Odisha Train Accident: Why KAVACH Anti-Collision Technology Didn't Work?

In a massive train crash on Friday involving three trains, including Coromandel Express, at least 233 people were killed and about 900 injured in Odisha prompting immediate rescue action which continued on Saturday morning too. The toll could go up as bodies were still being recovered while the Odisha government ordered a state mourning on Saturday cancelling all events. Railway Minister Ashwini Vaishnaw visited the site of the accident and took stock of the situation. Amid all this an old video of the Railway Minister Ashwini Vaishnaw is going viral on social media in which he can be seen talking about the KAVACH Anti-Collision technology used in the trains in India to prevent collisions from happening, thereby prompting the twitter user to ask why the indigenous anti-collision technology 'KAVACH' didn't stop the Odisha train accident from happening? #TrainAccident #CoromandelTrainAccident #AshwiniVaishnaw #KAVACH #OdishaTrainTragedy ~PR.152~HT.96~

Odisha Train Accident: The Indian Railways also confirmed that the KAVACH anti-collision technology was not available during the Balasore crash. 

Diversion of passenger train to loop line meant that there was no time for anti-collision technology to have deployed as passenger train decelerated from 128...

West Bengal CM Mamata Banerjee questioned the Centre why Coromandel Express and Bengaluru-Howrah Express didn't have anti-collision devices and said "Two types...