The Minister for Civil Aviation Ashok Gajapathi Raju in a written reply in Rajya Sabha also said that Commissioner of Railway safety (CRS) is mandated to inspect and report to the central government for sanctioning new Railway lines in the country.
CRS comes under the administrative control of Civil Aviation Ministry.
"Enquiries into the reasons of recent accidents/ derailment of trains are in progress," Raju said in a written reply to a question whether CRS is responsible for recent accidents/ derailment of trains and also whether these tracks were given necessary clearance by the CRS or not.
"Periodical inspections of old lines are also undertaken by the CRS," the minister said.
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Faced with a series of derailments, Railways has been allocated in the 2017-18 Union Budget separate fund for safety upgradation of the rail network as the budget proposed an outlay of Rs 1 lakh crore for the purpose.
Railway has constituted a task force on safety on December 6 last year after the derailment near Kanpur, killing 151 people.