Technical glitch or human error: questions surface over India train crash

A passenger train derailed after hitting a parked goods train and another train crashed into the derailed coaches, NDTV reports

After a crash involving three trains in India’s Odisha state, questions are being raised about possible operational lapses that could have contributed to the tragedy.

The death toll from the country's deadliest collision in more than two decades surged to 261 and more than 650 are injured, Reuters reported.

Between 6.50 and 7.10 pm on Friday, two collisions took place at Odisha's Balasore between three trains, leaving a mass of wrecked compartments and coaches on top of one another, according to Indian broadcaster NDTV.

A passenger train, the Coromandel Shalimar Express, derailed after hitting a parked goods train and another train, the Yesvantpur-Howrah Superfast, crashed into the derailed coaches.

The impact was so hard that coaches were lifted high into the air before they smashed onto the tracks.

One coach was tossed on its roof. Seventeen coaches of the two trains were severely damaged.

The Railways Ministry has ordered a probe into what may have caused the crash.

There are more than one versions of how the back-to-back crashes took place, but what is certain is that there were three trains and two collisions at the same spot.

Among the many questions surrounding the accident is how the Coromandel Shalimar Express was on the same track as the stationary goods train. Was it a technical glitch or a human error?

Many raised the possibility of a signal error, according to the NDTV.

The Railways Ministry has been in the process of installing an anti-collision system "Kavach" across the country. Kavach alerts when a train jumps a signal (Signal Passed at Danger -- SPAD), which is the leading cause of train collisions. The system can alert the train driver, take control of the brakes and stop the train when it notices another train on the same tracks.

Kavach was not available on the route involved in the accident, NDTV said, citing Railways spokesperson Amitabh Sharma.

The worst-affected parts of the Coromandel Express were the Sleeper class coaches, which are usually packed as during the holidays, even non-reserved passengers get in.

Authorities have provided conflicting accounts on which train derailed first to become entangled with the other, according to Reuters.

According to Indian Railways, its network facilitates the transportation of over 13 million people a day. But the state-run monopoly has had a patchy safety record because of ageing infrastructure.