of the Ministry of Railways, government of India . Anti-collision devices were found to be effective in the Southern Railway zone after a brief trial. [citation needed]

  3. Category:Aircraft collision avoidance systems - Wikipedia

    en.wikipedia.org/wiki/Category:Aircraft...

    Terrain awareness and warning system. Traffic collision avoidance system. Categories: Aircraft instruments. Aviation safety. Aircraft collisions.