Explained | How does the rail interlocking rail system
The story so far: An electronic track management system used by the railways has become the focus of investigations after last week’s horrific train crash involving two express trains and a goods train in Odisha’s Balasore district that left 275 passengers dead and more than 1,000 injured. The Indian Railways defines it as a “microprocessor-based interlocking equipment to read the yard and panel inputs; process them in a ‘fail-safe’ manner and generate required output.” Unlike the conventional relay interlocking system, the “interlocking logic” in an EI system is managed via software and electronic components. The three components that form the basis of an electronic interlocking signal system are: Signal: Based on the status of the track ahead, light signals direct a train to stop, proceed, or exercise caution. Mr. Vaishnaw said that a “change that was done” to the electronic interlocking led the Coromandel Express off the main line and onto the loop line where it crashed into a stationary goods train.
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